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Design of a cationic accelerator enabling ultrafast ion diffusion kinetics in aqueous zinc-ion batteries

Journal of Energy Chemistry 2025年第1期100卷 377-384页

作者： Yawei Xiao Qianqian Gu Haoyu Li Mengyao Li Yude Wang National Center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan University Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources School of Chemistry and Chemical Engineering Hainan University College of Chemical Engineering Fuzhou University Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies Yunnan University

Aqueous zinc-ion batteries are highly favored for grid-level energy storage owing to their low cost and high safety,but their practical application is limited by slow ion *** address this,a strategy has been developed to create a cation-accelerating electric field on the surface of the cathode to achieve ultrafast Zn2+diffusion *** employing electrodeposition to coat MoS2on the surface of BaV6O16·3H2O nanowires,the directional built-in electric field generated at the heterointerface acts as a cation accelerator,continuously accelerating Zn2+diffusion into the active *** optimized Zn2+diffusion coefficient in CC@BaV-6O16·3H2O@MoS2(7.5×10～8cm2s-1) surpasses that of most reported V-based ***,MoS2serving as a cathodic armor extends the cycling life of the Zn-CC@BaV6O16·3H2O@MoS2full batteries to over 10000 *** work provides valuable insights into optimizing ion diffusion kinetics for high-performance energy storage devices.

关键词： Internal electric field Cationic accelerator ion diffusion kinetics Cathode modification strategy Aqueous zinc ion battery

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Constructing ultrastable electrode/electrolyte interface for rapid potassium ion storage capability via salt chemistry and interfacial engineering

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Nano Research 2022年第3期15卷 2083-2091页

作者： Sheng Wen Xin Gu Xiangwei Ding Li Zhang Pengcheng Dai Liangjun Li Dandan Liu Wenchao Zhang Xuebo Zhao Zaiping Guo College of New Energy State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580China Institute of Environmental Engineering School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083China Institute for Superconducting and Electronic Materials University of WollongongWollongongNSW 2522Australia School of Chemical Engineering&Advanced Materials The University of AdelaideAdelaideSA 5005Australia

Conversion/alloying anode materials exhibiting high K storage capacities suffer from large volume variations and unstable electrode/electrolyte interfaces upon ***,taking SnS/reduced graphene oxide(SnS/rGO)anodes as an example,the electrochemical performance of SnS/rGO could significantly be improved via employing potassium bis(fluorosulfonyl)imide(KFSI)salt in electrolytes and ultrathin TiO_(2) ***-rich inorganic layer was demonstrated to help form robust SEI layer,which could suppress the side reactions to increase the Coulombic *** formed potassiated K_(x)TiO_(2) coating layer was constructed to boost charge transfer capability and K-ion diffusion *** as-prepared SnS/rGO@TiO_(2)-20 electrode in KFSI electrolyte delivers the high CE of 99.1%and 424 mAh·g^(−1) after 200 cycles with an ultrahigh capacity retention of 98.5%.

关键词： potassium-ion batteries SnS/rGO nanocomposite salt chemistry ultrathin TiO_(2)coating ion diffusion kinetics

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Water molecules and oxygen-vacancy modulation of vanadium pentoxide with fast kinetics toward ultrahigh power density and durable flexible all-solid-state zinc ion battery

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Journal of Energy Chemistry 2023年第10期85卷 581-591,I0014页

作者： Wenda Qiu Yunlei Tian Shuting Lin Aihua Lei Zhangqi Geng Kaitao Huang Jiancong Chen Fuchun Huang Huajie Feng Xihong Lu Guangdong Industry Polytechnic College Guangzhou 510300GuangdongChina MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry KLGHEI of Environment and Energy ChemistrySchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275GuangdongChina Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province Hainan Normal UniversityHaikou 571158HainanChina

Aqueous zinc ion battery(ZIB)with many virtues such as high safety,cost-effective,and good environmental compatibility is a large-scale energy storage technology with great application ***,its application is severely hindered by the slow diffusion of zinc ions in desirable cathode ***,a technique of water-incorporation coupled with oxygen-vacancy modulation is exploited to improve the zinc ions diffusion kinetics in vanadium pentoxide(V_(2)O_5)cathode for *** incorporated water molecules replace lattice oxygen in V_(2)O_5,and function as pillars to expand interlayer *** the structural stability can be enhanced,and the zinc ions diffusion kinetics might also be promoted during the repeated intercalation/***,the lattice water molecules can effectively enhance conductivity due to the electronic density modulation ***,the modulated V_(2)O_5(H-V_(2)O_5)cathode behaves with superior rate capacity and stable durability,achieving 234 mA h g^(-1)over 9000 cycles even at 20 A g^(-1).Furthermore,a flexible all-solid-state(ASS)ZIB has been constructed,exhibiting an admirable energy density of 196.6 Wh kg^(-1)and impressive power density of 20.4 kW kg^(-1)as well as excellent long-term ***,the assembled flexible ASS ZIB would be able to work in a large temperature span(from-20 to 70℃).Additionally,we also uncover the energy storage mechanism of the H-V_(2)O_5 electrode,offering a novel approach for creating high-kinetics cathodes for multivalent ion storage.

关键词： Interlayer engineering Water intercalation Vanadium pentoxide ion diffusion kinetics Zinc ion battery

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Morphology mediation of MoS_(2) nanosheets with organic cations for fast sodium ion storage

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Chinese Chemical Letters 2021年第2期32卷 880-884页

作者： Jinjin Li Congcong Liu Jingjiang Wei Yuantao Yan Xiaoli Zhao Xiaowei Yang School of Materials Science and Engineering Tongji University.Shanghai 201804China

ion diffusion kinetics,depending on the size,tortuosity,connectivity of the channels,greatly affects the rate performance of the ***-dimensional materials(2DMs) has emerged as promising electrode materials in the past *** r,the applications of 2DMs electrodes are limited by the strong restacking problem,which leads to a poor rate *** this work,we for the first time mediated the mo rphology of molybdenum disulfide(MoS_(2)) nanosheets via a facile coagulation method;abundant sheet crumples were induced,which greatly enhance their surface accessibility and thus benefit the ion diffusion ***,the crumpled-MoS_(2) electrodes follow a capacitive Na-ion charge-storage mechanism to a large ***,we demonstrate the special role of organic cations in the inter-sheet assembly configuration,in sharp contrast with that of alkali/alkaline-earth *** propose that organic cations cause edge/face contact of the sheets,instead of the face/face contact,thus affording a house-of-cards structure.

关键词： ion diffusion kinetics Crumpled MoS_(2)nanosheets Anti-restacking Organic cations Na-ion storage

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