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 |
DOI | 10.3724/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 GB/T 7714 | 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. |
入库方式: OAI收割
来源:化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。