Communication—XAFS Analysis of Discharge/Charge Reactions on the Li/CuCl2 Battery Cathode with LiPF6/Methyl Difluoroacetate Electrolyte. Issue 5 (1st January 2016)

• Record Type: Journal Article
• Authors: Dobashi, Shinsaku; Nakanishi, Koji; Tanida, Hajime; Hashizaki, Katsuo; Uchimoto, Yoshiharu; Hirai, Toshiro; Yamaki, Jun-ichi; Ogumi, Zempachi
• Is Part Of: Journal of the Electrochemical Society. Volume 163:Issue 5(2016)
• Page Start: A727
• Page End: A729
• Publication Date: 2016-01-01
• Subjects: Copper Chlorides -- Li-ion batteries -- methyl difluoroacetate -- X-ray absorption fine structure; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0941605jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : X-ray absorption fine structure (XAFS) analysis was performed on the CuCl2 cathode in Li/CuCl2 battery with LiPF6 /methyl difluoroacetate (MFA) electrolyte to investigate the valence states of Cu during discharge/charge. X-ray absorption near edge structure (XANES) spectrum indicated that the Li/CuCl2 battery can discharge and charge reversibly. The disproportionation side reaction is confirmed to occur during charging. The side reaction, known to induce battery self-discharge, can be suppressed if reaction Cu + LiCl → CuCl + Li + + e − proceeds completely, which may be accomplished by using a more homogeneous composition in the cathode.