Synthesis of a flexible self-standing graphene-like graphite thin film and its application to anode materials for thin-film all-solid-state lithium-ion batteries

抄録

In recent years, all-solid-state lithium-ion batteries (LIBs) have attracted a great deal of attention owing to their high safety and energy density. Among these, flexible thin-film all-solid-state LIBs are considered for the power sources of thin devices, e.g., smart cards and wearable devices. Therefore, thin-film electrodes with high flexibility are required. In this study, as a candidate for an anode material satisfying these requirements, graphene-like graphite (GLG) thin films were fabricated, and their electrochemical properties as the anode of all-solid-state battery were evaluated. The obtained GLG thin film was comprised of densely stacked GLG flakes and had a high flexibility. Based on the charge–discharge measurement results, the GLG thin film had a large reversible capacity of 870 mA h g⁻¹ as an anode of the all-solid-state LIB. These results demonstrated that the potential properties of the GLG thin film make it a new candidate for the anode material of flexible thin-film all-solid-state LIBs.