S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Journal Papers (저널논문_화학생물공학부)
Failure Modes of Silicon Powder Negative Electrode in Lithium Secondary Batteries
- Ryu, Ji Heon; Kim, Jae Woo; Sung, Yung-Eun; Oh, Seung M.
- Issue Date
- Electrochemical Society
- Electrochem. Solid-State Lett., 7, A306 (2004)
- Si composite negative electrodes for lithium secondary batteries degrade in the dealloying period with an abrupt increase in
internal resistance that is caused by a breakdown of conductive network made between Si and carbon particles. This results from
a volume contraction of Si particles after expansion in the previous alloying process. Due to the large internal resistance, the
dealloying reaction is not completed while Si remains as a lithiated state. The anodic performance is greatly improved either by
applying a pressure on the cells or loading a larger amount of conductive carbon in the composite electrodes.
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