title: Role of Amines in Thermal-Runaway-Mitigating Lithium-Ion Battery.
abstract: 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.
authors: Program of Materials Science and Engineering, University of California-San Diego , La Jolla, California 92093-0418, United States.
authors: Yang
authors: Y
authors: Shi
authors: Program of Materials Science and Engineering, University of California-San Diego , La Jolla, California 92093-0418, United States.
authors: Daniel J
authors: DJ
authors: Noelle
authors: Department of Structural Engineering, University of California-San Diego , La Jolla, California 92093-0085, United States.
authors: Meng
authors: M
authors: Wang
authors: Department of Structural Engineering, University of California-San Diego , La Jolla, California 92093-0085, United States.
authors: Anh V
authors: AV
authors: Le
authors: Department of NanoEngineering, University of California-San Diego , La Jolla, California 92093-0448, United States.
authors: Hyojung
authors: H
authors: Yoon
authors: Department of NanoEngineering, University of California-San Diego , La Jolla, California 92093-0448, United States.
authors: Minghao
authors: M
authors: Zhang
authors: Program of Materials Science and Engineering, University of California-San Diego , La Jolla, California 92093-0418, United States.|Department of NanoEngineering, University of California-San Diego , La Jolla, California 92093-0448, United States.
authors: Ying Shirley
authors: YS
authors: Meng
authors: Program of Materials Science and Engineering, University of California-San Diego , La Jolla, California 92093-0418, United States.|Department of Structural Engineering, University of California-San Diego , La Jolla, California 92093-0085, United States.
authors: Yu
authors: Y
authors: Qiao
keywords: amine; conductivity; lithium-ion battery; safety; thermal runaway