Electrospun poly(ethylene oxide) nanofibrous composites with enhanced ionic conductivity as flexible solid polymer electrolytes  

作　　者：Jun-Wei Zha Na Huang Kang-Qiang He Zhi-Min Dang Chang-Yong Shi Robert KwokYiu Li 

机构地区：[1]Department of Physics and Materials Science,City University of Hong Kong,Tat Chee Avenue,Kowloon,Hong Kong,People’s Republic of China [2]Department of Polymer Science and Engineering,School of Chemistry and Biological Engineering,University of Science and Technology Beijing,Beijing 100083,People’s Republic of China [3]State Key Laboratory of Electrical System,Department of Electrical Engineering,Tsinghua University,Beijing 100084,People’s Republic of China [4]Department of Elements,Beijing Institute of Fashion Technology,Beijing 100029,People’s Republic of China

出　　处：《High Voltage》2017年第1期25-31,共7页高电压（英文）

基　　金：supported by the NSFC(nos.51622701,51425201 and 51377010);the Hong Kong Scholar Program(XJ 2014048),Research Grants Council of the Hong Kong Special Administrative Region,China(CityU 118313);Ministry of Education of China through Doctor Project(grant no.20130006130002);China Postdoctoral Science Foundation funded project(no.2015M580983);State Key Lab.of Power System of Tsinghua University(SKLD16KZ03);the Fundamental Research Funds for the Central Universities(no.FRF-BR-15-008B);the Project of Science and Technology Program for Beijing Municipal Commission of Education(no.KM2015100120095).

摘　　要：Solid polymer electrolytes(SPEs)have great potential to address the safety issues of lithium(Li)-ion batteries when compared with conventional liquid electrolytes,which makes them a promising alternative for next-generation high-energy batteries.In this work,poly(ethylene oxide)-lithium perchlorate(PEO–LiClO4)polymer electrolytes for Li-ion batteries were prepared using electrospinning.The crystallinity,ionic conductivity as well as mechanical properties were investigated.Ionic conductivities and mechanical properties of PEO–LiClO4 based SPE have been obviously increased by incorporating modified TiO2 nanofibres(TNFs)than TiO2 nanoparticles(TNPs),due to that both TNFs and TNPs can decrease the crystalline phase concentration of PEO and increase segmental flexibility of PEO.The SPE with 3 wt%TNFs exhibits the highest conductivity of 5.308×10−5 S cm−1 at 20°C and higher tensile strength of 13.8 MPa.These results highlight the potential of utilising the electrospinning method to improve the ionic conductivity of SPEs.

关 键 词：CONDUCTIVITY IONIC POLYMER 

分 类 号：O63[理学—高分子化学]