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Revista mexicana de física
versión impresa ISSN 0035-001X
Rev. mex. fis. vol.53 supl.1 México ene. 2007
Electrochemical characteristics of Si/Mo multilayer anode for Li ion batteries
MyungHoon Kima, YoungJae Kima, JungYeul Kimb, YouKi Leeb, J.A. Ascencioc, and JongWan Parka,
a Division of Materials Science and Engineering, Hanyang University, 17 HaengdangDong, SeongdongGu, Seoul 133791, Korea.
e mail:myung97@ihanyang.ac.kr , kim0jae@ihanyang.ac.kr
b Division of Semiconductor and Electronics Engineer, Uiduk University, 50 YukumLi KangdongMyun, KyoungjuSi, KoungsangbukDo, 780713 Korea.
e mail: jykim@uu.ac.kr, leeyk@uu.ac.kr
c Programa de Investigación y Desarrollo de Ductos, Instituto Mexicano del Petróleo.
e mail: jascencio@yahoo.com
* Corresponding Author:
email : jwpark@hanyang.ac.kr,
Tel : +82222200386, Fax: +82222982850
Recibido el 9 de junio de 2006
Aceptado el 27 de septiembre de 2006
Abstract
We have prepared the Si/Mo multilayer by alternate deposition with a multigun rf/dc magnetron sputtering system. A current collector was Cu foil that had a rough surface. Pretreatment with plasma on the surface was performed in order to improve adhesion between an electrode and substrate and to remove contamination on the surface. The structural and electrochemical characteristics of yhe Si/Mo multilayer were investigated. The initial capacity of the Si thin film rapidly degraded after 40 cycles, whereas the multilayer maintained more than 90 % of the initial capacity (2653 mAhg1) after 100 cycles.
Keywords: Silicon; molybdenum, multilayer; anode; Li ion secondary battery.
Resumen
Se prepararon las multiples capas de Si/Mo por deposición alternada mediante un sistema de erosión catódica de magnetrón rf/dc de múltiples canones. Un colector de corriente era la lámina de Cu de superficie áspera. Se realizó el pretratamiento con plasma en la superficie para mejorar la propiedad de adherencia entre electrodo y sustrato y para eliminar contaminación de la superficie. Se investigaron las características estructurales y electroquímicas de las multicapas de Si/Mo. La capacidad inicial de la película delgada de Si degrado rápidamente después de 40 ciclos mientras que las multicapas mantuvieron más del 90% de la capacidad inicial (2653 mAhg-1) después de 100 ciclos.
Descriptores: Silicio; molibdeno; multicapas; anodo; batería secundaria Liion.
PACS: 82.45.h; 82.47.Aa
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