콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Dopamine as a novel electrolyte additive for high-voltage lithium-ion batteries
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2016-08
- 저자명 Hoogil Lee, Taeyeong Han, Kuk Young Cho, Myung-Hyun Ryou, Yong Min Lee
- 학술지명 ACS applied materials & interfaces
- 발행처명 American Chemical Society
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 5
- 논문 다운로드 링크(외부) https://doi.org/10.1021/acsami.6b06074
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
Dopamine, which can be electrochemically oxidized to polydopamine on cathode surface, was introduced as an electrolyte additive for high-voltage lithium-ion batteries (LIBs). The addition of 0.1 wt % dopamine to the electrolyte led to the formation of a polydopamine-containing layer on the cathode, thereby resulting in suppression of the oxidative decomposition of the electrolyte during high-voltage operation (up to 4.5 V) of a LiNi1/3Co1/3Mn1/3O2/artificial graphite cell. The addition of dopamine to the electrolyte improved the capacity retention of the cell from 136 to 147 mAh g–1 after 100 cycles at a rate of 1 C and a cutoff voltage of 4.5 V, while the cycle performance and rate capability with a cutoff voltage of 4.3 V were comparable to those of the cell without dopamine. Further evidence of the positive impact of dopamine on high-voltage LIBs was the lower DC-IRs and AC impedances, as well as the retention of the cathode morphology even after operation at 4.5 V.
