POS6-0517
Development of a Self-Healing and Reprocessable Waterborne Polyurethane Binder for Battery Electrodes.
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
anjum hanief kohli (kyungpook national university, daegu.)
Co-Author(s)
Abstract
Waterborne polyurethane dispersions (WPUDs) have been studied as environmentally friendly alternatives to solvent-borne polymer systems for coatings, adhesives, and electrode binders. However, conventional WPUD films can be damaged by mechanical stress and are difficult to repair or reprocess after film formation. In this study, we prepared a self-healing and reprocessable WPUD by controlling the soft and hard segment structure and introducing reversible cross-linking sites. The prepared WPUD showed stable dispersion behavior in water and formed continuous films by a conventional waterborne coating process. The dynamic crosslinked structure helped the damaged film recover its original structure and allowed the film to be reprocessed without significant deterioration. The WPUD was also evaluated as a water-based electrode binder. The binder was expected to improve contact among active materials, conductive additives, and the current collector, and to help relieve mechanical stress generated during battery cycling. In addition, the self-healing character of the binder may help reduce micro-crack formation and interfacial degradation in the electrode. These results suggest that the developed WPUD can be used not only as a coating and adhesive material but also as a candidate binder for water-based electrode fabrication.
(Acknowledgement: This research, undertaken at Kyungpook National University, was supported by the Regional Innovation System & Education (RISE) program through the Daegu RISE Center, funded by the Ministry of Education (MOE) and the Daegu Metropolitan City, Republic of Korea.)
