Quench-tailored Al-doped V_(2)O_(5) nanomaterials for efficient aqueous zinc-ion batteries  

作　　者：Hanmei Jiang Wenbin Gong Yifu Zhang Xin Liu Moaz Waqar Jingjing Sun Yanyan Liu Xueying Dong Changgong Meng Zhenghui Pan John Wang 

机构地区：[1]State Key Laboratory of Fine Chemicals,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China [2]Department of Materials Science and Engineering,National University of Singapore,Singapore 117574,Singapore [3]School of Physics and Energy,Xuzhou University of Technology,Xuzhou 221018,Jiangsu,China [4]School of Materials Science and Engineering,Tongji University,Shanghai 201804,China

出　　处：《Journal of Energy Chemistry》2022年第7期52-58,I0003,共8页能源化学（英文版）

基　　金：partially supported by the National Natural Science Foundation of China(Grant Nos.21771030,12004324);the Guangdong Basic and Applied Basic Research Foundation(2019A1515110859);the support by MOE,Singapore Ministry of Education(MOE2018-T2-295,Singapore),for research of this work conducted at the National University of Singapore;the financial support from China Scholarship Council(CSC No.202006060158)。

摘　　要：Rechargeable aqueous zinc-ion batteries(ZIBs)are regarded as a promising competition to lithium-ion batteries as energy storage devices,owing to their high safety and low cost.However,the development of high-performance ZIBs is largely hindered by the shortage of ideal cathode materials with high-rate capability and long-cycle stability.Herein,we address this bottleneck issue by the quenching-tailored surface chemistry of V_(2)O_(5) cathode nanomaterial.By rapid quenching from high temperatures,Al ions are doped into V_(2)O_(5) lattice(Al-V_(2)O_(5))and abundant oxygen vacancies are formed on the surface/nearsurface,which facilitate the desired rapid electron transfers.Our density functional theory(DFT)simulations elucidate that the doping of Al ions into V_(2)O_(5) remarkably reduces the Zn^(2+)-diffusion barriers and improves the electrical conductivity of V_(2)O_(5).As a proof-of-concept application,the thus-optimized AlV_(2)O_(5) cathode delivers a superior specific capacity of 532 m Ah g^(-1) at 0.1 A g^(-1) and a long-cycling life with76%capacity retention after 5000 cycles,as well as a good rate performance.This work provides not only a novel strategy for tuning the surface chemistry of V_(2)O_(5) to boost the Zn^(2+)storage but also a general pathway of modifying metal oxides with improved electrochemical performance.

关 键 词：Quenching-tailored V_(2)O_(5) Aqueous zinc-ion batteries Surface chemistry Long-cycle stability High-rate capability 

分 类 号：TQ135.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]