Chemical Stability Investigations of Polyisobutylene as New Binder for Application in Lithium Air-Batteries. (10th February 2015)

• Record Type: Journal Article
• Authors: Heine, Jennifer; Rodehorst, Uta; Badillo, Juan Pablo; Winter, Martin; Bieker, Peter
• Is Part Of: Electrochimica acta. Volume 155(2015)
• Page Start: 110
• Page End: 115
• Publication Date: 2015-02-10
• Subjects: Lithium-Air Batteries -- Binder -- Chemical Stability -- PIB -- PVdF; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.01.001
• Languages: English
• ISSNs: 0013-4686

Abstract

ABSTRACT: The side reactions of LiO2, Li2 O2 and Li2 O, formed during the discharge process at the cathode/electrolyte interphase, are still a main challenge of lithium-air batteries. During these reactions, polyvinylidene difluoride (PVdF), as the commonly used cathode binder material, is decomposing, leading to a shorter lifetime of the battery. In this paper, we introduced and investigated polyisobutylene (PIB), a chemically and electrochemically inert polymeric material, to substitute PVdF as binder for lithium-air batteries. Results obtained by X-ray diffraction and spectroscopic methods showed, that PIB is far more stable in the presence of O2 −, O2 2− as well as O 2− species compared to PVdF. This distinct inertness makes PIB a promising binder for lithium-air batteries.