Application of a Commercially-Available Fluorine-Free Thermoplastic Elastomer as a Binder for High-Power Li-Ion Battery Electrodes. Issue 6 (5th April 2019)

• Record Type: Journal Article
• Authors: Rynne, Olivier; Lepage, David; Aymé-Perrot, David; Rochefort, Dominic; Dollé, Mickael
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 6(2019)
• Page Start: A1140
• Page End: A1146
• Publication Date: 2019-04-05
• Subjects: Batteries - Lithium -- Binder -- Power application -- Thermoplastic elastomer; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0611906jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Lotader 5500, a commercially-available polyethylene-co-ethyl acrylate-co-maleic anhydride thermoplastic elastomer, is investigated as a new binder for Li-ion battery composite electrodes with LiFePO4 and Li4 Ti5 O12 . This binder was chosen to enhance the cohesion and adhesion properties of the composite electrode it binds through its reactive functional groups; moreover, the absence of fluorine in its composition renders it more suitable than polyvinylidene fluoride (PVDF) in the battery recycling process, which often relies on pyrolysis. Lotader 5500's insolubility in a carbonate electrolyte is demonstrated, as well as its similar electrochemical behavior to PVDF in the 50 mV to 4.2 V range vs. Li + /Li. After demonstrating the high-rate performance of the half-cells, full cells were assembled, and cycled 1, 000 times (charged at a constant voltage of 2.4 V and discharged at 10D), and all exhibit a final capacity of approximately 70 mAh.g −1 .