Abstract

The electrolyte solutions based on binary solvent mixtures have shown considerable promise in dual-ion batteries. In order to make the best use of advantages of both propylene carbonate (PC) and methyl acetate (MA), LiPF6-PC and MA solutions are mixed together to pursue an optimized performance of anion storage in graphite electrode. The electrochemical behavior of PF6– storage in graphite has been studied in 1 M LiPF6 PC/MA solutions by galvanostatic charge-discharge test, in-situ or ex-situ measurements. On the other hand, the solutions have been characterized by FTIR and NMR to assess the interactions between ions and solvents. The underlying mechanisms have been explored.

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