Development of a Feasible and Scalable Manufacturing Method for Ptfe-Based Solvent-Free Lithium-Ion Battery Electrodes

34 Pages Posted: 21 Mar 2024

See all articles by Hyeseong Oh

Hyeseong Oh

affiliation not provided to SSRN

Gyu-Sang Kim

affiliation not provided to SSRN

Byung Un Hwang

affiliation not provided to SSRN

Jiyoon Bang

affiliation not provided to SSRN

Jinsoo Kim

affiliation not provided to SSRN

Kyeong-Min Jeong

affiliation not provided to SSRN

Abstract

Conventional wet-electrode manufacturing faces challenges with producing thicker electrodes due to solvent evaporation issues. This study introduces a novel method for the fabrication of solvent-free dry electrodes by employing polytetrafluoroethylene (PTFE) as a binder, marking a significant advancement in electrode manufacturing processes. By eliminating solvent use, this method not only addresses these challenges but also offers a scalable and practical solution for mass production. The process is meticulously structured into sequential unit operations, each tailored for a distinct function, harnessing the distinctive fibrillation properties of PTFE. Intermediate product specifications for each phase are clearly defined, with a comprehensive analysis of both physical and electrochemical performances conducted. This analysis emphasizes the influence of varying PTFE contents and properties on the microstructure of the dry electrode. Notably, the study achieves a breakthrough with an electrode formulation of NCM811/PTFE/carbon black (CB)/carbon nanotube (CNT) = 96/2.0/1.8/0.2, which demonstrates exceptional capacity retention of 80% at a 0.5 C-rate (5 mA/cm2) under the demanding parameters of 10 mAh/cm2 and 3.8 g/cc. This approach not only enhances the microstructural properties of dry electrodes but also paves the way for environmentally friendly and efficient electrode manufacturing for future energy storage applications.

Keywords: lithium-ion batteries, Dry-processed NCM811 cathode, PTFE binder, High loading

Suggested Citation

Oh, Hyeseong and Kim, Gyu-Sang and Hwang, Byung Un and Bang, Jiyoon and Kim, Jinsoo and Jeong, Kyeong-Min, Development of a Feasible and Scalable Manufacturing Method for Ptfe-Based Solvent-Free Lithium-Ion Battery Electrodes. Available at SSRN: https://ssrn.com/abstract=4764066 or http://dx.doi.org/10.2139/ssrn.4764066

Hyeseong Oh

affiliation not provided to SSRN ( email )

No Address Available

Gyu-Sang Kim

affiliation not provided to SSRN ( email )

No Address Available

Byung Un Hwang

affiliation not provided to SSRN ( email )

No Address Available

Jiyoon Bang

affiliation not provided to SSRN ( email )

No Address Available

Jinsoo Kim

affiliation not provided to SSRN ( email )

No Address Available

Kyeong-Min Jeong (Contact Author)

affiliation not provided to SSRN ( email )

No Address Available

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