高等学校化学学报2011，Vol.32Issue(4)：934-938,5.
电化学阻抗谱法研究温度对三维多孔Cu6Sn5合金电极嵌锂过程的影响
Electrochemical Impedance Spectroscopy Study on Effects of Temperature on the Lithiation Process of 3-Dimensional Porous Cu6Sns Alloy Electrode
摘要
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-dimensional porous Cu6Sn5 alloy electrode was prepared by electrodepositing using the porous Cu as the substrate. The lithiation/delithiation potentials of 3-dimensional porous Cu6Sn5 were investigated by cyclic voltammetry. The initial lithiation process of 3-dimensional 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 represents solid electrolyte interphase(SEI) impedance, middle frequency arc represents charge transfer impedance, and low frequency arc represents phase transformation impedance.The variation of the electrochemical impedance versus temperature was analyzed by simulating the experimental data using appropriate equivalent circuit.关键词
锂离子电池/负极/三维多孔Cu6Sn5合金电极/电化学阻抗谱Key words
Lithium-ion battery/ Anode/ 3-Dimensional porous Cu6Sn5 alloy electrode/ Electrochemical impedance spectroscopy分类
化学化工引用本文复制引用
樊小勇,王晶晶,李严,曹桂铭,史晓媛,黄令,孙世刚,李东林..电化学阻抗谱法研究温度对三维多孔Cu6Sn5合金电极嵌锂过程的影响[J].高等学校化学学报,2011,32(4):934-938,5.基金项目
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. （批准号:20903016）
