Journal
ACS NANO
Volume 13, Issue 8, Pages 9067-9073Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b03304
Keywords
lithium-sulfur battery; lithium polysulfide; solid-electrolyte interphase (SEI); electrolyte system; battery cycle life
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Funding
- National Natural Science Foundations of China [51872193, 21703149, 51622208]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy, through the Advanced Battery Materials Research (BMR) Program (Battery500 Consortium) [DE-EE0007762]
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Lithium-sulfur (Li-S) batteries have been explored extensively for high-capacity electric-power storage, but their practical application has been prevented by severe issues stemming from the use of a lithium anode and an organic-liquid electrolyte in which Li2Sx intermediates of the cell discharge reaction are soluble and shuttle to the anode. Both problems are addressed using bis(4-nitrophenyl) carbonate as an additive in the organic-liquid electrolyte. The soluble Li2Sx polysulfides react with the additive to create insoluble polysulfides with a lithium byproduct; this byproduct reacts with the Li-metal anode to create an anode passivation layer that is a good Li+ conductor, which allows for safe and rapid plating/stripping of lithium metal with a low impedance.
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