Fabrication and clcctrochemical characteristics of all-solid-state lithium-ion rechargeable batteries composed of LiMn2O4 positive and V2O5 negative electrodes

A new type of all-solid-state Lithium-ion rechargeable batteries composed o f LiMn2O4 positive and V2O5 negative electrodes were developed and their el ectrochemical characteristics were investigated for the first time. Both am orphous thin-filmed electrodes as well as a lithium phosphorus oxynitride e lectrolyte (Lipon) were deposited on a substrate by using a rf-magnetron sp uttering method. The present rocking-chair type battery showed good charge and discharge characteristics with a typical charge and discharge capacitie s of about 18 mu Ah/cm(2) between 3.5 and 03 V. This battery revealed a rem arkable forming process which means that the charge and discharge capacitie s dramatically increase with the cycle number in its early stages. The batt ery also showed a good charge-discharge operation in vacuum which is one of the advantageous properties expected for the solid-state devices. (C) 2001 Elsevier Science B.V. All rights reserved.