Alkali Metal Ion Substituted Carboxymethyl Cellulose as Anode Polymeric Binders for Rapidly Chargeable Lithium-Ion Batteries
Seoungwoo Byun , Zhu Liu , Dong Ok Shin , Kyuman Kim , Jaecheol Choi , Youngjoon Roh , Dahee Jin , Seungwon Jung , Kyung-Geun Kim , Young-Gi Lee , Stefan Ringe , Yong Min Lee
Energy & Environmental Materials ›› 2024, Vol. 7 ›› Issue (1) : 12509
Alkali Metal Ion Substituted Carboxymethyl Cellulose as Anode Polymeric Binders for Rapidly Chargeable Lithium-Ion Batteries
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.
de-solvation / digital twins / fast charging / graphite anodes / polymeric binders
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2022 The Authors. Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University.
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