A Strategy to Suppress the Electrochemo-Mechanical Degradation in Solvent-Free Electrodes for All-Solid-State Batteries

作者：Jong Jun Lee, Cheol Bak, Dohwan Kim, Y. Lee · 发表于：ECS Meeting Abstracts · 年份：2022 · DOI：10.1149/ma2022-02642301mtgabs

In response to the safety concerns on highly flammable liquid electrolytes in lithium-ion batteries (LIBs), the all-solid-state batteries (ASSBs) have emerged as promising alternatives for the next generation. The use of solid electrolytes with low flammability can provide resistance to fire/explosion incidents under abnormal conditions. In addition, it is expected that high power and high energy density can be achieved using high-voltage cathode materials due to the wide electrochemical window of solid electrolytes. Therefore, various solid electrolytes (polymer, inorganic, and composite solid electrolytes) were intensively studied. Among the solid electrolytes, sulfide-based inorganic solid electrolytes have attracted much attention due to their advantages. They have the highest ionic conductivity (10-2 ~ 10-3 S cm-1) at room temperature, comparable to a liquid electrolyte. Also, owing to its ductile characteristics, interfacial contact with electrode material is also good, and large-scale production is advantageous. However, there are many problems to be solved to realize ASSB with sulfide-based electrolytes. one of the main obstacles is to produce sheet-type electrodes with high active mass loading and good stability. The slurry process commonly used to manufacture sheet-type electrodes of LIBs cannot be directly applied to ASSBs because sulfide-based electrolytes exhibit high reactivity with most organic solvents. Even if the reactivity is not considered, in the slurry ...