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Performance Improvement of PVDF-HFP-Based Gel Polymer Electrolyte with the Dopant of Octavinyl-Polyhedral Oligomeric Silsesquioxane
Guo, Xin1,2; Li, Shunchang1,2; Chen, Fuhua1,2; Chu, Ying2; Wang, Xueying2; Wan, Weihua3; Zhao, Lili2; Zhu, Yongping2
2021-06-01
Source PublicationMATERIALS
Volume14Issue:11Pages:14
AbstractGel polymer electrolytes have the advantages of both a solid electrolyte and a liquid electrolyte. As a transitional product before which a solid electrolyte can be comprehensively used, gel polymer electrolytes are of great research value. They can reduce the risk of spontaneous combustion and explosion caused by leakage during the use of conventional liquid electrolytes. Poly(vinylidene-fluoride-co-hexafluoropropylene) (PVDF-HFP), a material with excellent performance, has been widely utilized in the preparation of gel polymer electrolytes. Here, PVDF-HFP-based gel polymer membranes with polyvinyl pyrrolidone (PVP) pores were prepared using a phase inversion method, and Octavinyl-polyhedral oligomeric silsesquioxane (OVAPOSS) was doped to improve its temperature resistance as well as its ionic conductivity, to enhance its safety and electrochemical performance. The final prepared polymer membrane had a porosity of 85.06% and still had a certain mechanical strength at 160 degrees C without any shrinkage. The gel polymer electrolyte prepared with this polymer membrane had an ionic conductivity of 1.62 x 10(-3) S center dot cm(-1) at 30 degrees C, as well as an electrochemical window of about 5.5 V. The LiCoO2-Li button half-cell prepared therefrom had a specific capacity of 141 mAh center dot g(-1) at a rate of 1C. The coulombic efficiency remained above 99% within 100 cycles and the capacity retention rate reached 99.5%, which reveals an excellent cycling stability.
Keywordlithium-ion batteries gel polymer electrolytes ionic conductivity OVAPOSS PVDF-HFP
DOI10.3390/ma14112701
Language英语
WOS KeywordELECTROCHEMICAL PROPERTIES ; LITHIUM ; SEPARATOR ; NANOPARTICLES ; AEROGEL
Funding ProjectOpening Project of State Key Laboratory of Advanced Chemical Power Sources[SKL-ACPS-C-08]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
Funding OrganizationOpening Project of State Key Laboratory of Advanced Chemical Power Sources
WOS IDWOS:000660949700001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/49040
Collection中国科学院过程工程研究所
Corresponding AuthorZhao, Lili; Zhu, Yongping
Affiliation1.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.State Key Lab Adv Chem Power Sources SKL ACPS, Zunyi 563003, Guizhou, Peoples R China
Recommended Citation
GB/T 7714
Guo, Xin,Li, Shunchang,Chen, Fuhua,et al. Performance Improvement of PVDF-HFP-Based Gel Polymer Electrolyte with the Dopant of Octavinyl-Polyhedral Oligomeric Silsesquioxane[J]. MATERIALS,2021,14(11):14.
APA Guo, Xin.,Li, Shunchang.,Chen, Fuhua.,Chu, Ying.,Wang, Xueying.,...&Zhu, Yongping.(2021).Performance Improvement of PVDF-HFP-Based Gel Polymer Electrolyte with the Dopant of Octavinyl-Polyhedral Oligomeric Silsesquioxane.MATERIALS,14(11),14.
MLA Guo, Xin,et al."Performance Improvement of PVDF-HFP-Based Gel Polymer Electrolyte with the Dopant of Octavinyl-Polyhedral Oligomeric Silsesquioxane".MATERIALS 14.11(2021):14.
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