玉米叶状Cu_(2)O/Cu负极的制备及其电化学性能  

Synthesise and Electrochemical Properties of Corn-leaf-shaped Cu_(2)O/Cu Anod

作　　者：孔建柱 王昕璐 王进贤[1] KONG Jian-zhu;WANG Xin-lu;WANG Jin-xian(School of Chemistry&Environmental Engineering,Changchun University of Science and Technology,Changchun 130022)

机构地区：[1]长春理工大学化学与环境工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2021年第4期90-96,共7页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：吉林省自然科学基金项目(20170101128JC)。

摘　　要：采用阳极氧化法及后续高温煅烧制备了三维微纳玉米叶状Cu_(2)O/Cu锂离子电池负极材料。利用X射线衍射、扫描电子显微镜对产物的物相组分、晶体结构和形貌进行了系统表征;利用电化学工作站、电池性能测试系统对制备的电极材料进行电化学性能的分析和计算。结果表明,铜箔表面被均匀刻蚀了一层玉米叶状Cu_(2)O,长度约为100~200 nm,宽度约为30 nm;玉米叶状Cu_(2)O/Cu作为锂离子电池负极材料,在电流密度为100 mAhg-1经过200次充/放电循环后,该负极材料的可逆放电比容量仍高达848.6 mAhg-1:电化学交流阻抗谱图拟合和计算的结果表明三维微纳玉米叶状Cu_(2)O/Cu电极材料具有更低的电荷传质电阻和更好的锂离子固相扩散能力。The anode material of three-dimensional micro-nano corn-leaf-shaped Cu_(2)O/Cu lithium ion battery was prepared by anodizing method and subsequent high-temperature calcination.The structure and morphology of the product were characterized by X-ray diffraction and scanning electron microscope.The product electrochemical performance was characterized by constant current charge and discharge and EIS test,analysis and calculation.The results showed that the surface of the copper foil was uniformly etched with a layer of corn-leaf-shaped Cu_(2)O;with a length of about 100~200 nm and a width of about 30 nm.Corn-leaf-shaped Cu_(2)O/Cu was used as a lithium ion battery anode material.After 200 charge/discharge cycles under the current density 100 mAhg-1,the reversible discharge specific capacity of the anode material was still as high as 848.6 mAhg-1.The EIS fitting and calculation results showed that the three-dimensional micro-nano corn-leaf-shaped Cu_(2)O/Cu electrode material had lower charge transfer resistance and better lithium ion solid phase diffusion ability.

关 键 词：阳极氧化法 玉米叶状结构 Cu_(2)O 电化学性能 

分 类 号：TQ152[化学工程—电化学工业]