SINGLE-ION AND DOUBLE-ION TYPE CROSS-LINKED POLYSILOXANE SOLID ELECTROLYTES FOR LITHIUM CELLS

Polymeric solid electrolytes, that have poly(dimethylsiloxane) (PMS) backbone and cross-linked network, were applied to a rechargeable lithium battery system. Single- (PMS-Li) and double-ion type (PMS-LiClO4) electrolytes were prepared from the same prepolymers. Lithium electrode in the both electrolytes showed reversible stripping and deposition of lithium. Intercalation and deintercalation processes of lithium ion between lithium-manganese composite oxide (LixMnO2) electrode and the electrolytes were also confirmed by cyclic voltammetry, however, peak current decreased with several cycles in both cases. The model cell, Li/PMS-Li/LixMnO2 cell had 1.4 mA h g-1 (per 1 g of active material, current density: 3.77 muA cm-2), and the Li/PMS-LiClO4/LixMnO2 cell had 1.6 mA h g-1 (current density: 75.3 muA cm-2).