Chemical Reactivity of PFsub 5 and LiPFsub 6 in Ethylene Carbonate/Dimethyl Carbonate Solutions

The thermal decomposition of in a mixture (1:1 molar ratio) of ethylene carbonate (EC)/dimethyl carbonate (DMC) at 85°C is compared to the reaction between EC/DMC and gas. Both produce a brown solution and gaseous products. The reaction products from and in 1:1 EC/DMC, detected by gas chromatography, are similar. Proton nuclear magnetic resonance provided evidence for the presence of oligoether carbonates in the reaction products. © 2001 The Electrochemical Society. All rights reserved.