@article{382bae5c985e480aa87572d7f7f8ad87,
title = "Oxygen Redox Versus Oxygen Evolution in Aqueous Electrolytes: Critical Influence of Transition Metals",
abstract = "Aqueous lithium-ion batteries are promising electrochemical energy storage devices owing to their sustainable nature, low cost, high level of safety, and environmental benignity. The recent development of a high-salt-concentration strategy for aqueous electrolytes, which significantly expands their electrochemical potential window, has created attractive opportunities to explore high-performance electrode materials for aqueous lithium-ion batteries. This study evaluates the compatibility of large-capacity oxygen-redox cathodes with hydrate-melt electrolytes. Using conventional oxygen-redox cathode materials (Li2RuO3, Li1.2Ni0.13Co0.13Mn0.54O2, and Li1.2Ni0.2Mn0.6O2), it is determined that avoiding the use of transition metals with high catalytic activity for the oxygen evolution reaction is the key to ensuring the stable progress of the oxygen redox reaction in concentrated aqueous electrolytes.",
keywords = "aqueous batteries, aqueous electrolyte, batteries, cathodes, oxygen evolution, oxygen redox",
author = "Hirohito Umeno and Kosuke Kawai and Daisuke Asakura and Masashi Okubo and Atsuo Yamada",
note = "Funding Information: This work was financially supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan; Grant‐in‐Aid for Scientific Research (S) No. 20H05673. This work was supported by JST, CREST Grant Number JPMJCR21O6, Japan. M. O. was financially supported by JPSP KAKENHI (Grant Number 19H05816, 18K19124, and 18H03924), and the Asahi Glass Foundation. X‐ray absorption/emission spectroscopy at BL07LSU of SPring‐8 was performed by joint research in SRRO and ISSP, the University of Tokyo (Proposal No. 2021A7498, 2020A7474, 2019B7456, 2019A7452, 2018B7590, and 2018A7560). X‐ray absorption spectroscopy at BL9C of KEK was conducted under the approval of the Photon Factory Program Advisory Committee (Proposal No. 2018G082). The authors are grateful to J. Miyawaki and H. Harada at the University of Tokyo for their support on the X‐ray absorption/emission experiments. Funding Information: This work was financially supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan; Grant-in-Aid for Scientific Research (S) No. 20H05673. This work was supported by JST, CREST Grant Number JPMJCR21O6, Japan. M. O. was financially supported by JPSP KAKENHI (Grant Number 19H05816, 18K19124, and 18H03924), and the Asahi Glass Foundation. X-ray absorption/emission spectroscopy at BL07LSU of SPring-8 was performed by joint research in SRRO and ISSP, the University of Tokyo (Proposal No. 2021A7498, 2020A7474, 2019B7456, 2019A7452, 2018B7590, and 2018A7560). X-ray absorption spectroscopy at BL9C of KEK was conducted under the approval of the Photon Factory Program Advisory Committee (Proposal No. 2018G082). The authors are grateful to J. Miyawaki and H. Harada at the University of Tokyo for their support on the X-ray absorption/emission experiments. Publisher Copyright: {\textcopyright} 2022 The Authors. Advanced Science published by Wiley-VCH GmbH.",
year = "2022",
month = apr,
day = "25",
doi = "10.1002/advs.202104907",
language = "English",
volume = "9",
journal = "Advanced Science",
issn = "2198-3844",
publisher = "Wiley-VCH Verlag",
number = "12",
}
