具有热关断涂层的锂电池隔膜性能表征
Characterization of the Separator with Thermal-Shutdown Layer for Use in Lithium Batteries
Online published: 2015-10-28
白 莉 , 怀永建 , 艾新平 , 贾 海 . 具有热关断涂层的锂电池隔膜性能表征[J]. 电化学, 2015 , 21(5) : 459 -464 . DOI: 10.13208/j.electrochem.150746
In this paper, the lithium ion battery coated with the thermal-shutdown functional layer has been introduced. The shutdown temperature of the separator could be decreased by using the melting point of thermal-shutdown functional layer. When the internal battery environment reached a critical temperature, the functional layer melted and coated the anode/separator with a non-conductive barrier, halting Li-ion transport and shutting down the cell permanently. The results showed that the functional layer did not affect the resistance, rate performance and cycle life. It was found the functional layer can significantly improve the safety of the battery when misused.
Key words： separator; shutdown temperature; lithium battery; safety
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