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Journal Articles ECS Electrochemistry Letters Year : 2013

HF Formation in LiPF6-Based Organic Carbonate Electrolytes

Abstract

HF concentration and generation rate in organic LiPF6-based carbonate electrolytes at 60◦C was studied. Various compositions of linear and cyclic carbonates were used to determine the electrolyte degradation mechanism. Diethyl carbonate (DEC) has been identified as a promoter of HF formation, yielding 1 mmol/L of HF in 1 mol/L LiPF6 DEC after 200 hours at 60◦C. Prolonged aging of 1 mol/L LiPF6, EC:DEC electrolyte at room temperature results in a significantly lower HF formation rate with time. Spiking the aged electrolyte with 500 ppm of water restores the HF formation rate to a level typical for a freshly prepared electrolyte.
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hal-00943357 , version 1 (07-02-2014)

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Simon Franz Lux, Julie Chevalier, Ivan T. Lucas, Robert Kostecki. HF Formation in LiPF6-Based Organic Carbonate Electrolytes. ECS Electrochemistry Letters, 2013, 2 (12), pp.A121-A123. ⟨10.1149/2.005312eel⟩. ⟨hal-00943357⟩
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