期刊
ELECTROCHIMICA ACTA
卷 50, 期 19, 页码 3928-3933出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2005.02.050
关键词
anion trapping polymer electrolytes; hydroboration; dehydrocoupling
Organoboron-based anion trapping polymer electrolytes were synthesized through hydroboration or dehydrocoupling reaction between poly(propylene oxide) (PPO) oligomer (M-n = 400, 1200, 2000 and 4000) and 9-borabicyclo[3.3.1]nonane (9-BBN). Obtained oligomers were added various lithium salts (LiN(CF3SO2)(2), LiSO3CF3, LiCO2CF3 or LiBr) to analyze the ionic conductivity and lithium ion transference number (t(Li+)). The ionic conductivity of the oligomer in the presence of LiN(CF3SO2)2 showed higher ionic conductivity than other systems, however, the tLi+ was less than 0.3. When LiSO3CF3 or LiCO2CF3, was added high t(Li+) over 0.6 was obtained. Such difference in t(Li+) can be explained by HSAB principle. Since boron is a hard acid, soft (CF3SO2)(2)N- anion can not be trapped effectively. High ionic conductivity of 1.3 x 10(-6) S cm(-1) and high t(Li+) of 0.73 was obtained when PPO chain length was 2000. These values of facilely prepared polymer electrolytes are comparable to those of the PPOs having covalently bonded salt moieties on the chain ends. (c) 2005 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据