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EN06.12.05 : In Situ Fabricated Carbon-Polyimide Hybrid Film Providing Mechanical and Electrical Robust Network for LIB Silicon Anode

5:00 PM–7:00 PM Apr 5, 2018 (America - Denver)

PCC North, 300 Level, Exhibit Hall C-E

Description
Hyunwoo Cho1 KyungSu Kim1 Cheol-Min Park2 Goojin Jeong1

1, Korea Electronics Technology Institute, Seongnam, , Korea (the Republic of)
2, Kumoh National Institute of Technology, Gumi, , Korea (the Republic of)

Engineering of composite electrode for silicon anode materials plays an important role in the practical application of Si-based lithium-ion batteries (LIB). In this work, a hybrid composite anode of silicon-carbon-polyimide was in-situ fabricated by proper heat treatment of the slurry coat containing silicon power and polyamic acid polymer, without any carbon agent. The resulted film shows three components (silicon-carbon-polymer) composite structure wherein the hybrid carbon-polyimide is in-situ generated from polyamic acid by proper heat treatment. The hybrid Si composite exhibits robust binding and conductive properties, and also meso/macroporous internal structure enabling it to buffer Si volume expansion. When applied as LIB anode, it deliveres promising battery performance with little volume change even under high content of Si (>96wt%), which implies that the in-situ fabricatoin method could be another effective way for Si anode engineering for high energy density LIB.

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