All‐Solid‐State Chloride‐Ion Battery with Inorganic Solid Electrolyte. Issue 23 (11th October 2021) - Sakamoto, Ryo
Abstract: Chloride‐ion batteries have some attractive properties such as high energy density and low cost. However, they have poor cycle performance because chloride as an active material tends to dissolve into a polar solvent. Herein, an all‐solid‐state chloride‐ion battery is demonstrated with KCl‐doped PbCl2 as a solid electrolyte to suppress the dissolution of chloride. The all‐solid‐state cell with BiCl3 as the cathode had an initial discharge capacity of 187 mAh g −1, which corresponds to 73 % of the theoretical capacity of BiCl3 . Moreover, it exhibited better cyclability compared to the previously reported non‐aqueous cell with BiCl3 cathode. During the charge‐discharge process, XRD and XPS analysis confirmed the unique behavior of conversion reaction by Cl − anion, where Bi is produced by discharging and BiCl3 returns by charging. Abstract : Chloride‐ion batteries generally exhibit poor cyclability because of the high solubility of chloride, as an active material, in polar solvents. An all‐solid‐state chloride‐ion battery containing a PbCl2 ‐based solid electrolyte and exhibiting good cycle performance is reported.