【作者】 黄逸夫； 许泽群； 章明秋； 阮文红；

【Author】 Yifu Huang;Zequn Xu;Mingqiu Zhang;Wenhong Ruan;Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education,Sun Yat-sen University;

【机构】 中山大学聚合物复合材料及功能材料教育部重点实验；

【摘要】 聚氧化乙烯是一种可溶解无机盐类且具有一定离子传导性质的聚合物基体。目前,聚氧化乙烯已被广泛应用于超级电容器、锂离子电池、燃料电池和染料敏化太阳能电池聚合物电解质等相关领域的研究[1-2]。然而,聚氧化乙烯在作为电解质基体的使用过程中存在如下两个主要问题。首先,聚氧化乙烯的高结晶度导致离子与聚氧化乙烯链段的相互作用较弱。通常,聚氧化乙烯的分子量越高,力学性能越好,但是相应地,聚合物越容易发生结晶,离子传输性能变差。其二,具有线性结构的聚氧化乙烯在电解液中存在溶解问题。溶解后的聚氧化乙烯的力学性能基本丧失。针对以上问题,我们提出采用一种具有短链支化聚氧化乙烯且含活性碳碳双键的单体(P80),并加入交联剂、光引发剂以及纳米二氧化钛,在紫外光作用下制备了一种具有非晶支化聚合物结构且力学性能优异的新型聚合物复合膜,如图1所示。该聚合物复合膜在电化学器件聚合物电解质中具有潜在的应用前景。更多还原

【Abstract】 Nowadays,Polyethylene oxide(PEO) has been widely applied for polymer electrolyte in supercapacitors,lithium-ion batteries,fuel cells and dye-sensitized solar cell,and other related fields[1-2].However,there are two main problems as follows.Firstly,the high crystallinity of PEO can result in the weak interaction between ions and PEO segments.Secondly,the PEO chain usually has a linear structure,so it can be dissolved in the presence of liquid electrolyte.Mechanical properties of dissolved PEO chains are substantially lost.To solve these problems,we propose the use of a type of monomers(P80) which own short and branched PEO chains and also contain reactive carbon double bond,and a crosslinking agent,a photo-initiator,and nano titanium dioxide are added.Under UV irradiation,a branched and amorphous polymer structure containing PEO segments for preparing a novel polymer composite polymer film is obtained with excellent mechanical properties.It is believed that the polymer composite film has potential applications in the polymer electrolyte of electrochemical devices.更多还原