Electrochemical Impedance Spectroscopy Study on Effects of Temperature on the Lithiation Process of 3-Dimensional  

Porous Cu6Sn5 Alloy Electrode

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (4): 934.

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Electrochemical Impedance Spectroscopy Study on Effects of Temperature on the Lithiation Process of 3-Dimensional Porous Cu6Sn5 Alloy Electrode

FAN Xiao-Yong^1,2*, WANG Jing-Jing¹, LI Yan¹, CAO Gui-Ming¹, SHI Xiao-Yuan¹, HUANG Ling², SUN Shi-Gang^2*, LI Dong-Lin¹

1. School of Materials Science and Engineering, Chang′an University, Xi′an 710061, China;
2. State Key Lab of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

Received:2010-07-02 Revised:2010-10-08 Online:2011-04-10 Published:2011-03-09
Contact: FAN Xiao-Yong,SUN Shi-Gang E-mail:xyfan@chd.edu.cn;sgsun@xmu. edu. cn
Supported by:
国家自然基金青年科学基金(批准号: 20903016)、长安大学“中央高校基本科研业务费专项资金”项目(批准号: CHD2009JC034)、高等学校科技创新工程重大项目培育资金项目(批准号: 708084)和国家“九七三”计划项目(批准号: 2009CB220102)资助.

Abstract

Abstract: Porous Cu was fabricated by electrodepositing using hydrogen bubbles as the dynamic template, and subsequently treated by annealing to increase the structural stability. The 3-dimentional porousCu6Sn5 alloy electrode was prepared by electrodepositing using the porous Cu as the substrate. The lithiation/delithiation potentials of 3-dimentional porousCu6Sn5 were investigated by cyclic voltammetry. The initial lithiation process of 3-dimentional porous Cu6Sn5 alloy electrode at different temperature was studied by electrochemical impedance spectroscopy. The results indicate that the Nyquist plots are composed of three regions in the main lithiation range: high frequency arc representing solid electrolyte interphase (SEI) impedance, middle frequency arc representing charge transfer impedance, and low frequency arc representing phase transformation impedance. The change principles of the electrochemical impedance versus temperature were analyzed by simulating the experimental data using appropriate equivalent circuit.

Key words: Lithium-ion battery, Anode, 3-dimensional porous, Cu6Sn5 alloy electrode, Electrochemical impedance spectroscopy

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FAN Xiao-Yong*, WANG Jing-Jing, LI Yan, CAO Gui-Ming, SHI Xiao-Yuan, HUANG Ling, SUN Shi-Gang*, LI Dong-Lin. Electrochemical Impedance Spectroscopy Study on Effects of Temperature on the Lithiation Process of 3-Dimensional Porous Cu6Sn5 Alloy Electrode[J]. Chem. J. Chinese Universities, 2011, 32(4): 934.

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Electrochemical Impedance Spectroscopy Study on Effects of Temperature on the Lithiation Process of 3-Dimensional Porous Cu6Sn5 Alloy Electrode

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