Enabling safe aqueous lithium ion open batteries by suppressing oxygen reduction reaction

Long Chen, Longsheng Cao, Xiao Ji, Singyuk Hou, Qin Li, Ji Chen, Chongyin Yang, Nico Eidson and Chunsheng Wang ()
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Long Chen: University of Maryland
Longsheng Cao: University of Maryland
Xiao Ji: University of Maryland
Singyuk Hou: University of Maryland
Qin Li: University of Maryland
Ji Chen: University of Maryland
Chongyin Yang: University of Maryland
Nico Eidson: University of Maryland
Chunsheng Wang: University of Maryland

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Due to the non-flammable nature of water-based electrolytes, aqueous lithium-ion batteries are resistant to catching fire. However, they are not immune to the risk of explosion, since the sealing structure adopted by current batteries limits the dissipation of heat and pressure within the cells. Here, we report a safe aqueous lithium-ion battery with an open configuration using water-in-salt electrolytes and aluminum oxide coated anodes. The design can inhibit the self-discharge by substantially suppressing the oxygen reduction reaction on lithiated anodes and enable good cycle performance over 1000 times. Our study may open a pathway towards safer lithium-ion battery designs.

Date: 2020
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DOI: 10.1038/s41467-020-16460-w

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