Low-temperatures synthesis of CuS nanospheres as cathode material for magnesium second batteries  

作　　者：Qin Zhang Yaobo Hu Jun Wang Fusheng Pan 

机构地区：[1]College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China [2]National Engineering Research Center for Magnesium Alloys,Chongqing 400044,China

出　　处：《Journal of Magnesium and Alloys》2023年第1期192-200,共9页镁合金学报（英文）

基　　金：the support from the Fundamental Research Funds for the Central Universities of Chongqing University(No.2020CDCGCL005)。

摘　　要：Rechargeable magnesium batteries(RMBs),as one of the most promising candidates for efficient energy storage devices with high energy,power density and high safety,have attracted increasing attention.However,searching for suitable cathode materials with fast diffusion kinetics and exploring their magnesium storage mechanisms remains a great challenge.Cu S submicron spheres,made by a facile low-temperature synthesis strategy,were applied as the high-performance cathode for RMBs in this work,which can deliver a high specific capacity of 396mAh g^(-1)at 20 mA g^(-1) and a remarkable rate capacity of 250 m Ah g^(-1)at 1000 mA g^(-1).The excellent rate performance can be assigned to the nano needle-like particles on the surface of Cu S submicron spheres,which can facilitate the diffusion kinetics of Mg^(2+).Further storage mechanism investigations illustrate that the Cu S cathodes experience a two-step conversion reaction controlled by diffusion during the electrochemical reaction process.This work could make a contribution to the study of the enhancement of diffusion kinetics of Mg2+and the reaction mechanism of RMBs.

关 键 词：Magnesium second batteries Cathode material CUS Submicron spheres Low-temperature synthesis. 

分 类 号：TG146[一般工业技术—材料科学与工程]