研究者詳細 - 馬　廷麗

論文 - 馬　廷麗

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Multiple health indicators assisting data-driven prediction of the later service life for lithium-ion batteries 査読有り国際誌

Jiang H., Wang H., Su Y., Kang Q., Meng X., Yan L., Ma T.

Journal of Power Sources 542 2022年09月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Data-driven method is an efficient tool for diagnostics and prognostics of lithium-ion batteries during their manufacturing and service period. Accurately predicting the later service life of batteries is a meaningful task. Still, it remains a challenge due to the nonlinear rapid capacity decay caused by the accumulation of inner electrochemical deterioration. Here, we use a classic deep neural network algorithm to study the degradation laws in later battery service life under the common role of multiple health indicators. A battery cyclic data pre-processing method is proposed and several characteristic parameters with a high correlation to battery life are carefully selected. Our models achieve an average test error within 5% using any continuous 30 cycles of data to predict the battery capacity curve in the next 200 cycles. This study highlights the promise of combining deliberate data processes with health indicators in data-driven modeling to predict the later service life of lithium-ion batteries.

DOI： 10.1016/j.jpowsour.2022.231818

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Simulated solar light-driven photothermal preferential oxidation of carbon monoxide in H<inf>2</inf>-rich streams over fast-synthesized CuCeO<inf>2–x</inf> nanorods 査読有り国際誌

Guo X., Ye W., Chen Z., Zhou A., Jin D., Ma T.

Applied Catalysis B: Environmental 310 2022年08月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Aiming for purification the trace amount of CO in H2-rich streams with reduced energy consumption and low cost, solar-driven photothermal preferential oxidation of carbon monoxide on the non-precious metal oxide catalyst is proposed in this work. Cu doped CuCeO2−x nanorods catalysts were synthesized with a fast and simple coprecipitation method at the room temperature, which shows high CO oxidation activity in photothermal preferential oxidation of CO (CO-PROX) under UV-Vis-IR light irradiation. Rely on the various characterization methods such as UV-Vis-IR diffuse reflection spectrum (UV-Vis-IR DRS), photoluminescence spectrum (PL), transient photocurrent test, HRTEM, XRD, XPS, UV-Raman and H2-TPR, the optical and chemical properties of the CuCeO2−x nanorods catalysts were uncovered. The photothermal catalytic activity of CuCeO2−x nanorods doped with 10 wt% Cu reaches to 90% CO conversion under Xe lamp illumination (2.5 suns), and the solar driven photothermal CO-PROX reaction on CuCeO2−x nanorods were proposed to be proceeded by the light-to-thermal conversion and subsequently to drive a thermal catalytic process. The catalytic performance of CuCeO2−x nanorods in photothermal CO-PROX is closely related to the photo-to-thermal conversion efficiency and Cu-Ce synergetic interaction of CuCeO2−x nanorods catalyst. The introduction of CuOx greatly broaden the optical absorption range and promotes the light absorption capacity of ceria nanorods, which induces the catalyst with high photo-to-thermal conversion capability. Moreover, the optimal copper dopant benefits to enhance the Cu-Ce synergetic interaction and accelerate the oxidation reaction taking place at low temperature. CuCeO2−x nanorods catalyst shows promising competitive activity and ultra-low cost compared with the noble-based catalyst for the purification of hydrogen streams by the clean and eco-friendly sunlight sources.

DOI： 10.1016/j.apcatb.2022.121334

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Organic/inorganic hybrid quaternary ionogel electrolyte with low lithium-ion association and uniform lithium flux for lithium secondary batteries 査読有り国際誌

Zhang Y., Li P., Qiao L., Sun J., Li G., Yan Y., Liu A., Ma T., Hao C.

