Characterization of Hot-Melt Kneading Process of Sulfur and Porous Carbon for All-Solid-State Batteries

Abstract

We have proposed a hot-melt kneading process using sulfur and porous carbon to produce composite cathodes for all-solid-state batteries. In this study, we investigated a key parameter to control the structure of composite particles obtained from the hot-melt kneading process. Furthermore, we investigated the correlation between composite-particles structure and their electrochemical performance. By changing the weight ratio of sulfur to porous carbon, the two types of composite particles were produced: composite particles with almost all sulfur existing inside the pore; and those with a part of sulfur existing outside the pore. The latter composite particles exhibited higher cycle performance.