title: Superior Thermally Stable and Nonflammable Porous Polybenzimidazole Membrane with High Wettability for High-Power Lithium-Ion Batteries.
abstract: 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 °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.
authors.affiliation: Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Zhongshan Road 457, Dalian 116023, China.|University of Chinese Academy of Sciences , Beijing 100039, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.affiliation: Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Zhongshan Road 457, Dalian 116023, China.
authors.forename: Dingqin
authors.initials: D
authors.lastname: Shi
authors.affiliation: Ningbo Institute of Materials Technology Engineering (NIMTE), Chinese Academy of Sciences , Zhejiang 315201, P. R. China.
authors.forename: Yonggao
authors.initials: Y
authors.lastname: Xia
authors.affiliation: Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Zhongshan Road 457, Dalian 116023, China.|University of Chinese Academy of Sciences , Beijing 100039, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Qiao
authors.affiliation: Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Zhongshan Road 457, Dalian 116023, China.|Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) , Dalian 116023, China.
authors.forename: Xianfeng
authors.identifier: http://orcid.org/0000-0002-8541-5779
authors.initials: X
authors.lastname: Li
authors.affiliation: Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Zhongshan Road 457, Dalian 116023, China.|Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) , Dalian 116023, China.
authors.forename: Huamin
authors.initials: H
authors.lastname: Zhang
keywords: flame resistance; lithium-ion battery; nanoporous membrane; polybenzimidazole; thermal stability