Electrochimica Acta 416 2022年06月

記述言語：英語掲載種別：研究論文（学術雑誌）

High-energy-density lithium secondary batteries require high-voltage electrolyte. Ionic liquids with wide electrochemical window have been regarded as promising electrolyte candidate for high-safety electrochemical devices. However, the solvation state of lithium ions severely restricts the conductivity due to the sluggish kinetics of lithium-ion cluster. Moreover, the leakage risk also impedes its practical application. Here, we propose to mitigate the above issues by designing organic/inorganic hybrid quaternary ionogel electrolyte (PSIL). The key to our strategy is promoting the dissociation of Li (TFSI)2− cluster and increasing the percentage of free Li+ in the ionogel electrolyte. The amorphous matrix formed by PEO and SiO2 increases the interaction between Li+ and PEO, reducing the association of Li (TFSI)2− cluster. And then, the synergistic transportation of lithium ions by PEO and ionic liquid promises the high conductivity of PSIL. As a result, the ionogel electrolyte shows a high conductivity of 1.50 ×10−3 S•cm−1at 20 ℃. The impressive electrochemical performance with LiFePO4 cathode indicates the high compatibility with the electrode. The ex-situ SEM and molecular dynamic simulation both demonstrate the uniform transportation of lithium ions during the electrochemical process and indicate the successful design for the quaternary ionogel electrolyte.

DOI： 10.1016/j.electacta.2022.140292

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Highly efficient and stable perovskite solar cells induced by novel bulk organosulfur ammonium 査読有り国際誌

He Z., Xu C., Li L., Liu A., Ma T., Gao L.

Materials Today Energy 26 2022年06月

記述言語：英語掲載種別：研究論文（学術雑誌）

The additives can improve the crystallization and formation, passivate defects, stabilize the phase state, and adjust the interfacial structure and energy level of perovskite film in perovskite solar cells. Most additives are single functional additives and bifunctional additives. Only a few investigations have been reported about the multifunctional additives. In this work, a novel bulk organosulfur ammonium has been synthesized and utilized as multifunctional additive in perovskite solar cells. Due to the specific structure, the dithiooxamide iodide (DTAI2) additive could improve the crystallization of perovskite film, reduce the trap state density, and prevent the ionic migrating, resulting in the improved power conversion efficiency. The mechanism of the enhanced efficiency has been systematically discussed based on the photophysical properties.

DOI： 10.1016/j.mtener.2022.101004

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Petal-like Fe<inf>x</inf>S<inf>y</inf>/WS<inf>2</inf>Heterojunction Nanosheets as an Electrocatalyst for Highly Effective Hydrogen Evolution Reaction 査読有り国際誌

Chen H., Li Y., Huang H., Kang Q., Ma T.

Energy and Fuels 36 ( 9 ) 4888 - 4894 2022年05月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Developing transition metal sulfide electrocatalysts with high efficiency for hydrogen evolution reaction (HER) are highly expected to promote the development of hydrogen energy. Herein, novel iron tungsten sulfide heterojunction nanosheets (FexSy/WS2Ns) with a petal-like structure were prepared by a facile hydrothermal method. The prepared petal-like FexSy/WS2Ns owned a large diameter size of ∼1 μm and a thickness of 8 nm for each flake. The developed FexSy/WS2Ns exhibited excellent HER activity with an overpotential of 118 mV at 10 mA cm-2and a low Tafel slope of 87 mV dec-1in 0.5 M H2SO4, which is much better than that of single FexSyand WS2(>420 mV at 10 mA cm-2). This advanced HER activity is owed to the unique thin structure and more exposed active sites provided by defects between the crystal interface of FexSyand WS2. Furthermore, the FexSy/WS2Ns as a bifunctional electrocatalyst could achieve energy-saving water-splitting by replacing the oxygen evolution reaction with the urea oxidation reaction to decrease the applied voltage to 147 mV.

DOI： 10.1021/acs.energyfuels.2c00483

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A comprehensive study on ZIF-8/SiO<inf>x</inf>/ZIF-8 core-shell composite as high-stable anode material for lithium-ion batteries 査読有り国際誌

Zou W., Li T., Yao Z., Fan M., Ma T.

Journal of Electroanalytical Chemistry 912 2022年05月

記述言語：英語掲載種別：研究論文（学術雑誌）

Silicon oxide is a potential candidate for lithium-ion battery anode material, but its commercial application is heavily restricted by the low conductivity and serious volume expansion during charge/discharge cycles. Here, ZIF-8/SiOx/ZIF-8 composite, with core–shell structure, was designed and prepared to overcome the above defects. The ZIF-8/SiOx/ZIF-8 composite shows 966/986 mAh g−1 after the 200th charge/discharge cycle at 0.1C, and the efficiency is up to 98%. Microstructure characterization shows that ZIF-8 not only regulates the particle size of SiOx, but also builds a three-dimensional network structure, which provides a buffer space to support the volume changes of SiOx during charge/discharge and prevent the loss of capacity caused by SiOx breaking away from the anode surface. In addition, the influence of carbonization at 600 °C on ZIF-8/SiOx/ZIF-8 composite was systematically investigated. The carbonized composite shows a charge/discharge capacity (0.1C) of 926/938 mAh g−1 after 200 cycles, and the coulombic efficiency reaches 99%. Our study provides a feasible strategy for obtaining a core–shell SiOx-based composite, which effectively promotes the development of high-capacity Li-ion battery anode material.

