Abstract
Lithium secondary batteries are used in diverse fields, such as mobile electronics, electric vehicles and energy storage system. As the market for large-scale energy storage gradually increases, high energy density lithium batteries with enhanced safety are required. Among various types of battery systems, all-solid-state lithium batteries (ASSLBs) employing sulfide electrolytes are attracted a great deal of attention due to their enhanced safety and high energy density. When assembling ASSLBs, the composite cathode is usually consisted of active material, sulfide electrolyte, conducting carbon and polymer binder. During charge and discharge processes of ASSLBs, the active materials suffer volume expansion and contraction, resulting in formation of large cracks and void space in the electrode. In this study, we investigate polymer binders with good adhesive and interfacial property for achieving good electrochemical performance of the composite cathode. The effect of type of polymer binder on the cycling performance of ASSLBs will be presented and discussed.
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