Polytetrafluoroethylene (PTFE) is used as a binder, for both anodes and cathodes due to its high chemical and thermal resistance.
Commonly known as Teflon, a thermoplastic polymer used for non-stick coatings and bearings.
Used in dry-electrode processing techniques as it avoids the need for solvents. However, one issue is it doesn’t adhere well to electrodes.
References
- Shiyan Gao, Yuefeng Su, Liying Bao, Ning Li, Lai Chen, Yu Zheng, Jun Tian, Jian Li, Shi Chen, Feng Wu, High-performance LiFePO4/C electrode with polytetrafluoroethylene as an aqueous-based binder, Journal of Power Sources, Volume 298, 2015, Pages 292-298
- Hyeseong Oh, Gyu-Sang Kim, Byung Un Hwang, Jiyoon Bang, Jinsoo Kim, Kyeong-Min Jeong, Development of a feasible and scalable manufacturing method for PTFE-based solvent-free lithium-ion battery electrodes, Chemical Engineering Journal, Volume 491, 2024
See also
The Structural Role of Carbon Black in Dry Electrode Processing