DOI： 10.1016/j.jelechem.2022.116258

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Mechanism of oxygen reduction reaction on Ni/CNTs and Ni/X-CNTs (X=B, N, O) catalysts: a theoretical study 査読有り国際誌

Zhu H., Yang Y., Kong M., Ren X., Ma T., Liu A.

Theoretical Chemistry Accounts 141 ( 5 ) 2022年05月

記述言語：英語掲載種別：研究論文（学術雑誌）

Fuel cell is an emerging technology for energy conservation and environmental protection, with simple structure and high energy conversion efficiency. However, the kinetics of cathode ORR is slow. Therefore, high-performance, highly selective catalysts are urgently needed. This work aims to use the DFT to conduct structural design and performance optimization of Ni/CNTs and Ni/X-CNTs (X=B, N, O) catalysts. Studies showed that the number of Ni atom loading, the number and types of doping of heteroatoms all affected the activity of catalysts to some extent. The adsorption energy of O2 was calculated to determine that O2 was adsorbed on Ni(6)/B(2)-CNTs in the Bridge mode. Meanwhile, the comparative analysis of 2 e− path and 4 e− path indicated that ORR occurred in Ni(6)/B(2)-CNTs in acidic medium was more inclined to follow the 4 e− path. The present work has some reference and value for specific experiments.

DOI： 10.1007/s00214-022-02888-4

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Trimetal NiCoMn sulfides cooperated with two-dimensional Ti<inf>3</inf>C<inf>2</inf> for high performance hybrid supercapacitor 査読有り国際誌

Zhang J., Yao Z., Zou W., Shen Q., Fan M., Ma T.

Journal of Solid State Chemistry 308 2022年04月

記述言語：英語掲載種別：研究論文（学術雑誌）

Transition trimetallic sulfide NiCoMn–S attracts great attention due to its high specific capacity for hybrid supercapacitors, as well as Ti3C2 is considered essentially as a potential new electrode material with iconic two-dimensional layered structure and excellent conductivity. Herein, NiCoMn–S nanoparticles are composited with two-dimensional layered Ti3C2 via simple one-step hydrothermal method, which is first applied as positive electrode in hybrid supercapacitors (HSCs). A large number of NiCoMn–S nanoparticles distribute on the surface of Ti3C2 and even insert into the Ti3C2 layers, providing abundant electrochemical active sites for redox reaction and enhancing the mechanical stability for composites. Moreover, the NiCoMn–S/Ti3C2 composites show lower charge-transfer resistance than pure NiCoMn–S, illustrating that the two-dimensional layered structure of Ti3C2 improve the conductivity and supply additional electronic channels for ion transportation. The NiCoMn–S/Ti3C2-3.4% delivers a specific capacity of 347.1 C g−1 at a specific density of 1 A g−1, which is 28% higher than that of pure NiCoMn–S (270.2 C g−1 at 1 A g−1). Finally, a hybrid supercapacitor (HSC) is assembled by using NiCoMn–S/Ti3C2-3.4% as positive electrode and RGO as negative electrode, realizing a specific capacity of 164.3 C g−1 at 1 A g−1 and high specific energy of 16.2 Wh kg−1 at a specific power of 15 kW kg−1.

DOI： 10.1016/j.jssc.2022.122909

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Synthesis of one-dimensional vanadium-doped CoS/Co<inf>9</inf>S<inf>8</inf> heterojunctions as bifunctional electrocatalysts for zinc-air battery 査読有り国際誌

Huang H., Liu A., Kang Q., Ye X., Chen H., Su W.N., Ma T.

