In this presentation, the electrolytes and additives for lithium-ion batteries were studied in three perspectives: 1) Five room temperature ionic liquids based on C-2 substituted imidazolium cations and bis(trifluoromethanesulfonyl)imide (TFSI) anions were synthesized and their physicochemical properties: thermal property, density, viscosity, ionic conductivity, self-diffusion coefficients,and electrochemical stability, were systematically investigated. These ILs were effective electrolytes with Li4Ti5O12; 2) Polymer gel electrolytes with polyethylene glycol methacrylates and ionic liquids were synthesized and these polymer gel electrolytes showed good discharge capacity and cycle stability with LiFePO4, and no significant loss in discharge capacity of the battery was observed over 50 cycles; 3) New ionic liquids with fluorinated bis(malonato)borate anions were synthesized and studied. These ILs have excellent ability in formation of SEI on graphite electrodes.

Electrolytes and additives for lithium-ion batteries

244th National Meeting (2012)

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