2022 Alkali Metal Ion Substituted Carboxymethyl Cellulose as Anode Polymeri…
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Abstract
The increasing demand for short charging time on electric vehicles has motivated realization of fast chargeable lithium-ion batteries (LIBs). However, shortening the 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 the de-solvation step through a 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 performances. 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.
관련링크
- 이전글Bifunctional Role of Carbon Nanofibrils within Li Powder Composite Anode: More Li Nucleation but Less Li Isolation 24.04.17
- 다음글Unexpected pressure effects on sulfide-based polymer-in-ceramic solid electrolytes for all-solid-state batteries 24.04.17
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