Improvement of the Stability of LiPF_6 Electrolytes toward Water by the Addition of LiCl

Tetsuya Kawamura, Takaaki Sonoda, Shigeto Okada, Jun-ichi Yamaki

Research output: Contribution to journalArticle

Abstract

<p>It is known that LiPF<sub>6</sub> electrolytes react with water. In this study, LiCl, LiF, LiBr and LiI were added to 1 M LiPF<sub>6</sub>/EC + DEC electrolyte with about 5000 ppm water to inhibit the reaction of LiPF<sub>6</sub>. When 0.1 M LiCl was added, the LiPF<sub>6</sub> electrolyte did not react with the water for 50 hours. Differential scanning calorimetry (DSC) measurement indicated that the amount of exothermic heat at 265°C, which is related to a reaction with LiPF<sub>6</sub>, did not change at all for 48 hours when LiCl was added. Based on this result, we confirmed that LiPF<sub>6</sub> salt did not react with water when LiCl was added.</p>
Original languageEnglish
Pages (from-to)1139-1141
Number of pages3
JournalElectrochemistry
Volume71
Issue number12
DOIs
Publication statusPublished - Dec 5 2003

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