| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 봄 (04/04 ~ 04/06, 대전컨벤션센터) |
| 권호 |
43권 1호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Application of Polyimide as a Binder for High-Voltage Cathode of Lithium-ion Batteries |
| 초록 |
Li-rich layered oxide is a promising high-capacity cathode material for high-energy batteries, whose charge voltage is above 4.6 V. However, Li. Li-rich layered oxide cathode suffers from a rapid capacity fade during the high-voltage cycling caused by instable cathode-electrolyte interface, and structural degradation. Herein, we report the development of polyimide as a novel high-voltage binder, which mitigates the cathode degradation problems through superior binding ability to conventional PVDF binder and the formation of robust surface structure at the cathode. A full-cell consisting of fluorinated polyimide binder-assisted Li-rich layered oxide cathode without any electrolyte additive exhibits significantly improved capacity retention to 89 % at the 100th cycle and discharge capacity to 223−198 mAhg−1 even under the harsh condition of 55 ○C and high charge voltage of 4.7 V, in contrast to a rapid performance fade of the cathode coated with PVDF binder. |
| 저자 |
조재영1, 김관수1, Hieu Quang Pham2, 송승완2, 정현민1
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| 소속 |
1금오공과대, 2충남대 |
| 키워드 |
FPI; binder; battery
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| E-Mail |
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