화학공학소재연구정보센터
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
소속 1금오공과대, 2충남대
키워드 FPI; binder; battery
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