Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 11, Pages 9216-9219Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b01298
Keywords
lithium-ion batteries; redox shuttle additives; overcharge protection; pouch cell; safety
Funding
- Vehicle Technology Office, Office of Energy of Efficiency and Renewable Energy, U.S. Department of Energy (DOE)
- Material Engineering Research Facility at Argonne National Laboratory. Argonne, a U.S. Department of Energy Office of Science laboratory [DE-AC02-06CH11357]
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2,5-Di-tert-butyl-1,4-bis(2-methoxyethoxy)benzene (DBBB) is studied as a redox shuttle additive for overcharge protection for a 1.5 Ah graphite/C-LFP lithium-ion pouch cell for the first time. The electrochemical performance demonstrated that the protecting additive remains inert during the extended standard cycling for 4000 cycles. When a 100% overcharge is introduced in the charging protocol, the baseline cell fails rapidly during the first abusive event, whereas the cell containing DBBB additive withstands 700 overcharge cycles with 87% capacity retention and no gas evolution or cell swelling was observed. It is the first time the effectiveness of the DBBB as overcharge protection additive in a large pouch cell format is demonstrated.
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