Materials Today Energy 25 2022年04月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Cobalt-based electrocatalysts have been considered promising materials for the oxygen evolution reaction (OER). Herein, we now report the synthesis of vanadium-doped CoS/Co9S8 heterostructures embedded on carbon nanorods (V-CoS/Co9S8@CNR), which was realized through one-step sulfurization of Zeolitic Imidazolate Framework-67 (ZIF-67) grown on V2O5 nanorods (V2O5@ZIF-67). The results of experiment and theoretical calculation verified that because of the vanadium dopant and the coupled nanointerface that can expedite the synergistic effect of Co9S8 and CoS, the obtained V-CoS/Co9S8@CNR showed an excellent OER catalytic performance (269 mV@10 mA/cm2) and comparable ORR catalytic performance. The assembled rechargeable Zn-air batteries displayed a superior performance as well as high charging–discharging cycling stability (>200 h) with a slight increase in the voltage gap.

DOI： 10.1016/j.mtener.2022.100968

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Sn/SnO<inf>x</inf> core-shell structure encapsulated in nitrogen-doped porous carbon frameworks for enhanced lithium storage 査読有り国際誌

Liu K., Meng X., Yan L., Fan M., Wu Y., Li C., Ma T.

Journal of Alloys and Compounds 896 2022年03月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Sn-based materials are promising as high-capacity anode materials for lithium-ion batteries. A novel Sn/carbon composite is obtained facilely by using Sn-based metal-organic frameworks and dicyandiamide as precursors. The composites are composed of Sn/SnOx core-shell microspheres encapsulated in 3D porous nitrogen-doped carbon frameworks (denoted as Sn/SnOx@NC). When used as anode material for lithium-ion batteries, the Sn/SnOx@NC composite exhibites a high reversible capacity of 817.8 mA h g−1 at 100 mA g−1 after 200 cycles and 525.7 mA h g−1 at 1 A g−1 after 800 cycles. It also exhibits high capacity retention and high Coulombic efficiency. The excellent electrochemical performance can be primarily ascribed to the peculiar porous N-doped carbon frameworks, which can effectively buffer the huge volume change of Sn and promote the transmission of electrons and Li+, thereby indicating its potential for use as an anode material for Li-ion batteries.

DOI： 10.1016/j.jallcom.2021.163009

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A cross-linked tin oxide/polymer composite gel electrolyte with adjustable porosity for enhanced sodium ion batteries 査読有り国際誌

Zhao Y., Liu H., Meng X., Liu A., Chen Y., Ma T.

Chemical Engineering Journal 431 2022年03月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Solid electrolytes have a great potential to replace traditional flammable liquid electrolytes for lithium/sodium ion batteries. However, the solid electrolytes have a low ionic conductivity and poor interface properties, so it is difficult for them to reach the level of conventional liquid electrolyte systems. We have now built an adjustable porous 3D network structure by contacting PVDF-HFP and SnO2, and optimized the ion conductive path in the gel polymer electrolyte by adding 1-(4-cyanophenyl)-guanidine. PVDF-HFP with a 3D network structure provides a channel for storing and transporting sodium ions, and the imino nitrogen atom of 1-(4-cyanophenyl)guanidine can form a ligand with sodium ions to enhance the conduction of Na+. The gel polymer electrolyte (PSGGSE) thus obtained has an ion conductivity of 0.232 mS cm−1 at 70 °C, and is easy to form a stable interface layer with the anode. Further experiments showed that compared with liquid electrolytes, a more stable interface was formed between PSGGSE and the anode. Cycling tests of Na/PSGGSE/Na symmetric batteries under different current densities showed that no short circuit occurred after 400 h, indicating that the battery could not be short-circuited, and PSGGSE can effectively inhibit the growth of Na dendrites. In addition, the Na/PSGGSE/NiMoO4 battery has an excellent cycling stability at the current density of 100 mA g−1, and still maintains a high capacity of 150 mAh g−1 after 200 cycles, which is much higher than that of liquid electrolytes.

DOI： 10.1016/j.cej.2021.133922

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Template synthesis of molybdenum-doped NiFe-layered double hydroxide nanotube as high efficiency electrocatalyst for oxygen evolution reaction 査読有り国際誌

Yin Z., Liu X., Cui M., Cao Z., Liu A., Gao L., Ma T., Chen S., Li Y.

