Sodium‐ and Potassium‐Hydrate Melts Containing Asymmetric Imide Anions for High‐Voltage Aqueous Batteries

DOI DOI Web Site Web Site Web Site View 5 Remaining Hide 18 Citations 30 References
  • Qifeng Zheng
    Department of Chemical System Engineering The University of Tokyo 7-3-1, Hongo, Bunkyo-ku 113-8656 Tokyo Japan
  • Shota Miura
    Department of Chemical System Engineering The University of Tokyo 7-3-1, Hongo, Bunkyo-ku 113-8656 Tokyo Japan
  • Kasumi Miyazaki
    Department of Chemical System Engineering The University of Tokyo 7-3-1, Hongo, Bunkyo-ku 113-8656 Tokyo Japan
  • Seongjae Ko
    Department of Chemical System Engineering The University of Tokyo 7-3-1, Hongo, Bunkyo-ku 113-8656 Tokyo Japan
  • Eriko Watanabe
    Department of Chemical System Engineering The University of Tokyo 7-3-1, Hongo, Bunkyo-ku 113-8656 Tokyo Japan
  • Masaki Okoshi
    Department of Chemistry and Biochemistry Waseda University 3-4-1, Okubo, Shinjuku-ku Tokyo 169-8555 Japan
  • Chien‐Pin Chou
    Waseda Research Institute for Science and Engineering (WISE) Waseda University 3-4-1, Okubo, Shinjuku-ku Tokyo 169-8555 Japan
  • Yoshifumi Nishimura
    Waseda Research Institute for Science and Engineering (WISE) Waseda University 3-4-1, Okubo, Shinjuku-ku Tokyo 169-8555 Japan
  • Hiromi Nakai
    Department of Chemistry and Biochemistry Waseda University 3-4-1, Okubo, Shinjuku-ku Tokyo 169-8555 Japan
  • Takeshi Kamiya
    Mitsubishi Materials Electronic Chemicals Co., Ltd. 3-1-6, Barajima Akita city Akita 010-8585 Japan
  • Tsunetoshi Honda
    Advanced Products Company Mitsubishi Materials Corporation 1-6-1, Yokoami, Sumida-ku Tokyo 130-0015 Japan
  • Jun Akikusa
    Central Research Institute Mitsubishi Materials Corporation 1002-14, Mukohyama, Naka-shi Ibaraki 311-0102 Japan
  • Yuki Yamada
    Department of Chemical System Engineering The University of Tokyo 7-3-1, Hongo, Bunkyo-ku 113-8656 Tokyo Japan
  • Atsuo Yamada
    Department of Chemical System Engineering The University of Tokyo 7-3-1, Hongo, Bunkyo-ku 113-8656 Tokyo Japan

Description

<jats:title>Abstract</jats:title><jats:p>Aqueous Na‐ or K‐ion batteries could virtually eliminate the safety and cost concerns raised from Li‐ion batteries, but their widespread applications have generally suffered from narrow electrochemical potential window (ca. 1.23 V) of aqueous electrolytes that leads to low energy density. Herein, by exploring optimized eutectic systems of Na and K salts with asymmetric imide anions, we discovered, for the first time, room‐temperature hydrate melts for Na and K systems, which are the second and third alkali metal hydrate melts reported since the first discovery of Li hydrate melt by our group in 2016. The newly discovered Na‐ and K‐ hydrate melts could significantly extend the potential window up to 2.7 and 2.5 V (at Pt electrode), respectively, owing to the merit that almost all water molecules participate in the Na<jats:sup>+</jats:sup> or K<jats:sup>+</jats:sup> hydration shells. As a proof‐of‐concept, a prototype Na<jats:sub>3</jats:sub>V<jats:sub>2</jats:sub>(PO<jats:sub>4</jats:sub>)<jats:sub>2</jats:sub>F<jats:sub>3</jats:sub>|NaTi<jats:sub>2</jats:sub>(PO<jats:sub>4</jats:sub>)<jats:sub>3</jats:sub> aqueous Na‐ion full‐cell with the Na‐hydrate‐melt electrolyte delivers an average discharge voltage of 1.75 V, that is among the highest value ever reported for all aqueous Na‐ion batteries.</jats:p>

Journal

Citations (18)*help

See more

References(30)*help

See more

Related Projects

See more

Report a problem

Back to top