Copper oxide-modified highly reversible Zn powder anode for aqueous Zn metal batteries  

作　　者：Guan-Qun Liu Biao Fu Zhe-Xuan Liu Lan-Yan Li Shu-Quan Liang Guo-Zhao Fang 

机构地区：[1]School of Materials Science and Engineering,Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province,Central South University,Changsha 410083,China [2]School of Science,Hunan University of Technology and Business,Changsha 410205,China [3]National Energy Metal Resources and New Materials Key Laboratory,Central South University,Changsha 410083,China

出　　处：《Rare Metals》2024年第10期5005-5016,共12页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.52072411);the Central South University Innovation-Driven Research Programme(No.2023CXQD038)。

摘　　要：With the advantages of mature preparation technology,structural adjustability and suitability for large-scale application,Zn powder anode is considered to be an ideal electrode for realizing low-cost,high-energy-density aqueous Zn metal batteries.However,the high specific surface of Zn powders leads to severe side reactions such as hydrogen evolution and corrosion,thus limiting their widespread use Here,this work develops a novel CuO@Zn powder anode with a synergy effect of surface wrapping and compositing.Zn powders are uniformly wrapped by small CuO particles due to the strong adsorption between Zn and CuO.The wrapped CuO particles build a good conductive framework to inhibit the structural collapse of the Zn powder caused by corrosion and non-uniform deposition.Meanwhile,CuO can also be used as a seed to guide the uniform deposition of Zn ions through its strong binding energy with Zn.As a result,the Cu O@Zn anode can maintain a long cyclic life of 900 h at current density of 1 mA·cm^(-2)and capacity of 1 mAh·cm^(-2),as well as contribute to an excellent capacity retention of 92% after 800cycles for CuO@Zn||NH_(4)V_(4)O_(10)full cell.Even at high current density of 5 A·g^(-1),the full cell exhibits a specific capacity of more than 200 mAh·g^(-1)after 800 cycles,with a good capacity retention of 89%.This work provides a new idea for developing high-performance Zn powder-based anodes.

关 键 词：Zn powder Copper oxide Surface wrapping Zn anode Aqueous Zn metal batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] TB34[一般工业技术—材料科学与工程]