Advances and issues in developing salt-concentrated battery electrolytes

Yuki Yamada, Jianhui Wang, Seongjae Ko, Eriko Watanabe and Atsuo Yamada ()
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Yuki Yamada: University of Tokyo
Jianhui Wang: University of Tokyo
Seongjae Ko: University of Tokyo
Eriko Watanabe: University of Tokyo
Atsuo Yamada: University of Tokyo

Nature Energy, 2019, vol. 4, issue 4, 269-280

Abstract: Abstract With a worldwide trend towards the efficient use of renewable energies and the rapid expansion of the electric vehicle market, the importance of rechargeable battery technologies, particularly lithium-ion batteries, has steadily increased. In the past few years, a major breakthrough in electrolyte materials was achieved by simply increasing the salt concentration in suitable salt–solvent combinations, offering technical superiority in numerous figures of merit over alternative materials. This long-awaited, extremely simple yet effective strategy can overcome most of the remaining hurdles limiting the present lithium-ion batteries without sacrificing manufacturing efficiency, and hence its impact is now widely felt in the scientific community, with serious potential for industrial development. This Review aims to provide timely and objective information that will be valuable for designing better realistic batteries, including a multi-angle analysis of their advantages and disadvantages together with future perspectives. Emphasis is placed on the pathways to address the remaining technical and scientific issues rather than re-highlighting the many technical advantages.

Date: 2019
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DOI: 10.1038/s41560-019-0336-z

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