| 학회 |
한국고분자학회 |
| 학술대회 |
2014년 봄 (04/10 ~ 04/11, 대전 컨벤션센터) |
| 권호 |
39권 1호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Surface coverage-tunable, multifunctional semi-interpenetrating polymer network-nanoshelled high voltage cathode materials for LIBs |
| 초록 |
Surface coverage-tunable, multifunctional conformal layer based on semi-interpenetrating polymer network(semi-IPN) nanoshell is presented as a new concept of interface engineering for lithium-ion cathode materials. This unusual semi-IPN nanoshell is composed of thermally-cured polyimide(PI) and polyvinyl pyrrolidone(PVP) and also exhibits well-adjusted polarity matching with cathode materials (here, LiCoO2(LCO) powders are chosen as a model system). This structural feature allows the PI/PVP semi-IPN nanoshell effectively suppresses direct exposure of LCO to liquid electrolytes. In addition, the presence of pyrrolidone ring bearing Lewis basic site enables the PI/PVP semi-IPN nanoshell to effectively trap hydrofluoric acid that poses as a critical threat to trigger unwanted side reactions in cells. Owing to the aforementioned combined effects, the PI/PVP semi-IPN nanoshell significantly improves cell performance and thermal stability of high-voltage charged LCO. |
| 저자 |
김주명1, 박창훈1, 박장훈1, 이창기2, 이상영1
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| 소속 |
1울산과학기술대, 2한국 생산기술(연) |
| 키워드 |
Li ion battery; high voltage cathode; semi-IPN
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| E-Mail |
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