Amorphous Ni-Co-S nanocages assembled with nanosheet arrays as cathode for high-performance zinc ion battery  

作　　者：Na Li Guangmeng Qu Xixi Zhang Shunshun Zhao Chenggang Wang Gang Zhao Peiyu Hou Xijin Xu 

机构地区：[1]School of Physics and Technology,University of Jinan,Ji’nan 250022,China [2]Key Laboratory of Colloid and Interface Chemistry Ministry of Education School of Chemistry and Chemical Engineering,Shandong University,Ji’nan 250100,China [3]School of Electronic and Information Engineering(Department of Physics),Qilu University of Technology(Shandong Academy of Sciences),Ji’nan 250353,China

出　　处：《Chinese Chemical Letters》2022年第6期3272-3276,共5页中国化学快报（英文版）

基　　金：the Independent Cultivation Program of Innovation Team of Ji’nan City(No.2019GXRC011);National Natural Science Foundation of China(No.51802177);Natural Science Foundation of Shandong Province(No.ZR2020QE062)。

摘　　要：The selection and development of cathode of alkaline zinc batteries(AZBs)is still hindered and often leads to poor rate capability and short cycle life.Here,amorphous hollow nickel-cobalt-based sulfides nanocages with nanosheet arrays(AM-NCS)are designed and constructed with ZIF-67 as the selftemplate to exchange with Ni^(2+) and S^(2-) by using a two-step ion exchange method.The synthesized AM-NCS possess the high specific capacity(160 m Ah/g at 2 A/g),and the assembled battery has excellent rate performance(146 m Ah/g reversible capacity at 5 A/g).The assembled device has excellent rate performance(155 m Ah/g at 2 A/g)and long cycling stability(7000 cycles,62.5%of initial capacity).The excellent electrochemical properties of the electrode materials are mainly attributed to the unique structure,in particular,polyhedron structure with hollow structure can improve the cyclic stability,and the amorphous structure can expose more reactive sites on the surfaces of nickel,cobalt and sulfur.This work provides a new strategy for the design and fabrication of high performance cathode materials for AZBs.

关 键 词：Alkaline zinc batteries Metal sulfide Hierarchical structures Amorphous structure Hollow structure 

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