Improved Li-ion kinetics of the anode by kneading process of binder for lithium-ion batteries with high energy density

Park, Keemin; Myeong, Seungcheol; Lee, Dongsoo; Yoo, Hongki; Kim, Jaeik; Kim, Chanho; Kim, Jeongheon; Sun, Seho; Kwon, Jiseok; Kim, Soochan; Lee, Kangchun; Cho, Chae-Woong; Paik, Ungyu; Song, Taeseup

doi:10.1016/j.electacta.2023.142900

Cited by 6 publications

(2 citation statements)

References 58 publications

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“…decrease in slurry viscosity. This supports the assumption that no further mechan CMC degradation took place in the slurries prepared at higher energy input than 𝑆 A similar effect of mechanical energy input on CMC adsorption was recently p lished by Park et al [41] However, the group did not consider mechanical degradatio they already used a low molecular weight CMC.…”

Section: Coatingsupporting

confidence: 77%

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Processing of Aqueous Graphite–Silicon Oxide Slurries and Its Impact on Rheology, Coating Behavior, Microstructure, and Cell Performance

Haberzettl,

Filipovic,

Vrankovic

et al. 2023

Batteries

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The mixing process is the basis of the electrode microstructure, which defines key cell performance indicators. This work investigated the effects of varying the energy input within the mixing procedure on slurry rheology, coating behavior, mechanical and electrical properties of dry electrodes and electrochemical performance of cells fabricated from these negative electrodes. Energy input differences were achieved by varying the solids content within the mixing procedure; however, the final total solids content of the slurries was always the same. The slurries, produced with graphite and silicon oxide as active materials and carboxymethylcellulose (CMC) and styrene-butadiene rubber as binders, showed large differences in flow behavior which were explained by changes in CMC adsorption and mechanical degradation because of increasing energy input. Low shear viscosity and the degree of shear thinning decreased with increasing energy input, resulting in a narrower stability window for slot-die coating. The resistance between the electrode and current collector decreased as more CMC was adsorbed on the active material. Electrode adhesion drastically dropped at the highest energy input, presumably due to a change in SBR distribution. Despite these variations, all fabricated pouch cells demonstrated excellent electrochemical performance and a slight trend of increased charge capability was observed in cells prepared with higher energy input.

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Section: Coatingsupporting

confidence: 77%

“…A similar effect of mechanical energy input on CMC adsorption was recently published by Park et al [41] However, the group did not consider mechanical degradation as they already used a low molecular weight CMC.…”

Section: The Low Energy Input Sample 𝑆mentioning

confidence: 75%

Processing of Aqueous Graphite–Silicon Oxide Slurries and Its Impact on Rheology, Coating Behavior, Microstructure, and Cell Performance

Haberzettl,

Filipovic,

Vrankovic

et al. 2023

Batteries

View full text Add to dashboard Cite

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Rational Electrode Design for Enhanced Battery Performance: Addressing SOC Heterogeneity and Achieving Energy Density

Yan,

Wang,

2024

Adv Funct Materials

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The heterogeneity in the state of charge (SOC) across electrodes can significantly abbreviate battery lifespan, deteriorate safety metrics, and diminish capability rate. Despite being a known issue for some time, the factors contributing to this phenomenon have not been systematically summarized. Without a thorough understanding of the underlying causes, it is difficult to devise preventive strategies that can effectively enhance electrode behavior. This paper provides a comprehensive analysis of the factors inducing electrode SOC heterogeneity, identifying the unequal distribution of ions and electrons as the primary cause of the varied reaction rates across the electrode, which ultimately leads to SOC heterogeneity. Subsequently, preventive measures are outlined with a focus on electrode composition and structure. Furthermore, implications of SOC heterogeneity and the challenges associated with achieving both large power density and high energy density in electrodes are discussed. A more profound grasp of the mechanisms governing ion and electron conduction, coupled with materials that can resolve these dilemmas into win–win outcomes, is essential for the advancement of electrodes.

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Effect of particle concentration during kneading on the particle dispersion state of carbon slurry

Kitamura,

Mori

2025

Chemical Engineering Science

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Improved Li-ion kinetics of the anode by kneading process of binder for lithium-ion batteries with high energy density

Cited by 6 publications

References 58 publications

Processing of Aqueous Graphite–Silicon Oxide Slurries and Its Impact on Rheology, Coating Behavior, Microstructure, and Cell Performance

Processing of Aqueous Graphite–Silicon Oxide Slurries and Its Impact on Rheology, Coating Behavior, Microstructure, and Cell Performance

Rational Electrode Design for Enhanced Battery Performance: Addressing SOC Heterogeneity and Achieving Energy Density

Effect of particle concentration during kneading on the particle dispersion state of carbon slurry

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