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- Title
All‐Solid‐State Rechargeable Air Batteries Using Dihydroxybenzoquinone and Its Polymer as the Negative Electrode.
- Authors
Yonenaga, Makoto; Kaiwa, Yusuke; Oka, Kouki; Oyaizu, Kenichi; Miyatake, Kenji
- Abstract
A proof‐of‐concept study was conducted on an all‐solid‐state rechargeable air battery (SSAB) using redox‐active 2,5‐dihydroxy‐1,4‐benzoquinone (DHBQ) and its polymer (PDBM) and a proton‐conductive polymer (Nafion). DHBQ functioned well in the redox reaction with the solid Nafion ionomer at 0.47 and 0.57 V vs. RHE, similar to that in acid aqueous solution. The resulting air battery exhibited an open circuit voltage of 0.80 V and a discharge capacity of 29.7 mAh gDHBQ−1 at a constant current density (1 mA cm−2). With PDBM, the discharge capacity was much higher, 176.1 mAh gPDBM−1, because of the improved utilization of the redox‐active moieties. In the rate characteristics of the SSAB‐PDBM, the coulombic efficiency was 84 % at 4 C, which decreased to 66 % at 101 C. In a charge/discharge cycle test, the capacity remaining after 30 cycles was 44 %, which was able to be significantly improved, to 78 %, by tuning the Nafion composition in the negative electrode.
- Subjects
POLYMER electrodes; NEGATIVE electrode; STORAGE batteries; OPEN-circuit voltage; ELECTRIC batteries; QUINONE; LITHIUM-air batteries; NAFION
- Publication
Angewandte Chemie, 2023, Vol 135, Issue 30, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202304366