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Since the use of high-energy-density batteries continues to expand in large-scale applications, guaranteeing their safety is attracting increasing attention from the public sector and scientific communities. Considerable research efforts have been dedicated to identifying safer alternatives to the traditional electrolytes based on cyclic carbonate solvents, which represent the most flammable battery components. Nevertheless, developing functional electrolytes that may provide high safety and uncompromised electrochemical performance remains challenging. In this study, a multifunctional nonflammable solvent with improved storage stability, viz., 2-(N,N-dimethylamino)-1,3,2-dioxaphospholane 2-oxide (DMAP), is synthesized. The DMAP-based electrolytes enable the formation of a stable passivation film with high electrochemical and thermal stabilities and the suppression of exothermic reactions, resulting in the high reversibility of graphite anodes along with improved battery safety. Strategic optimization of the molecular structures of cyclic phosphoramidates should be a promising approach toward preparing highly safe batteries with high energy densities.

権利情報:

• In Copyright
  

  This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Energy Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsenergylett.4c01579

キーワード: Lithium ion batteries

刊行年月日: 2024-07-12

出版者: American Chemical Society (ACS)

掲載誌:

• ACS Energy Letters (ISSN: 23808195) vol. 9 issue. 7 p. 3628-3635

研究助成金:

• Program on Open Innovation Platform with Enterprises, Research Institute and Academia JPMJPF2016
• Japan Society for the Promotion of Science 20H05673
• Program on Open Innovation Platform with Enterprises, Research Institute and Academia JPMJPF1234

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5034

公開URL: https://doi.org/10.1021/acsenergylett.4c01579

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更新時刻: 2025-07-03 08:30:16 +0900

MDRでの公開時刻: 2025-07-03 08:22:01 +0900