Article
Chemistry, Physical
Jiachen Qiu, Yuran Lin, Shuting Zhang, Jie Ma, Yu Zhang, Mengwei Yuan, Genban Sun, Caiyun Nan
Summary: A series of hollow catalysts were synthesized based on the structure of cubic zeolitic imidazolate framework-67 (ZIF-67) through different chemical etching treatments. The TA-ZIF catalyst with a more stable hollow structure and more oxygen vacancies was found to significantly improve the performance of Li-O-2 batteries.
Article
Chemistry, Physical
Yanjie Zhai, Hui Tong, Jianlin Deng, Gaoyang Li, Yue Hou, Runhao Zhang, Jun Wang, Yingying Lu, Kang Liang, Pu Chen, Feng Dang, Biao Kong
Summary: The research demonstrates that using a p-type substrate as an adsorption/desorption promoter can significantly enhance the catalytic capability of cathode catalyst in LCBs and provide a refined reaction pathway.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Can Guo, Ming Liu, Guang-Kuo Gao, Xi Tian, Jie Zhou, Long-Zhang Dong, Qi Li, Yifa Chen, Shun-Li Li, Ya-Qian Lan
Summary: The study demonstrates that COFs can act as microadditives in Li-S batteries and enhance the reversible capacity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Lixin Xiong, Neil Qiang Su, Wei-Hai Fang
Summary: This study systematically investigates the self-catalytic effect of in-situ electrochemical cobalt doping of Li2O2 and reveals its potential mechanism for enhancing the performance of lithium-oxygen batteries. Theoretical calculations show that Co impurities in the discharge products serve as active sites to promote the formation of Li3O4, switching the nucleation mechanism. Through a comprehensive investigation of the properties of Co-doped Li2O2 and Li3O4 compounds, it is found that Li3O4 exhibits better charge/mass transport and lower overpotential, leading to improved battery performance.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Yanan Jiao, Jian Qin, Hirbod Maleki Kheimeh Sari, Dejun Li, Xifei Li, Xueliang Sun
Summary: Combining balanced CO2 emissions with energy storage technologies is an effective way to alleviate global warming, and the Li-CO2 electrochemical system, with its promising energy storage and CO2 capture strategy, is attracting attention. However, the system is still in early stages of development and faces challenges due to slow kinetics of the CO2 electrochemical reaction.
ENERGY STORAGE MATERIALS
(2021)
Article
Electrochemistry
Chanikarn Tomon, Atiweena Krittayavathananon, Sangchai Sarawutanukul, Salatan Duangdangchote, Nutthaphon Phattharasupakun, Kan Homlamai, Montree Sawangphruk
Summary: The Co3O4 catalyst with high oxygen vacancy and narrow band gap promotes superior stability in OER and ORR compared to RuO2 and Pt/C catalysts. The relative current decay for OER and ORR is only 7% and 14% for the Co3O4 catalyst, while RuO2 and Pt/C catalysts show larger decreases in stability.
ELECTROCHIMICA ACTA
(2021)
Article
Electrochemistry
Lu Zou, Ruizhu Li, Ziling Wang, Faquan Yu, Bo Chi, Jian Pu
Summary: The study investigated the catalytic activity of Cu-LSCM heterostructure in Li-CO2 battery, showing excellent CO2RR and CO2ER performance. Through the strong interaction between Cu NPs and LSCM perovskite substrate, the catalyst demonstrated superior performance and achieved high capacity, low voltage gap, and long cycle life.
ELECTROCHIMICA ACTA
(2021)
Article
Multidisciplinary Sciences
Si-Wen Ke, Wei Li, Yuming Gu, Jian Su, Yifan Liu, Shuai Yuan, Jing-Lin Zuo, Jing Ma, Ping He
Summary: In this study, bifunctional cathode catalysts for ORR/OER were constructed in a COF platform by incorporating Ni-bis(dithiolene) and Co-porphyrin units. The resulting bimetallic Ni/Co-COF exhibited high surface area, good electrical conductivity, and excellent chemical stability. Li-O2 batteries with the Ni/Co-COF-based cathode showed low discharge/charge potential gap and stable cycling, comparable to PtAu nanocrystals. DFT computations and control experiments revealed the critical role of Ni and Co sites in regulating the Li2O2 deposition.
