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 V2O5 cathode nanomaterial.By rapid quenching from high temperatures,Al ions are doped into V2O5 lattice(A1-V2O5)and abundant oxygen vacancies are formed on the surface/near-surface,which facilitate the desired rapid electron transfers.Our density functional theory(DFT)simula-tions elucidate that the doping of Al ions into V2O5 remarkably reduces the Zn2+-diffusion barriers and improves the electrical conductivity of V2O5.As a proof-of-concept application,the thus-optimized Al-V2O5 cathode delivers a superior specific capacity of 532 mAh g-1 at 0.1 A g-1 and a long-cycling life with 76％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 V2O5 to boost the Zn2+storage but also a general path-way of modifying metal oxides with improved electrochemical performance.

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

State Key Laboratory of Fine Chemicals,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China;Department of Materials Science and Engineering,National University of Singapore,Singapore 117574,Singapore;School of Physics and Energy,Xuzhou University of Technology,Xuzhou 221018,Jiangsu,China;School of Materials Science and Engineering,Tongji University,Shanghai 201804,China

能源化学

[1]Hanmei Jiang;Wenbin Gong;Yifu Zhang;Xin Liu;Moaz Waqar;Jingjing Sun;Yanyan Liu;Xueying Dong;Changgong Meng;Zhenghui Pan;John Wang-.Quench-tailored Al-doped V2O5 nanomaterials for efficient aqueous zinc-ion batteries)[J].能源化学,2022(07):52-58

Quench

tailored,doped,V2O5,nanomaterials,efficient,aqueous,zinc,batteries,Rechargeable,ZIBs,are,regarded,as,promising,competition,lithium,energy,devices,owing,their,high,safety,low,cost,However,development,performance,largely,hindered,by,shortage,ideal,cathode,capability,long,stability,Herein,address,this,bottleneck,issue,quenching,surface,chemistry,By,rapid,from,temperatures,into,lattice,A1,abundant,oxygen,vacancies,formed,near,which,facilitate,desired,electron,transfers,Our,density,functional,theory,DFT,simula,tions,elucidate,that,doping,remarkably,reduces,diffusion,barriers,improves,electrical,conductivity,proof,concept,application,thus,optimized,delivers,superior,specific,capacity,mAh,cycling,life,retention,after,cycles,well,good,This,work,provides,not,only,novel,strategy,tuning,boost,Zn2+storage,but,also,general,path,way,modifying,metal,oxides,improved,electrochemical

0.623032