Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 14, Pages 7332-7337Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta00899a
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Funding
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences [DE-AC02-06CH11357]
- Joint Center for Energy Storage Research (JCESR), an Energy Innovation Hub - U.S. Department of Energy, Office of Science, Basic Energy Sciences
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A novel redox shuttle additive, 1,4-bis(trimethylsilyl)-2,5-dimethoxybenzene (BTMSDB), is shown to deliver superb overcharge protection of LiFePO4 electrode in Li-ion batteries. Using this molecule as a chemical probe, we trace the cause of the eventual failure of this additive to the gradual loss of steric protection in the corresponding radical cation, providing the much needed mechanistic insight in the factors controlling the long-term efficiency of overcharge protection.
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