John Malcolm North

The fabrication and performance of all solid state polymer-based rechargeable lithium cells

Abstract All-solid-state lithium cells utilizing a polymeric electrolyte, (PEO) 9 LiF 3 CSO 3 , and a composite cathode based on V 6 O 13 have been continuously cycled at 120°–140°C. Modifications to the cathode microstructure and composition have led to improved performance in terms of achievable current density, material utilization and reproducibility. 100% active cathode utilization is achieved on the first discharge at 0.27 mA cm −2 and 50% utilization at 0.8 mA cm −2 , (140°C). Capacities of approximately 40% theoretical can be maintained over many tens of cycles at current densities up to 1 mA cm −2 . Scale up of cells to 100 cm 2 area has been carried out without loss of performance and series-connected stacks have been cycled successfully.