Transport properties of binary salt polymer electrolytes

Transport properties (ionic conductivities (sigma), salt diffusion coeffici ents (D-s), and cationic transference numbers (t(+)(0))) as a function of s alt concentration (C-s) are reported and compared for several common binary salt/polymer systems being considered for use as electrolytes in rechargea ble lithium batteries for electric vehicle and other applications. The thre e properties provide a complete description of transport in solid polymer e lectrolytes (SPEs) or "dry" systems in cells undergoing galvanostatic charg e and discharge. The macroscopic approach used obviates the need to know th e details of speciation in these non-ideal solutions and allows for a more sophisticated correlation of the characteristics of ion transport with poly mer structure, salt type, and concentration than conductivity data alone. P ublished by Elsevier Science S.A.