Alkyl-Ether Group-Modified Anthraquinone-Based Negative Electrode for Enhanced Electrochemical Performance of All Solid-State Rechargeable Air Batteries

• Published in: ACS sustainable chemistry & engineering Vol. 12; no. 45; pp. 16518 - 16523
• Main Authors: Guo, Lin, Miyatake, Kenji, Wada, Suguru, Oka, Kouki, Kitajima, Showa, Kasai, Hitoshi, Tanaka, Ryota, Imoto, Hiroaki, Naka, Kensuke, Xian, Fang, Liu, Fanghua, Mohamed Ahmed Mahmoud, Ahmed, Yadav, Vikrant, Wong, Chun Yik
• Format: Journal Article
• Language: English
• Published: American Chemical Society 11.11.2024
• Subjects: air; anthraquinones; electrochemistry; electrodes; electrolytes; green chemistry; oxygen; redox potential; Proton exchange membranes; All-solid-state batteries; Anthraquinone; Solid polymer electrolyte; Rechargeable air batteries
• ISSN: 2168-0485; 2168-0485
• DOI: 10.1021/acssuschemeng.4c05143

We developed all solid–state rechargeable air batteries (SSABs) comprising alkyl-ether group-substituted anthraquinone (PE-AQ) as a negative electrode, a proton-conductive aromatic ionomer membrane as a solid electrolyte, and a platinum-based oxygen diffusion positive electrode. Compared with our previous SSABs, the proposed SSAB showed higher open circuit and nominal cell voltages (>1.1 and ca. 0.70–0.60 V, respectively) because of the lower redox potential of the PE-AQ and optimized negative electrode configuration. The Coulombic efficiency was 97%, and superior rate characteristics (>90% up to 100 C) were confirmed. During charge/discharge cycling, 82% of the initial discharge capacity was retained after 100 cycles.