期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 45, 页码 30956-30963出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b10501
关键词
lithium-ion battery; thermal runaway; safety; conductivity; amine
资金
- Advanced Research Projects Agency-Energy (ARPA-E) [DE-AR0000396]
Benzylamine (BA), dibenzylamine (DBA), and trihexylamine (THA) are investigated as thermal-runaway retardants (TRR) for lithium-ion batteries (LIBs). In a LIB, TRR is packaged separately and released when internal shorting happens, so as to suppress exothermic reactions and slow down temperature increase. THA is identified as the most efficient TRR. Upon nail penetration, 4 wt % THA can reduce the peak temperature by nearly 50%. The working mechanisms of the three amines are different: THA is highly wettable to the separator and immiscible with the electrolyte, and therefore, it blocks lithium-ion (Li+) transport. BA and DBA decrease the ionic conductivity of electrolyte and increase the charge transfer resistance. All three amines react with charged electrodes; the reactions of DBA and THA do not have much influence on the overall heat generation, while the reaction of BA cannot be ignored.
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