Article
Chemistry, Multidisciplinary
Xun-Lu Li, Cui Ma, Yong-Ning Zhou
Summary: Anionic redox is a promising strategy to overcome the capacity limitation of cathode materials in secondary batteries. The introduction of vacancies in the transition metal layer enables the triggering of oxygen redox, thus improving the energy density of sodium-ion battery cathode materials. This review discusses the formation process, recent progress in understanding the working mechanisms of oxygen redox, and advanced characterization techniques for transition metal vacancies. Strategies to stabilize vacancy-containing structures and utilize reversible oxygen redox are summarized, while the challenges and prospects for further understanding transition metal vacancies are emphasized.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Xianbin Wu, Yifan Zhang, Siyuan Chen, Xingyi Zhan, Hua Zhang, Lei Zhang, Liwei Su, Chaoqi Shen, Huan Chen, Hao Wu, Lianbang Wang
Summary: This study introduces a low-carbon CeOx/Ru@RuO2 nanosheet as an efficient cathode catalyst for Li-O2 batteries and investigates its preparation and working mechanisms using various characterization and electrochemical techniques. The nanosheet exhibits optimized Li-O reaction and Li2O2 formation, providing a new material combination and structure design for developing bifunctional catalyst materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jiachen Qiu, Yuran Lin, Shuting Zhang, Jie Ma, Yu Zhang, Mengwei Yuan, Genban Sun, Caiyun Nan
Summary: In this study, a series of hollow catalysts were synthesized based on the structure of cubic zeolitic imidazolate framework-67 (ZIF-67) through various chemical etching treatments. These hollow structures have larger surface areas and can expose more active sites, leading to improved performance of Li-O-2 batteries.
Article
Chemistry, Inorganic & Nuclear
Qi Wang, Shanzhi Zhao, Hao Yu, Daohong Zhang, Qiufan Wang
Summary: The design and synthesis of hollow and porous nanostructured electrode materials is an effective strategy to improve the electrochemical performance of lithium-ion batteries and the hydrogen evolution reaction (HER). The formation mechanism and the influence of oxygen vacancies regulated by the nanoscale Kirkendall effect on the electrochemical performance of the electrode are explored. The Co@Co3O4@N-CNTs exhibit remarkable activity for catalyzing the HER and deliver a high discharge capacity after 600 cycles, showcasing potential for high-rate and highly stable energy storage systems.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Zesen Wei, Chen Liang, Lihua Jiang, Linjun Wang, Siyuan Cheng, Qingkui Peng, Lei Feng, Wenhua Zhang, Jinhua Sun, Qingsong Wang
Summary: This study focuses on the secondary particles of different Li(NixCoyMnz)O-2 cathodes, investigating the formation and condensation of oxygen vacancies on the surface, as well as the concentration distribution of oxygen vacancies inside the particles after thermal failure. The results show that increasing the Ni content promotes the diffusion of oxygen vacancies from the surface to the bulk, leading to an increase in oxygen vacancy concentration and the release of more oxygen. When the Ni content reaches 0.8, both the surface layer and bulk of the secondary particles exhibit high oxygen vacancy concentrations, resulting in overall failure. Furthermore, the formation and evolution of intergranular cracks inside the secondary particles depend on the oxygen vacancy concentration gradient.
ENERGY STORAGE MATERIALS
(2022)
Article
Materials Science, Ceramics
Juanjuan Ge, Gaohui Du, Abul Kalam, Xiang Bi, Shukai Ding, Qingmei Su, Bingshe Xu, Abdullah G. Al-Sehemi
Summary: Black TiO2 nanoparticles synthesized by calcination in argon show improved cycling stability and electrochemical activity for lithium-oxygen batteries, with reduced charging voltage and decreased side reactions and polarization, enhancing the overall cycling performance of the battery.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Yining Ma, Rui Shu, Tongxiang Xu, Jing Li, Dandan Zhu, Xiaodong Jin, Mingchen Wu, Xun Cao
Summary: (NH4)(2)V7O16 hierarchical structures were synthesized by self-assembly of nanoflakes using a one-step rotating hydrothermal method. These structures showed good rate capability and cyclic stability when used as anodic materials for aqueous Li-ion batteries. The structural evolution of the material during cycling was also investigated using ex situ XRD.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Xingzi Zheng, Mengwei Yuan, Xianqiang Huang, Huifeng Li, Genban Sun
