Reversible Crosslinked Polymer Binder for Recyclable Lithium Sulfur Batteries with High Performance

Reversible Crosslinked Polymer Binder for Recyclable Lithium Sulfur Batteries with High Performance

TitleReversible Crosslinked Polymer Binder for Recyclable Lithium Sulfur Batteries with High Performance
Publication TypeJournal Article
Year of Publication2020
AuthorsZhimeng Liu, Xin He, Chen Fang, Luis E Camacho‐Forero, Yangzhi Zhao, Yanbao Fu, Jun Feng, Robert Kostecki, Perla B Balbuena, Junhua Xhang, Jingxin Lei, Gao Liu
JournalAdvanced Functional Materials
Volume30
Issue36
Pagination2003605
Date Published07/2020
ISSN1616-301X
Abstract

Owing to the negative impact of the extensive utilization of batteries on the environment, sustainability of the cells needs to be included in the systemic research of batteries. Herein, a dissolvable ionic crosslinked polymer (DICP) is exploited as a binder for lithium–sulfur batteries by crosslinking the polyacrylic acid and polyethyleneimine through carboxy‐amino ionic interaction. This interaction is pH‐controlled, and therefore, the crosslinked binder network can be readily dissociated under basic conditions, providing a facile strategy enabling valuable components recycled through a convenient washing method. The sulfur cathode prepared using the recycled carbon–sulfur composite can deliver comparable capacity as that of fresh electrode. In addition, evidence from cell performance and characterizations, such as in situ X‐ray absorption spectroscopy, in situ UV–visible spectroscopy, X‐ray photoelectron spectroscopy, and density functional theory calculation, confirms that DICP is a more effective binder than its commercial counterpart on suppressing polysulfide dissolution in the electrolyte. Exploiting reversible crosslinked polymer binder for recyclable Li–S batteries with ameliorated electrochemical performance, this study illuminates sustainable development for large‐scale energy storage systems.

DOI10.1002/adfm.v30.3610.1002/adfm.202003605
Short TitleAdv. Funct. Mater.
Refereed DesignationRefereed