Improved Li-ion kinetics of the anode by kneading process of binder for lithium-ion batteries with high energy density
- Authors
- Park, Keemin; Myeong, Seungcheol; Lee, Dongsoo; Yoo, Hee Eun; Kim, Jaeik; Kim, Chanho; Kim, Jeongheon; Sun, Seho; Kwon, Jiseok; Kim, Soo Chan; Lee, Kangchun; Cho, Chae-Woong; Paik, Ungyu; Song, Taeseup
- Issue Date
- Oct-2023
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Slurry dispersion; Binder adsorption; Kneading process; Li-ion kinetics; Lithium carboxymethyl cellulose
- Citation
- ELECTROCHIMICA ACTA, v.464
- Journal Title
- ELECTROCHIMICA ACTA
- Volume
- 464
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/90200
- DOI
- 10.1016/j.electacta.2023.142900
- ISSN
- 0013-4686
1873-3859
- Abstract
- The low Li-ion kinetics caused by the high ionic and charge transfer resistance in the dense and thick electrode deteriorates electrochemical properties in lithium-ion batteries (LIBs) with high energy density. Here, we report a kneading process of the carboxymethyl cellulose (CMC) binder to improve Li-ion kinetics in the anode. The kneading process of Na-CMC increases the adsorption amount of Na-CMC on the graphite surface, which improves the dispersibility of the anode slurry. Enhanced dispersibility enables uniform pore distribution in the anode, which improves Li-ion kinetics. Moreover, replacing the Na-CMC with Li-CMC in the kneading process further improves Li-ion kinetics in the anode by reducing the charge transfer activation energy due to the formation of high Li-ion conducting LiF-rich solid-electrolyte interphase layer. The anode employing Li-CMC kneading process exhibits enhanced constant current charging capacity retention and cycling stability compared to those of the pristine anode.
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