三维海胆状多孔复合结构铜/氧化铜/二氧化锡/碳复合电极的制备及储锂性能的研究  

Study on Fabrication and Lithium Storage Properties of Three-dimensional Sea Urchin-like Porous Composite Copper/Copper Oxide/Tin Dioxide/Carbon Composite Electrode

作　　者：成朋 刘文博[1] 龙佳俊 董鑫 陈雪 向鹏 CHENG Peng;LIU Wenbo;LONG Jiajun;DONG Xin;CHEN Xue;XIANG Peng(School of Mechanical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学机械工程学院,四川成都610065

出　　处：《热加工工艺》2021年第2期72-75,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51604177);四川省国际科技合作与交流计划项目(2017HH0068)。

摘　　要：以三维纳米多孔铜为基底,采用水浴法,使锡基金属有机物框架原位嵌入生长在其表面的孔隙中,然后进行热处理,最终制得铜/氧化铜/二氧化锡/碳复合电极。采用SEM、XRD、EDX等测试方法表征了电极结构并进行了电化学性能测试。结果表明,氧化铜膜是由三维纳米多孔铜表面部分氧化形成的连续膜,碳包裹的二氧化锡嵌入在多孔基底的孔隙中。这种复合电极在电流密度为1 m A/cm2电流密度条件下首次充电比容量达到4.8 m Ah/g;在循环120周后,可逆比容量保持在2.2 m Ah/g,容量保持率达到了45.9%。The three-dimensional nano porous copper was used as a substrate, and a water bath method was adopted, so that the organic framework of the tin-based metal was embedded in the pores of the substrate surface in situ. Then the copper/copper oxide/tin dioxide/carbon composite electrode was prepared by heat treatment. Electrode structure was characterized by SEM, XRD and EDX and electrochemical properties were tested. The results show that, the copper oxide film is a continuous film formed by the partial oxidation of the three-dimensional nanoporous copper surface. The carbon-coated tin dioxide is embedded in the pores of the porous substrate. The composite electrode has a first charging specific capacity of 4.8 m Ah/g under a current density of 1 m A/cm2. After 120 cycles, the reversible specific capacity is kept at 2.2 m Ah/g, and the capacity retention rate reaches 45.9%.

关 键 词：锂离子电池 金属有机物框架 氧化铜 二氧化锡 负极 

分 类 号：TB333.12[一般工业技术—材料科学与工程] TG113.224[金属学及工艺—物理冶金]