| 학회 |
한국고분자학회 |
| 학술대회 |
2020년 가을 (10/05 ~ 10/08, 부산컨벤션센터(BEXCO)) |
| 권호 |
45권 1호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Functional polyimide binder for high-nickel, high-voltage cathode materials of lithium rechargeable batteries |
| 초록 |
Ni-rich layered oxides such as LiNi0.8Co0.1Mn0.1O2(NCM811) are appealing as promising high-capacity cathode materials. The reversible capacity can be charged with a voltage higher than 4.2 V of a conventional battery. But it is difficult to manufacture due to the unstable cathode-electrolyte interface and structural degradation. Herein, we report the combination of NCM811 with non-aqueous functional polyimide binder to imparts enhanced thermal stability and stable interface originating from insitu building-up of surface protective polyimide layer at cathode through monodentate metalcarboxylatechemical bonds during slurry preparation, which permits to charge to 4.4 V despite incommercial electrolyte without additive. It can be charged up to 4.4 V in commercial electrolyte conditions, suppresses metal dissolution and cathodic decomposition, creates a reversible capacity higher than 200 mAhg-1, and provides non-combustible properties unlike conventional binders, enabling stable operation. |
| 저자 |
김정동1, 정현민1, 박준우1, Azimov Farkhod1, 박수빈1, 송승완2
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| 소속 |
1금오공과대, 2충남대 |
| 키워드 |
Ni-rich; binder; polyimide; cathode; NCM811; electrolyte
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| E-Mail |
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