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通过Raman,DSC和XRD等方法对聚氯乙烯醚-侧链含一半硅氢键的羟基封端聚二硅氧烷-高氯酸锂(PEO-PSEMH-LiClO4)全固态共混聚合物电解质进行了研究,结果表明侧链含一半硅氢键的羟基封端聚二硅氧烷(PSEMH)能够显著地降低PEO-LiClO4电解质体系的PEO的结晶性和玻璃化转变温度,同时PSEMH分子的二硅醚链节中氧原子与Li+间具有配位作用,从而大幅提高x%PEO～y%PSEMH-LiClO4(本文中x%,y%分别为PEO和PSEMH占两种聚合物的质量分数)电解质在低温区的离子电导率.而当PSEMH交联硫化之后,虽然降低了PEO的结晶度和Tg,但是由于PSEMH的交联网络限制了聚合物链段的运动性,使得电解质的离子电导率在低温区高于100%PEO-LiClO4(约为12倍),而在高温区则低于100%PEO-LiClO4,充分证明了PSEMH对电解质的离子电导率具有显著的贡献作用.
The hydroxyl-terminated polydiasiloxane-perchlorate-lithium perchlorate (PEO-PSEMH-LiClO4) polymer electrolyte with one-half of silicon-hydrogen bonds in the side chain was synthesized by Raman, DSC and XRD methods. The results showed that PSEMH with half-Si-H bonds could significantly reduce the crystallinity and glass transition temperature of PEO-LiClO4 electrolyte system. Meanwhile, PSEMH molecules of disilicide In the ether chain, oxygen atom and Li + have coordinative effect, so that the content of x% PEO ~ y% PSEMH-LiClO4 (x% and y% are the mass fractions of the two polymers, PEO and PSEMH, respectively) Low ionic conductivity.While PSEMH crosslinked vulcanization, while reducing the crystallinity and Tg of PEO, but due to PSEMH crosslinking network limits the mobility of polymer segments, making the ionic conductivity of the electrolyte at low temperature Region is higher than 100% PEO-LiClO4 (about 12 times) and lower than 100% PEO-LiClO4 in high temperature region, which fully demonstrates that PSEMH has a significant contribution to the ionic conductivity of the electrolyte.