All solid-state lithium polymer secondary batteries using spinel Li4/3Ti5/3O4 as an active material

Present paper describes electrochemical performance of the all solid-state lithium polymer battery (LBP) using spinel-type Li4/3Ti5/3O4 which has been known as the potential candidate of anode materials.The assembled LPB with Li|solid polymer electrolyte(SPE)|Li4/3Ti5/3O4 construction showed stable charge–discharge cycles more than 300 times at 1 C condition. On the other hand, strong charge–discharge rate dependence for the specific capacity and initial capacity loss was indicated. Such a poor rate performance stemmed from low diffusivity of Li+ ion in the by-products produced by the decomposition of SPE components at the SPE|Li4/3Ti5/3O4 interface.