期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 10, 页码 8742-8750出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b16316
关键词
lithium-ion battery; polybenzimidazole; nanoporous membrane; thermal stability; flame resistance
资金
- Outstanding Young Scientist Foundation, Chinese Academy of Sciences (CAS)
- Science and Technology Service Network Initiative [KFJ-EW-STS-108]
- National Youth Top-notch Talent Program
Separators with high security, reliability, and rate capacity are in urgent need for the advancement of high power lithium ion batteries. The currently used porous polyolefin membranes are critically hindered by their low thermal stability and poor electrolyte wettability, which further lead to low rate capacity. Here we present a novel promising porous polybenzimidazole (PBI) membrane with super high thermal stability and electrolyte wettability. The rigid structure and functional groups in the PBI chain enable membranes to be stable at temperature as high as 400 degrees C, and the unique flame resistance of PBI could ensure the high security of a battery as well. In particular, the prepared membrane owns 328% electrolyte uptake, which is more than two times higher than commercial Celgard 2325 separator. The unique combination of high thermal stability, high flame resistance and super high electrolyte wettability enable the PBI porous membranes to be highly promising for high power lithium battery.
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