Li+-conductive solid polymer electrolytes with room temperature conduc
tivities of about 2x10(-3) OMEGA-1 cm-1 have been developed. Solid-sta
te Li/LiMn2O4 and C/LiNiO2 batteries employing these electrolytes have
been fabricated and tested. These batteries have shown room temperatu
re performance reminiscent of their liquid electrolyte counterparts.