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Effect of overcharge on lithium-ion cells: Silicon/graphite anodes...

Publication Type
Journal
Journal Name
Journal of Power Sources
Publication Date
Page Numbers
73 to 81
Volume
432

Small pouch cells containing Si/graphite electrodes were systematically charged to 100, 120, 140, 160, 180 and 250% state of charge. Characterization of the Si/graphite electrode after the overcharge showed some features similar to those found in a pure graphite electrode. Since the amount of silicon in the electrode was ∼15 wt%, this was not unexpected. The effect of silicon was seen in the composition of the SEI layer and the trends in two components of the SEI layer.