Open AccessNanosized and metastable molybdenum oxides as negative electrode materials for durable high-energy aqueous Li-ion batteries
Author(s) -
Jeongsik Yun,
Ryota Sagehashi,
Yoshihiko Sato,
Toshio Masuda,
Shigeki Hoshino,
Hongahally Basappa Rajendra,
Kazuki Okuno,
Akihisa Hosoe,
Aliaksandr S. Bandarenka,
Naoaki Yabuuchi
Publication year - 2021
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.2024969118
Subject(s) - materials science , electrolyte , aqueous solution , chemical engineering , electrode , electrochemistry , electrochemical window , lithium (medication) , x ray photoelectron spectroscopy , oxide , inorganic chemistry , chemistry , ionic conductivity , organic chemistry , metallurgy , medicine , engineering , endocrinology
Significance This study describes a high-energy and durable aqueous battery system with metastable and nanosized Mo-based oxides used as high-capacity negative electrodes. A wider electrochemical window is achieved with concentrated aqueous electrolytes through which highly reversible Li storage without the decomposition of water molecules is achieved for the Mo-based oxides. A full cell with an Mn-based oxide shows good capacity retention over 2,000 cycles. X-ray absorption spectroscopy reveals that the solid-state redox reaction of Mo ions reversibly proceeds in aqueous electrolytes for the metastable Mo oxide. This study opens a way to develop high-energy, durable, and safe batteries on the basis of metastable and nanosized oxides with aqueous electrolyte solutions.