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Boron nitride nanosheets/carbon fibers-modified separators for high-performance lithium-sulfur batteries
Author NameAffiliationE-mail
GAO He-Jun School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, China 		 
YANG Jing-Wen School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, China 		 
QIAO Jia-Xiao School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, China 		 
QIAO Wei School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, China 		 
CAO Chao-Chao School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, China 		 
LI Ze-Xia School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, China 		 
WANG Peng School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, China 		 
TANG Cheng-Chun School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, China 		 
XUE Yan-Ming 1 School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, China 		ym.xue@hebut.edu.cn 
Abstract: By electrospinning, thermal imidization, and carbonization processes, boron nitride nanosheets (BNNSs) were coated on the surface of carbon fibers (CFs). Thus, BNNSs and CFs can constitute the boron nitride nanosheets/carbon fibers (BNNSs/CFs) composite to modify commercial polypropylene (PP) separators. The synergetic effect of BNNSs and CFs provides an additional conductive path to cells and serves to localize the soluble polysulfide into the cathode region. As a result, the cell assembled with the 10BNNSs/CFs-PP separator exhibited an initial discharge capacity as high as 1 295.7 mAh·g-1 at 0.05C. Upon increasing the current density to 1C, the cells with 10BNNSs/CFs-PP separators also delivered excellent long-term cycling stability up to 400 cycles and a high final capacity of 583.1 mAh·g-1 with a capacity decay of 0.069% per cycle.
Keywords: boron nitride nanosheets  electrospinning  shuttle effect  separator  lithium-sulfur battery
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GAO He-Jun,YANG Jing-Wen,QIAO Jia-Xiao,QIAO Wei,CAO Chao-Chao,LI Ze-Xia,WANG Peng,TANG Cheng-Chun,XUE Yan-Ming.Boron nitride nanosheets/carbon fibers-modified separators for high-performance lithium-sulfur batteries[J].Chinese Journal of Inorganic Chemistry,2023,39(6):1139-1150.
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Chinese Journal of Inorganic Chemistry