Summary: This paper introduces a novel Li-O2 battery electrocatalyst, a surface-functionalized CoP/Ti3C2Tx composite. The composite exhibits optimized electronic structure and active electrons, which enhance the efficiency of electrochemical reactions. The accordion shaped Ti3C2Tx with large specific surface area and excellent electronic conductivity enables sufficient exposure of active sites and Li2O2 deposition. Transition metal phosphides provide more active catalytic sites and exhibit good electrocatalytic performance. As an electrocatalyst in Li-O2 battery, the CoP/Ti3C2Tx composite achieves high specific discharge capacity and low overpotential, outperforming CoP and Ti3C2Tx individually. The application of transition metal phosphides and MXene in Li-O2 battery not only demonstrates higher cycling stability of the prepared composite, but also points out the direction for improving their electrochemical performance.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Xing Cao, Aijian Huang, Chao Liang, Hsiao-Chien Chen, Tong Han, Rui Lin, Qing Peng, Zewen Zhuang, Rongan Shen, Hao Ming Chen, Yi Yu, Chen Chen, Yadong Li
Summary: This study reports reversible photochromic BiOBr nanosheets (p-BiOBr) that can change colors by trapping photogenerated holes and bleached by water oxidation to generate hydroxyl radicals, demonstrating enhanced carrier separation and water oxidation. Efficient photocatalytic coupling and oxidation reactions of ethylbenzene can be achieved by p-BiOBr in a water-based medium. The p-BiOBr nanosheets feature lattice disordered defects on the surface, which provide abundant uncoordinated catalytic sites and induce structural distortions and lattice strain, resulting in altered band structure and significantly enhanced photocatalytic performances.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Mengwei Yuan, Zemin Sun, Han Yang, Di Wang, Qiming Liu, Caiyun Nan, Huifeng Li, Genban Sun, Shaowei Chen
Summary: The insulating nature of Li2O2 and the limited activity of solid-solid/-liquid interfaces hinder the performance of lithium-air battery, but in-situ doping of Li2O2 with select metal ions can greatly enhance the battery performance.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Jingshen Xu, Na Lu, Mengwei Yuan, Genban Sun
Summary: In this study, Fe2O3/CNFs composites were prepared by the in-situ transformation method, combining carbon nanofibers (CNFs) with hollow rice-grained alpha-Fe2O3 nanoparticles. The rational microstructure design reduced the filling ratio, optimized impedance matching, and improved electromagnetic wave absorption performance. The Fe2O3/CNFs composites achieved strong reflection loss (-38.1 dB) and broad effective absorption bandwidth (4.6 GHz) at a low filling ratio (20 wt.%), and analysis of electromagnetic parameters confirmed the crucial role of the microstructure in the performance improvement. With optimized impedance matching and a simple preparation method, Fe2O3/CNFs have broad application prospects in electromagnetic wave absorption.
Article
Chemistry, Physical
Liu Lin, Ruiyun Xin, Mengwei Yuan, Tongyue Wang, Jie Li, Yunming Xu, Xuhui Xu, Mingxuan Li, Yu Du, Jianing Wang, Shuyi Wang, Fubin Jiang, Wenxin Wu, Caicai Lu, Binbin Huang, Zemin Sun, Jian Liu, Jinlu He, Genban Sun
Summary: Based on experimental and theoretical studies, the spin-magnetic effect of iron group layered double hydroxides (LDHs) was found to enhance the oxygen evolution reaction (OER) process. The saturation magnetization of iron group LDHs positively correlates with their OER performance under different magnetic fields. Among the tested LDHs, NiCoFe-LDHs show the strongest OER activity and saturation magnetization.
Review
Electrochemistry
Mengwei Yuan, Xingzi Zheng, Jingshen Xu, Qiao Ni, Luoqi Luo, Zejun Cai, Zemin Sun, Liu Lin, Genban Sun
Summary: MXenes, as typical two-dimensional layered structure materials, have been widely used in energy conversion and storage due to their high conductivity, ion transport ability, and rich surface structures. Recently, MXenes and their composites have been widely employed in secondary batteries, especially sodium-ion batteries (SIBs), with obvious performance improvement. By utilizing the advantages of MXenes, the construction of surface-functionalized MXenes and MXene-based composites effectively improves the conductivity and mass-transport properties of composites, alleviates volume expansion, and enhances the capacity properties, rate performances, and cycle stability of SIBs.
