真空蒸镀法制备Sb膜电极及其性能

doi:10.3724/SP.J.1077.2012.11502

无机材料学报 ›› 2012, Vol. 27 ›› Issue (7): 746-750.DOI: 10.3724/SP.J.1077.2012.11502

真空蒸镀法制备Sb膜电极及其性能

李艳红, 邱新平, 刘源

(清华大学化学系, 有机光电子与分子工程教育部重点实验室, 北京100084)

收稿日期:2011-08-12 修回日期:2011-09-30 出版日期:2012-07-20 网络出版日期:2012-06-06
作者简介:李艳红(1979-), 女, 博士. E-mail: aiorange@126.com
基金资助:
国家重点基础研究发展规划项目(2009CB220100-G)

Characteristics of Sb Film Electrode Prepared by Vacuum Depositing

LI Yan-Hong, QIU Xin-Ping, LIU Yuan

(Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China)

Received:2011-08-12 Revised:2011-09-30 Published:2012-07-20 Online:2012-06-06
About author:LI Yan-Hong. E-mail: aiorange@126.com
Supported by:
Major State Basic Research Development Program (2009CB220100-G)

摘要/Abstract

摘要： 采用真空蒸镀法制备了金属Sb膜电极, 通过XRD、SEM、恒流充放电循环、循环伏安(CV)等方法, 研究了Sb膜电极的结构、形貌和电化学性能, 并对嵌脱锂机理进行了分析. 结果表明: 蒸镀后, 金属Sb为六方晶体, (003)晶面择优取向. Sb膜电极与基底铜箔的微观形貌接近, Sb金属以片层颗粒堆积在Cu箔颗粒上面. 在首次嵌锂过程中, 能观察到Li₃Sb合金的生成和Sb相的消失, 在脱锂之后, 能观察到Sb相的重新出现和Li₃Sb合金的消失, 且Sb相还是回复到(003)面择优相. Sb膜电极的首次充放电比容量分别为652和454 mAh/g, 循环16周后放电比容量还为300 mAh/g, 性能远优于Sb粉电极.

关键词: 锂离子电池, 负极, Sb膜, 电化学性能

Abstract: Vacuum depositing was employed to prepare antimony (Sb) film electrode as anode for lithium-ion batteries. The crystal structure, surface morphology, electrochemical properties and lithium insertion/ extraction characteristics of the so-obtained film electrode were investigated by XRD, SEM, constant current charge-discharge testing and CV. The results show that Sb film is obtained with a hexagonal structure and (003) preferred orientation. The morphology of Sb film is similar to that of Cu foil and Sb metal possesses a platelet shape. It can be observed that Li₃Sb alloy appears and Sb phase disappears during the first lithium insertion process, and Sb phase appeares and Li₃Sb alloy disappears reversibly during the lithium extraction process. The initial lithium insertion/ extraction specific capacity of Sb film can reach 652 and 454 mAh/g, respectively. And insertion specific capacity is 300 mAh/g after 16 cycles, which is larger than that of Sb powder electrode.

Key words: lithium-ion batteries, cathode, Sb film, electrochemical characteristics

中图分类号:

TM911

李艳红, 邱新平, 刘源. 真空蒸镀法制备Sb膜电极及其性能[J]. 无机材料学报, 2012, 27(7): 746-750.

LI Yan-Hong, QIU Xin-Ping, LIU Yuan. Characteristics of Sb Film Electrode Prepared by Vacuum Depositing[J]. Journal of Inorganic Materials, 2012, 27(7): 746-750.

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真空蒸镀法制备Sb膜电极及其性能

Characteristics of Sb Film Electrode Prepared by Vacuum Depositing

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