Materials Today Sustainability 17 2022年03月

記述言語：英語掲載種別：研究論文（学術雑誌）

Oxygen evolution reaction (OER) with four proton–electron coupled transfer process is a half-reaction that restricts the development of rechargeable metal-air batteries and water splitting devices, and it is of great significance to develop inexpensive and efficient OER catalysts. Herein, Mo-doped NiFe-layered double hydroxide (Mo–NiFe-LDH) nanotubes are synthesized using a self-sacrificial template method. Benefitting from the unique nanostructure, Mo–NiFe-LDH-2 exhibits a large electrochemical surface area of 63.94 cm2. In addition, a strong electronic interaction occurs between Mo, Fe, and Ni after Mo doping, resulting in highly active Ni3+ sites. Consequently, the Mo–NiFe-LDH-2 shows high OER activity with an overpotential of 317 mV to deliver a current density of 20 mA cm−2 and a small Tafel slope of 44 mV dec−1. This work provides a feasible strategy to develop high efficiency electrocatalysts through transition metal doping and structural regulation.

DOI： 10.1016/j.mtsust.2021.100101

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Praseodymium-doped triple-cation perovskite layer for enhanced photovoltaic performance 査読有り国際誌

Sun L., Zhang C., Yan L., Gao L., Ma T.

Journal of Solid State Chemistry 307 2022年03月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Doping a hybrid perovskite semiconductor with metal elements offers an effective means of adjusting its photoelectric properties. To give one example, it has been found that adding lanthanide elements such as Europium (Eu) and Samarium (Sm) into a perovskite layer enhances the photovoltaic performance and photothermal stability of perovskite solar cells. In this study, we therefore added different Praseodymium (Pr)/Lead (Pb) ratios from 0% to 1% to perovskite films in a precursor solution of tri-cation perovskite. We found the photoelectric properties and device performance of perovskite solar cells doped with 0.25% Praseodymium ion (Pr3+) to be significantly improved, with a champion power conversion efficiency (PCE) of 18.56% obtained. Furthermore, the stability of perovskite solar cells (PSCs) with 0.25% Pr3+ doping improved effectively. Overall, with Pr3+ doping, the carrier mobility was dramatically enhanced, and the carrier recombination effectively hindered. These results therefore indicate that Pr3+ doping causes the perovskite to produce lattice shrinkage. As such, the findings shed light on a fresh dopant engineering tactic for fabricating high performance perovskite solar cells.

DOI： 10.1016/j.jssc.2021.122826

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Interface engineering of the MoS<inf>2</inf>/NiS<inf>2</inf>/CoS<inf>2</inf> nanotube as a highly efficient bifunctional electrocatalyst for overall water splitting 査読有り国際誌

Yin Z., Liu X., Chen S., Xie H., Gao L., Liu A., Ma T., Li Y.

Materials Today Nano 17 2022年03月

記述言語：英語掲載種別：研究論文（学術雑誌）

Developing advanced electrocatalysis for overall water splitting is the important premise of sustainable and green production of hydrogen. In this work, we report a self-template method to synthesis MoS2/NiS2/CoS2 nanotube based on MoO3 nanorod. The interface engineering and strong electronic interaction of the heterogeneous catalyst greatly increase the electron density around the Fermi level, which could facilitate the adsorption of H and OH-containing intermediates. Ultraviolet photoelectron spectroscopy measurement demonstrates the enhanced electron density, and density functional theory calculation reveals the strengthened H and OH adsorption based on the Gibbs free energy. Combined with the large electrochemical surface area brought by the unique nanotube structure, the MoS2/NiS2/CoS2 displays low overpotentials of 101 and 230 mV to achieve a current density of 10 mA/cm2 for hydrogen evolution reaction and oxygen evolution reaction. In addition, the catalyst can stably drive overall water splitting at a cell voltage of 1.58 V, demonstrating its potential applications.

DOI： 10.1016/j.mtnano.2021.100156

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Unveiling the Effect of Solvents on Crystallization and Morphology of 2D Perovskite in Solvent-Assisted Method 査読有り国際誌

Su Y., Xue J., Liu A., Ma T., Gao L.

