Copper-induced formation of heterostructured Co_(3)O_(4)/CuO hollow nanospheres towards greatly enhanced lithium storage performance  

作　　者：Junjun Zhang Huiying Lu Tianhao Yao Xin Ji Qingmiao Zhang Lingjie Meng Jianmin Feng Hongkang Wang 

机构地区：[1]College of Geography & Environment,Xianyang Normal University,Xianyang 712000,China [2]State Key Lab of Electrical Insulation and Power Equipment,Center of Nanomaterials for Renewable Energy (CNRE),School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China [3]School of Chemistry,Xi'an Key Laboratory of Sustainable Energy Material Chemistry,and Instrumental Analysis Center,Xi'an Jiaotong University,Xi'an 710049,China

出　　处：《Chinese Chemical Letters》2024年第2期594-598,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52077175).

摘　　要：We report a facile template-free fabrication of heterostructured Co_(3)O_(4)/CuO hollow nanospheres using pre-synthesized Co/Cu-glycerate as conformal precursor.The introduction of copper nitrate in the solvothermal reaction system of glycerol/isopropanol/cobalt nitrate readily induces the conversion from solid Co-glycerate to hollow Co/Cu-glycerate nanospheres,and the effect of the Co/Cu atomic ratio on the structure evolution of the metal glycerates as well as their corresponding oxides were investigated.When examined as anode materials for lithium-ion batteries,the well-defined Co_(3)O_(4)/CuO hollow nanospheres with Co/Cu molar ratio of 2.0 demonstrate excellent lithium storage performance,delivering a high reversible capacity of 930 mAh/g after 300 cycles at a current density of 0.5 A/g and a stable capacity of 650 mAh/g after 500 cycles even at a higher current density of 2.0 A/g,which are much better than their counterparts of bare CuO and Co_(3)O_(4).The enhanced lithium storage performance can be attributed to the synergistic effect of the CuO and Co_(3)O_(4)heterostructure with hollow spherical morphology,which greatly enhances the charge/electrolyte transfer and effectively buffers the volume changes upon lithiation/delithiation cycling.

关 键 词：Lithium-ion batteries Co/Cu-glycerate Hollow nanospheres Co_(3)O_(4)/CuO heterostructure Electrochemical properties 

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]