摘要
本文以PEO-LiClO4为基质,在其中加入适量的纳米氧化锌及氧化锡,制备PEO-LiClO4-ZnO及PEO-LiClO4-SnO2离子导电聚合物电解质膜,测定了复合电解质膜的电导率,并探讨了纳米粒子与PEO链的相互作用,提出复合电解质膜的电导率提高的主要影响因素。本文还合成以PEO为基质的PEO-12-钨硅酸质子导电聚合物电解质膜,讨论12-钨硅酸的加入对PEO的构型及Keggin离子的影响并分析PEO-12-钨硅酸复合膜的质子电导提高的主要原因。该复合膜质子电导率室温最高可达6.3×10-2S·cm-1。
Polymer-inorganic composite films of PEO-ZnO-LiClO4, PEO-SnO2-LiCIO4 and PEO-12-TSA(12-TSA: 12-tungstosilicic acid; PEO: polyethylene oxide, Aldrich, MW = 600000) have been prepared through a film-casting method. The interactions between PEO and ZnO nanoparticles and those between PEO and SnO2 nanopartilces decrease the crystallinity of the composite films so as to produce more amorphous regions for charge carriers to transfer, and to release more Li (+) or ClO4 (-) from Li (+) ClO4- ion pairs as charge carriers. As a result, the ionic conductivity of the films is significantly enhanced. The Keggin anions and the polymer molecules are linked together by hydrogen bonds to form a new composite compound of PEO-12-TSA. The ether oxygens of the PEO are associated with H3O (+) cations provided by 12-TSA. 12-TSA not only provides the protons but also favors the formation of the H3O (+) species and increases the proton conductivity of the PEO-12-TSA films.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2002年第1期63-66,共4页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(杰出青年基金No.29725101
重点基金No.29931010)资助项目。
