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Accelerated ion/electron transport kinetics and increased active sites via local internal electric fields in heterostructured VO_(2)–carbon cloth for enhanced zinc-ion storage

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Nano Research 2023年第1期16卷 503-512页

作者： Ping Luo Wenwei Zhang Wanyue Cai Zhen Huang Gangyuan Liu Chang Liu Shiyu Wang Feng Chen Lixue Xia Yan Zhao Shijie Dong Lu Xia Hubei Provincial Key Laboratory of Green Materials for Light Industry Hubei Engineering Laboratory of Automotive Lightweight Materials and ProcessingNew Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base School of Materials and Chemical EngineeringHubei University of TechnologyWuhan 430068China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Wuhan Polytechnic University Wuhan 430023China

Although the performance of the self-standing electrode has been enhanced for aqueous zinc-ion batteries(AZIBs),it is necessary to explore and analyse the deep modification mechanism(especially interface effects).Herein,density functional theory(DFT)calculations are applied to investigate the high-performance cathode based on the VO_(2)/carbon cloth composites with heterostructures interface(H-VO_(2)@CC).The adsorption energy comparisons and electron structure analyses verify that HVO_(2)@CC has extra activated sites at the interface,enhanced electrical conductivity,and structural stability for achieving highperformance AZIBs due to the presence of built-in electric field at the ***,the designed self-standing HVO_(2)@CC cathode delivers higher rate capacity,longer-life cyclability,and faster electronic/ion transmission kinetics benefiting from the synergistic *** risks of active material shedding and dissolution during the dis/charge process of two cathodes were evaluated via ex-situ ultraviolet–visible(UV–vis)spectrum and inductively coupled plasma-atomic emission spectroscopy(ICP-AES)***,this investigation also explores the charge storage mechanism of H-VO_(2)@CC through various exsitu and in-situ characterization *** finding can shed light on the significant potential of heterostructures interface engineering in practical applications and provide a valuable direction for the development of cathode materials for AZIBs and other metal-ion batteries.

关键词： aqueous zinc ion battery heterostructures interface built-in electric field VO_(2)(B) density functional theory

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