Article
Chemistry, Physical
Yayin Li, Mengwei Yuan, Han Yang, Kefan Shi, Zemin Sun, Huifeng Li, Caiyun Nan, Genban Sun
Summary: Oxygen evolution reaction (OER) is the rate-limiting step in water-splitting. By regulating the electronic structure and spin state density of Ni-sites, Ni-MOF with transition metals showed high catalytic activities for OER. This work provides a new reference for understanding the catalytic mechanism and designing spin electrocatalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Hongling Yang, Xiaoxu Wang, Qinggang Liu, Aijian Huang, Xun Zhang, Yi Yu, Zewen Zhuang, Ganggang Li, Yang Li, Qing Peng, Xin Chen, Hai Xiao, Chen Chen
Summary: Scientists have developed a selective epoxidation strategy using a heterogeneous catalyst comprising iridium single atoms, resulting in molecular-like catalysis. This strategy provides near-perfect selectivity (99%) for producing valuable ethylene oxide through pi-coordination between the iridium metal center and ethylene or molecular oxygen. The formation of five-membered oxametallacycle intermediates facilitates the high selectivity for ethylene oxide. This molecular catalysis model of single-atom catalysts can effectively inhibit the overoxidation of the desired product.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Jiachen Qiu, Yuran Lin, Shuting Zhang, Jie Ma, Yu Zhang, Mengwei Yuan, Genban Sun, Caiyun Nan
Summary: A series of hollow catalysts were synthesized based on the structure of cubic zeolitic imidazolate framework-67 (ZIF-67) through different chemical etching treatments. The TA-ZIF catalyst with a more stable hollow structure and more oxygen vacancies was found to significantly improve the performance of Li-O-2 batteries.
Article
Chemistry, Physical
Yu Zhang, Shuting Zhang, Mengwei Yuan, Yufeng Li, Rong Liu, Caiyun Nan, Chen Chen
Summary: Through regulating the synthesis process, ZnCo2O4 with a unique Co site was obtained by replacing Co2+ and Co3+ sites in Co3O4 with Zn and Al atoms. The Li-O-2 batteries based on ZnCo2O4 showed longer cycle life than that of CoAl2O4, suggesting that Co-Oh(3+) site is a relatively better geometric configuration than Co-Td(2+) site for Li-O-2 batteries.
Review
Chemistry, Physical
Xingzi Zheng, Mengwei Yuan, Yuelin Zhao, Zihan Li, Kefan Shi, Huifeng Li, Genban Sun
Summary: This paper summarizes the latest research progress in MXene-based materials in LOBs, highlighting the significance of high conductivity and surface functionalization strategies in the theoretical design and experimental modulation, which promote electrode reaction kinetics and cyclability of LOBs. It also outlines the prospects and challenges of MXene-based LOBs and proposes novel strategies to enhance battery performance, inspiring future progress in designing high-performance LOBs using MXene materials.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chang Chen, Yifan Li, Aijian Huang, Xuerui Liu, Jiazhan Li, Yu Zhang, Zhiqiang Chen, Zewen Zhuang, Yue Wu, Weng-Chon Cheong, Xin Tan, Kaian Sun, Zhiyuan Xu, Di Liu, Zhiguo Wang, Kebin Zhou, Chen Chen
Summary: Introducing a second metal species into M-N-C catalysts to construct DASs is an effective strategy. We developed a two-step specific adsorption strategy to construct FeCo-MHs catalyst and directly identified individual FeCo-MHs through in situ rotation. The FeCo-MHs catalyst exhibits exceptional ORR activity and can be used for high-performance cathodes in fuel cells and zinc-air batteries.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Jiachen Qiu, Yuran Lin, Shuting Zhang, Jie Ma, Yu Zhang, Mengwei Yuan, Genban Sun, Caiyun Nan
Summary: In this study, a series of hollow catalysts were synthesized based on the structure of cubic zeolitic imidazolate framework-67 (ZIF-67) through various chemical etching treatments. These hollow structures have larger surface areas and can expose more active sites, leading to improved performance of Li-O-2 batteries.
Article
Chemistry, Multidisciplinary
Binbin Jiang, Zhen Wang, Hui Zhao, Xie Wang, Xiaoxia Mao, Aijian Huang, Xuehua Zhou, Kui Yin, Kefa Sheng, Junwei Wang
Summary: This study successfully synthesized a Ru nanocluster catalyst anchored on boron- and nitrogen-doped carbon for the hydrogen evolution reaction (HER) in alkaline/seawater electrolytes. The catalyst exhibited outstanding activity and durability, delivering low overpotentials and high specific activity. Density functional theory calculation results showed that the formed interfacial chemical bond can facilitate water and hydrogen adsorption, contributing to the excellent HER performance in alkaline media.
Article
Chemistry, Applied
Donghua Guo, Mengwei Yuan, Xingzi Zheng, Miaomiao Li, Caiyun Nan, Genban Sun, Xianqiang Huang, Huifeng Li
Summary: By introducing metal molybdenum and designing a porous tubular structure of CoMo1-xP/Mo sulfur host, the conductivity and cycling stability of lithium-sulfur batteries can be improved, and the shuttle effect can be effectively inhibited, providing a new approach for the further design of high-performance cathode materials for lithium-sulfur batteries.
JOURNAL OF ENERGY CHEMISTRY
(2022)
