Developments of the Advanced All-Solid-State Polymer Electrolyte Lithium Secondary Battery

Abstract

In this review, our results of over ten years of research on the all-solid-state polymer electrolyte lithium secondary cell are introduced. The conductivity of polyethylene oxide (PEO)-based polymer electrolytes, which is the best candidate for polymer electrolyte lithium cells, and the interface resistance between PEO and the electrodes have been improved by the addition of BaTiO₃. New composite anodes of Li_2.6Co_0.4N and metal oxides have been proposed for the polymer electrolyte cells. The composite anode has a high reversible capacity and a low irreversible capacity at the first cycle. A carbon anode for the polymer electrolyte lithium cell has also been developed and mesocarbon micro beads exhibit high electrochemical performance. 4-volt class all-solid-state polymer electrolyte cells with the PEO-Li(CF₃SO₂)₂N-LiPF₆-BaTiO₃ electrolyte have been proposed that have good reversible charge-discharge performance.