Molecules 27 ( 6 ) 2022年03月

記述言語：英語掲載種別：研究論文（学術雑誌）

Controlling the crystallographic orientations of 2D perovskite is regarded as an effective way to improve the efficiency of PSCs based on 2D perovskite. In this paper, five different assistant solvents were selected to unveil the effect of solvents on crystallization and morphology of 2D perovskite in a solvent-assisted method. Results demonstrated that the effect of Lewis basicity on the crystallization process was the most important factor for preparing 2D perovskite. The stability of the intermediate, reacted between the solvent and the Pb2+, determined the quality of 2D film. The stronger the Lewis basicity was, the more obvious the accurate control effect on the top-down crystallization process of 2D perovskite would be. This could enhance the crystallographic orientation of 2D perovskite. The effect of Lewis basicity played a more important role than other properties of the solvent, such as boiling point and polarity.

DOI： 10.3390/molecules27061828

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Multifunctional porous carbon strategy assisting high-performance aqueous zinc-iodine battery 査読有り国際誌

Yan L., Liu T., Zeng X., Sun L., Meng X., Ling M., Fan M., Ma T.

Carbon 187 145 - 152 2022年02月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Despite its cost-effectiveness and intrinsic safety, the aqueous zinc-iodine battery is still struggling with the rapid performance degradation arising from the uneven deposition of the zinc anode and the dissolution of the iodine cathode. An effective solution of addressing the above issues simultaneously is urgently needed. Here we propose a strategy of using one porous carbon to modify the zinc anode and immobilize the iodine active materials. Zinc citrate-derived porous carbon is selected as a study model. The conductive porous carbon can not only greatly reduce the zinc nucleation barrier, and guide a uniform deposition of zinc ions, but also notably suppress the dissolution of iodine species and enhance the reaction kinetics. As a consequence, the optimized zinc-iodine battery exhibits capacity retention of 88.1% after 3000 cycles at 12C, finishing a cycle within 5 min.

DOI： 10.1016/j.carbon.2021.11.007

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Current progress of metal sulfides derived from metal-organic frameworks for advanced electrocatalysis: Potential electrocatalysts with diverse applications 査読有り国際誌

Liu X., Li Y., Cao Z., Yin Z., Ma T., Chen S.

Journal of Materials Chemistry A 10 ( 4 ) 1617 - 1641 2022年01月

記述言語：英語掲載種別：記事・総説・解説・論説等（学術雑誌）

The large-scale application of clean electrochemical energy storage and conversion systems such as water-splitting devices and Zn-air batteries greatly depends on the development of low-cost and highly efficient electrocatalysts. Transitional metal sulfides (TMSs) have gained great research interest owing to their high intrinsic catalytic activity, adjustable electronic structures, and various crystal structures and phases. Meanwhile, metal-organic frameworks (MOFs) are ideal precursors for the preparation of TMSs due to the diverse metal nodes, organic ligands, topologies, and morphologies of MOFs. In addition, MOFs could act as hosts for the incorporation of guest molecules, which could further expand the metal types of TMSs. In this review, the recent progress of MOF-derived TMS electrocatalysts for hydrogen evolution reactions (HERs), oxygen evolution reactions (OERs) and oxygen reduction reactions (ORRs) are summarized. After a brief introduction to the reaction mechanisms, the preparation strategies, structures, catalytic performances, and catalytic mechanisms of the TMSs are discussed to give readers a comprehensive understanding of this prosperous field. The strategies such as nanostructure engineering, interface engineering and heteroatom doping used to improve the performance of the electrocatalysts are discussed in each section. In addition, bifunctional catalytic performances of the catalysts for overall water splitting and rechargeable Zn-air batteries are illustrated. Furthermore, challenges and opportunities for the future development of this field are proposed. We expect this review could provide guidelines for the design and fabrication of TMSs, and initiate more efforts and new discoveries in this emerging research area.

DOI： 10.1039/d1ta09925f

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A double perovskite participation for promoting stability and performance of Carbon-Based CsPbI<inf>2</inf>Br perovskite solar cells 査読有り国際誌

Han Q., Yang S., Wang L., Yu F., Cai X., Ma T.

