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Improved capacity and reversibility of solid-state Li–O2 battery through water-vapour-assisted cathode reaction

Published

Author(s)

Cherno Jaye, Daniel A. Fischer, Mokwon Kim, Hyunpyo Lee, Hyuk Jae Kwon, Seong-Min Bak, Gabin Lee, Jung O. Park, Dong-Hwa Seo, Song Bok Ma, Dongmin Im

Abstract

The development of a cathode for solid-state lithium-oxygen batteries has been hindered in practice by a low capacity and limited cycle life despite their potential for high energy density. Here, a previously unexplored strategy is proposed wherein the cathode delivers a specific capacity of 200 milliampere hour per gram over 665 discharge/charge cycles, while existing cathodes achieve only 50 milliampere hour per gram and 100 cycles. A highly conductive ruthenium-based composite is designed as a carbon-free cathode by first-principles calculations to avoid the degradation associated with carbonaceous materials, implying an improvement in stability during the electrochemical cycling. In addition, water vapor is added into the main oxygen gas as an additive to change the discharge product from growth-restricted lithium peroxide to easily grown lithium hydroxide, resulting in a notable increase in capacity. Thus, the proposed strategy is effective for developing reversible solid-state lithium-oxygen batteries with high energy density.
Citation
Nature Energy
Volume
8

Keywords

Energy, Li-ion, Li-O2, Batteries, Capacity, Cycles

Citation

Jaye, C. , Fischer, D. , Kim, M. , Lee, H. , Kwon, H. , Bak, S. , Lee, G. , Park, J. , Seo, D. , Ma, S. and Im, D. (2022), Improved capacity and reversibility of solid-state Li–O2 battery through water-vapour-assisted cathode reaction, Nature Energy, [online], https://doi.org/10.1126/sciadv.abm8584, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933023 (Accessed April 23, 2024)
Created April 8, 2022, Updated December 31, 2022