中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
SYNTHESIS OF HBPS-PEO MULTI-ARM STAR POLYMER ELECTROLYTES AND THEIR IONIC CONDUCTIVITY

文献类型:期刊论文

作者Ren, Shi-tong1; Chang, He-fei1; Zheng, Tao1; Dang, Xiao-fei2; Zhang, Liao-yun1; Li, Hua-yi2; Lin, Yuan3
刊名ACTA POLYMERICA SINICA
出版日期2013-08-20
期号8页码:1064-1071
关键词Click Reaction Multi-arm Star Polymer Polymer Electrolyte Ionic Conductivity
ISSN号1000-3304
DOI10.3724/SP.J.1105.2013.12368
英文摘要In order to obtain polymer electrolytes with high ionic conductivity at room temperature, multi-arm star polymers (HBPS-PEO) containing polyoxyethylene arms of different molecular weights (PEO750, PEO1000 and PEO1900) were successfully synthesized by click chemistry of hyperbranched polystyrene with azide groups (HBPS-N-3) and polyoxyethylene with an alkynyl group (ay-PEO). The structures of the obtained star polymers were characterized by ATR-FTIR,H-1-NMR, GPC, respectively. Ionic conductivities of polymer electrolytes composed of HBPS-PEO and lithium trifluoromethane-sulfonimide (LiTFSI) were investigated via electrochemical impedance spectroscopy. The influences of the arm length of the prepared star polymer, the content of lithium salt in polymer electrolyte and the structure of the polymer matrix on ionic conductivity were also studied. The results showed that star polymer electrolyte with arms of PEO1000 exhibited the highest ionic conductivity,while star polymer electrolyte with arms of PEO1900 had the lowest ionic conductivity, indicating the star polymer with shorter PEO arms possessing lower crystallinity was benefit for the transport of ions. The content of lithium salt also affected the ionic conductivity. The result suggested that ionic conductivity first increased and then decreased gradually with the change of the content of lithium salt. The maximum was achieved when n(EO)/n(Li) = 40. Besides, DSC results showed that the star-shaped structure of the polymer could inhibit the formation of crystals. Lower degree of crystallinity of star polymer and star polymer electrolyte than corresponding linear PEO was observed, and higher ionic conductivity at low temperatures was found for electrolyte based on star polymer than that of corresponding linear PEO electrolyte. The conductivity of the star polymer electrolyte was 6.7 x 10(-5) Scm(-1) at 30 degrees C, and could reach 1.2 x 10(-4) SCM-1 at 40 degrees C. TGA results showed that all of the prepared star polymers exhibited good thermal stability with T-onset above 360 degrees C. It is concluded that star-branched structure can inhibit the formation of crystals,which facilitates the improvement of ionic conductivity at low temperatures, and proper length of PEO chains is necessary to achieve high ionic conductivity.
语种英语
WOS记录号WOS:000323400400017
出版者SCIENCE PRESS
源URL[http://ir.iccas.ac.cn/handle/121111/42253]  
专题中国科学院化学研究所
通讯作者Ren, Shi-tong
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Engn Plast, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China
推荐引用方式
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Ren, Shi-tong,Chang, He-fei,Zheng, Tao,et al. SYNTHESIS OF HBPS-PEO MULTI-ARM STAR POLYMER ELECTROLYTES AND THEIR IONIC CONDUCTIVITY[J]. ACTA POLYMERICA SINICA,2013(8):1064-1071.
APA Ren, Shi-tong.,Chang, He-fei.,Zheng, Tao.,Dang, Xiao-fei.,Zhang, Liao-yun.,...&Lin, Yuan.(2013).SYNTHESIS OF HBPS-PEO MULTI-ARM STAR POLYMER ELECTROLYTES AND THEIR IONIC CONDUCTIVITY.ACTA POLYMERICA SINICA(8),1064-1071.
MLA Ren, Shi-tong,et al."SYNTHESIS OF HBPS-PEO MULTI-ARM STAR POLYMER ELECTROLYTES AND THEIR IONIC CONDUCTIVITY".ACTA POLYMERICA SINICA .8(2013):1064-1071.

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来源:化学研究所

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