To mitigate poor contact issues between electrolyte/electrode materials interfaces of all‐solid‐state batteries (ASSB), we newly introduce a novel solution‐processed synthesis that exploits the differences in the boiling point and polarity of the two solvents (i. e., methanol, and toluene), with a cavitation effect by bubbling inert gas. Through this process, called solvent exchange with bubbles (SEB), the Li6PS5Cl solid electrolyte is synthesized with a particle size below 800 nm and sufficient ionic conductivity of 1.54 mS/cm at 25 °C. In addition, the ASSB cell consisting of the cathode electrode with Li6PS5Cl synthesized by the SEB exhibited a high capacity of 176 mAh/g at 0.1 C (55 °C) owing to the improved contact between the electrode and solid electrolyte. In particular, the rate capability of the cell is superior to that of a cell with Li6PS5Cl prepared by ball milling.
The Front Cover shows a particle size reduction process of LPSCl solid electrolyte with a cavitation bubbling effect during a novel solution‐processed synthesis, for practical application in all‐solid‐state cells. More information can be found in the Research Article by S.‐M. Lee, J. In Lee, J.‐H. Park and co‐workers.
Invited for this month's cover picture is the group of Dr. Jun‐Ho Park. The cover picture shows a particle size reduction process of Li6PS5Cl solid electrolyte with a cavitation bubbling effect during a novel solution‐processed synthesis. By reducing the particle size of the solid electrolyte, it is possible to increase the contact area between the two materials and reduce the interfacial resistance between cathode and electrolyte materials. Read the full text of the Research Article at 10.1002/batt.202300036.
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