Electrochemical relation with expansion behavior in in-situ load cell system for anode material
Si-based material is one of the promising candidates for high capacitive electrode in Li rechargeable batteries. It is well-known that the critical drawback of Si-based material is the remarkable volume change during the reaction. In-situ load cell systems have been used for Si-based electrode swelling during electrochemical cycling. The specially designed pouch-type cell has been adopted for load cell experiment during electrochemical reaction. We have investigated the thickness changes occurring during charge/discharge cycles for load cell employing Si based anode electrodes. The considerable thickness hysteresis of at least 10％ of initial thickness was observed during the first charge. After the first cycle, the thickness fluctuates reversibly with peaks reached at full charge. The amplitude of the fluctuation seems to be dictated by the type of Si anode materials and battery structure. Consequently, the several physico-chemical parameters in practical cell system has been derived from examining the effects of loading pressure and other electrochemical factors on electrochemical and physical properties of porous electrode.
Sung-Soo Kim
Energy R&D center, Samsung SDI Co. Ltd 575, Shin-Dong, Yeongtong-Gu, Suwon-Si, Kyonggi-Do, 443-731, South of Korea
国际会议
深圳
英文
7-9
2007-01-17（万方平台首次上网日期，不代表论文的发表时间）