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A Novel Self-Binding Composite Separator Based on Poly(tetrafluoroethylene) Coating for Li-Ion Batteries
Zhang, Kaiyue1,2; Xiao, Wei1,2; Liu, Jianguo1,2; Yan, Chuanwei1,2
Corresponding AuthorXiao, Wei(wxiao@imr.ac.cn)
2018-12-01
Source PublicationPOLYMERS
ISSN2073-4360
Volume10Issue:12Pages:13
AbstractIn this study, a novel composite separator based on polytetrafluoroethylene (PTFE) coating layers and a commercial polyethylene (PE) separator is developed for high performance Li-ion batteries. This composite separator is prepared by immersing a PE separator directly into a commercial PTFE suspension to obtain a self-binding PTFE/PE/PTFE tri-layered structure. Then, the as-prepared composite separator is further treated with a H2O2/H2SO4 solution to enhance its electrolyte affinity. The results show that the coating layer, consisting of close-packed PTFE particles, possesses a highly ordered nano-porous structure and an excellent electrolyte wettability property, which significantly enhance the ionic conductivity of the composite separator. Due to the presence of the PTFE-based coating layer, the composite separator exhibits better thermal stability compared with the PE separator, reaching the thermal-resistant grade of commercial ceramic-coated separators. By using different separators, CR2032-type unit half-cells composed of a Li anode and a LiFePO4 cathode were assembled, and their C-rate and cycling performances were evaluated. The cell assembled with the composite separator was proven to have better C-rate capability and cycling capacity retention than the cell with the polyethylene separator. It is expected that the composite separator can be a potential candidate as a coating-type separator for high-performance rechargeable Li-ion batteries.
Keywordself-binding coating poly(tetrafluoroethylene) poly(ethylene) separator cell performance Li-ion battery
Funding OrganizationNational Natural Science Foundation of China ; Natural Science Foundation of Liaoning ; Shenyang Science and Technology Project
DOI10.3390/polym10121409
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[21676282] ; Natural Science Foundation of Liaoning[20180510039] ; Shenyang Science and Technology Project[18013051]
WOS Research AreaPolymer Science
WOS SubjectPolymer Science
WOS IDWOS:000454748700117
PublisherMDPI
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/130962
Collection中国科学院金属研究所
Corresponding AuthorXiao, Wei
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Kaiyue,Xiao, Wei,Liu, Jianguo,et al. A Novel Self-Binding Composite Separator Based on Poly(tetrafluoroethylene) Coating for Li-Ion Batteries[J]. POLYMERS,2018,10(12):13.
APA Zhang, Kaiyue,Xiao, Wei,Liu, Jianguo,&Yan, Chuanwei.(2018).A Novel Self-Binding Composite Separator Based on Poly(tetrafluoroethylene) Coating for Li-Ion Batteries.POLYMERS,10(12),13.
MLA Zhang, Kaiyue,et al."A Novel Self-Binding Composite Separator Based on Poly(tetrafluoroethylene) Coating for Li-Ion Batteries".POLYMERS 10.12(2018):13.
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