Journal of Colloid and Interface Science 606 800 - 807 2022年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

All-inorganic perovskite materials (Typically: CsPbI2Br) have attracted enormous attention due to their illustrious thermal stability and appropriate bandgap, and their use in perovskite solar cells (PSCs) has been extensively investigated. However, the inevitable defects of the perovskite layer, energy level mismatch between perovskite and carbon electrodes, and the phase instability of CsPbI2Br limit the power conversion efficiency (PCE) and stability of carbon-based CsPbI2Br PSCs. Herein, we demonstrate a simple and effective strategy for regulating energy level, inhibiting carrier recombination, and delaying the degradation of perovskite by modifying the surface of CsPbI2Br with a new type of 2D perovskite Cs2PtI6. The carbon-based CsPbI2Br PSCs achieve a higher PCE (13.69 %) than the control device (11.10 %). The excellent matching of the energy level and suppression of charge carrier recombination should be responsible for the improvement in efficiency. Furthermore, the excellent hydrophobic performance of Cs2PtI6 enhances the moisture resistance of the device. This study provides a potential strategy for improving the performance and stability of all-inorganic CsPbI2Br PSCs.

DOI： 10.1016/j.jcis.2021.07.122

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Ru and Fe Alloying on a Two-Dimensional MXene Support for Enhanced Electrochemical Synthesis of Ammonia 査読有り国際誌

Liu A., Liang X., Gao M., Ren X., Gao L., Yang Y., Zhu H., Li G., Ma T.

ChemCatChem 14 ( 7 ) 2022年01月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）

Compared with the energy-intensive Haber-Bosch process, the electrocatalytic nitrogen reduction reaction (NRR) is a promising approach for sustainable ammonia production. However, the design and development of electrocatalysts with high activity and selectivity is currently a major challenge. In this work, we successfully constructed RuFe bimetallic nanoparticles on a two-dimensional MXene support (RuFe@MXene) through a simple liquid phase reduction method. Benefiting from the rich surface chemistry and high electronic conductivity of MXene, as well as the synergistic effect between RuFe bimetals, the composite can efficiently synthesize ammonia under environmental conditions. Specifically, the NH3 yield and Faraday efficiency of the prepared Ru0.3Fe0.7@MXene composite catalyst reaches 40.79 μg h−1 cm−2 and 15.25 % at −0.4 V vs. RHE in 0.1 M KOH, which are significantly higher than that of the previously reported Ru@MXene. Moreover, the Ru0.3Fe0.7@MXene catalyst also exhibits outstanding electrochemical stability. The density of state (DOS) and the partial density of state (PDOS) of MXene, Fe@MXene, Ru@MXene, and RuFe@MXene were calculated by DFT to explore the synergistic effect of RuFe on the nitrogen reduction performance of MXene-based catalysts. This work guides the design of high-performance NRR electrocatalysts in the future.

DOI： 10.1002/cctc.202101775

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85123994868&origin=inward

DFT study of X-site ion substitution doping of Cs<inf>2</inf>PtX<inf>6</inf> on its structural and electronic properties 査読有り国際誌

Ye X., Liu A., Zhao Y., Han Q., Kitamura T., Ma T.

International Journal of Energy Research 46 ( 6 ) 8471 - 8479 2022年01月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

The stability and toxicity of perovskite solar cells are still preventing full industrialization. Therefore, lead-free all-inorganic double perovskite materials have become the focus of research in recent years. Our group proposed a new narrow bandgap lead-free double perovskite solar cell using a high-quality Cs2PtI6 film. In this paper, for the purpose of exploring the trend in the bandgap and stability of the perovskite-derived Cs2PtI6 substituted by halogen ions, we performed a first-principles investigation based on density functional theory to study the structural and electronic properties of Cs2PtI6−yCly, Cs2PtI6−yBry, Cs2PtBr6−yCly (y = 0, 1, 2, 3, 4, 5, 6). The calculated structural parameters revealed a good mechanical stability for all these compounds, and the trend in the formation energy indicated that the substitution of I− with Cl− and Br− can significantly reduce the energy and improve the thermodynamic stability. Through a comparative analysis of the electronic properties of Cs2PtX6 (X = Cl, Br, I), we found that the substitutional doping of halogen ions can effectively adjust the bandgap and show an obvious change trend. The present study may demonstrate an effective theoretical guidance for preparing lead-free all-inorganic perovskite solar cell materials with appropriate bandgap and excellent stability.

DOI： 10.1002/er.7696

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85123943005&origin=inward

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