상세정보
학술지
Alkali Metal Ion Substituted Carboxymethyl Cellulose as Anode Polymeric Binders for Rapidly Chargeable Lithium-Ion Batteries
- 발행일
- 202401
- 출처
- Energy & Environmental Materials, v.7 no.1, pp.1-16
- ISSN
- 2575-0356
- 출판사
- Wiley
- 협약과제
- 22ZB1200, ICT 소재·부품·장비 자립기술 및 도전기술 개발, 황치선
- 초록
- The increasing demand for short charging time on electric vehicles has motivated realization of fast chargeable lithium-ion batteries (LIBs). However, shortening charging time of LIBs is limited by Li+ intercalation process consisting of liquid-phase diffusion, de-solvation, SEI crossing, and solid-phase diffusion. Herein, we propose a new strategy to accelerate de-solvation step through control of interaction between polymeric binder and solvent-Li+ complexes. For this purpose, three alkali metal ions (Li+, Na+, and K+) substituted carboxymethyl cellulose (Li-, Na-, and K-CMC) are prepared to examine the effects of metal ions on their performance. The lowest activation energy of de-solvation and the highest chemical diffusion coefficient were observed for Li-CMC. Specifically, Li-CMC cell with a capacity of 3 mAh cm-2 could be charged to >95% in 10 min, while a value above >85% was observed after 150 cycles. Thus, the presented approach holds great promise for the realization of fast charging.
- KSP 제안 키워드
- Activation Energy, Alkali metal ions, Carboxymethyl cellulose, Charging time, Chemical diffusion coefficient, Diffusion coefficient(D0), Intercalation process, Ion batteries, New strategy, Polymeric binder, electric vehicle(EV)