Room Temperature Operation of All‐Solid‐State Potassium‐Ion Battery Enabled by Unconventional Ionic Solid Electrolyte K <sub>6</sub> [Rh <sub>4</sub> Zn <sub>4</sub> ( <scp>l</scp> ‐cys) <sub>12</sub> O]· <i>n</i> H <sub>2</sub> O
The unconventional ionic solid, K<sub>6</sub>[Rh<sub>4</sub>Zn<sub>4</sub>(L-cys)<sub>12</sub>O]·nH<sub>2</sub>O, exhibited excellent formability as well as high ionic conductivity. These features enabled a straightforward assembly of all-solid-state potassium-ion battery: A cold-pressed solid sample of K<sub>6</sub>[Rh<sub>4</sub>Zn<sub>4</sub>(L-cys)<sub>12</sub>O]·nH<sub>2</sub>O, which was sandwiched by solid samples of K<sub>2</sub>Ni[Fe(CN)<sub>6</sub>] and chloranil as cathode, and anode, respectively, displayed an initial discharge capacity of 21.6 mAh g<sup>-1</sup>-electrodes at 25 °C at a current density of 0.5 mA cm<sup>-2</sup> (∼0.34C). Energy dispersive X-ray spectroscopy analysis confirmed that K<sup>+</sup> ions swiftly conduct through K<sub>6</sub>[Rh<sub>4</sub>Zn<sub>4</sub>(L-cys)<sub>12</sub>O]·nH<sub>2</sub>O between the cathode and anode during charge-discharge cycles.
Authors
- Nobuto Yoshinari (ORCID: https://orcid.org/0000-0003-2457-0967)
- Kosuke Nakamoto (ORCID: https://orcid.org/0000-0003-4398-6597)
- Atsushi Inoishi
- Masato Ito (ORCID: https://orcid.org/0000-0003-1689-446X)
- Takafumi Fujii
- Shigeto Okada (ORCID: https://orcid.org/0000-0002-8944-1990)
- Ryo Sakamoto (ORCID: https://orcid.org/0000-0003-1382-8803)
- Takumi Konno (ORCID: https://orcid.org/0000-0003-4612-5418)
- Yukihiro Hara
Institutions
- National Taiwan Normal University (TW)
- Kyushu University (JP)
- Nippon Kayaku (Japan) (JP)
- The University of Osaka (JP)
Publication Details
- Journal
- Chemistry - An Asian Journal
- Published
- 2025-04-08
- DOI
- https://doi.org/10.1002/asia.202401781
- Primary Topic
- Advancements in Battery Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00