Transport Properties of LiPF[sub 6]-Based Li-Ion Battery Electrolytes

The electrolyte plays an important role in governing the high-current performance of Li-ion batteries. Normally, battery electrolytes are optimized for maximum conductivity. In order to gain a more profound understanding of the role of the electrolyte, properties such as the Li salt diffusion coefficient, the transference number, and the Li salt activity all need to be measured in addition to the conductivity. The situation is further complicated by the fact that high currents change the cell temperature and also create strong concentration gradients in the electrolyte. A full set of transport properties for in a propylene carbonate/ethylene carbonate/dimethyl/carbonate mixture were measured as a function of…

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  Natural Sciences and Engineering Research Council of Canada