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Engineered nitrogen doping on VO_(2)(B)enables fast and reversible zinc-ion storage capability for aqueous zinc-ion batteries

查看全文 作　　者：Xin [1]Gu;Juntao [1]Wang;Xiaobin [1]Zhao;Xin [1]Jin;Yuzhe [1]Jiang;Pengcheng [1]Dai;Nana [2]Wang;Zhongchao [3]Bai;Mengdi [1]Zhang;Mingbo [1]Wu 高影响力作者 机构地区：[1]College of New Energy,State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao 266580,Shandong,China;[2]Institute for Superconducting and Electronic Materials,Australian Institute for Innovative Materials,University of Wollongong Innovation Campus,North Wollongong,New South Wales 2500,Australia;[3]Institute of Energy Materials Science(IEMS),University of Shanghai for Science and Technology,Shanghai 200093,China高影响力机构 出　　处：《Journal of Energy Chemistry》索引2023年第10期,共10页高影响力期刊 基　　金：supported from the Natural Science Foundation of Shandong Province(ZR2022MB088);the National Natural Science Foundation of China(22138013);the Taishan Scholar Project(ts201712020);the Innovation and Entrepreneurship Training Program for college students of the China University of Petroleum(East China)(202207011)。 摘　　要：Vanadium-based compounds with high theoretical capacities and relatively stable crystal structures are potential cathodes for aqueous zinc-ion batteries(AZIBs).Nevertheless,their low electronic conductivity and sluggish zinc-ion diffusion kinetics in the crystal lattice are greatly obstructing their practical application.Herein,a general and simple nitrogen doping strategy is proposed to construct nitrogen-doped VO_(2)(B)nanobelts(denoted as VO_(2)-N)by the ammonia heat treatment.Compared with pure VO_(2)(B),VO_(2)-N shows an expanded lattice,reduced grain size,and disordered structure,which facilitates ion transport,provides additional ion storage sites,and improves structural durability,thus presenting much-enhanced zinc-ion storage performance.Density functional theory calculations demonstrate that nitrogen doping in VO_(2)(B)improves its electronic properties and reduces the zinc-ion diffusion barrier.The optimal VO_(2)-N400 electrode exhibits a high specific capacity of 373.7 mA h g^(-1)after 100 cycles at 0.1 A g^(-1)and stable cycling performance after 2000 cycles at 5 A g^(-1).The zinc-ion storage mechanism of VO_(2)-N is identified as a typical intercalation/de-intercalation process. 关 键 词：Vanadium dioxide Nitrogen doping Cathode materials Aqueous zinc-ion batteries
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