原位聚合法制备兰炭/聚苯胺复合材料及其电容性能  

Synthesis of Semicoke/Polyaniline Composite by in-situ Polymerization and Its Capacitance Properties

作　　者：汪晓芹[1] 张永[1] 程君 林卫丽[3] 周安宁[1] 熊善新[1] 宫铭[1] 吴伯华[1] 褚佳[1] 

机构地区：[1]西安科技大学化学与化工学院,陕西西安710054 [2]深圳豪鹏科技有限公司,广东深圳518111 [3]西安工业大学北方信息工程学院,陕西西安710025

出　　处：《材料科学与工程学报》2015年第4期490-495,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(21406176);陕西省自然科学基础研究计划资助项目(2011JY012);榆林市省市联合资助基础研究资助项目([2011]10号-11);陕西省教育厅科学研究计划资助项目(2013JK0650)

摘　　要：以兰炭为基体,通过引发苯胺在其孔隙和表面进行原位聚合,制得BET平均孔径为11.1nm、电导率为58.0S·m-1、比电容为143.6F/g、能量密度为16.2Wh/kg、兼具双电层电容和赝电容特征的兰炭/聚苯胺复合材料。SEM、比表面与孔结构、FTIR、电导率和电容性能测试表明,聚苯胺对兰炭进行了大孔填隙和表面包覆,聚苯胺对兰炭的大孔填隙使其转变成多个介孔,且填隙聚苯胺呈现的伸展链构象,共同改善了材料的电子传输和电容特性。另外,聚苯胺大分子与兰炭中的芳核分子发生了化学键合,形成了更大共轭体系。且聚苯胺分子链中的N与兰炭表面的醇羟基,聚苯胺分子链上的仲胺盐中的H与兰炭表面的芳基烷基醚形成的氢键进一步加强了两者的界面作用。提出了兰炭/聚苯胺复合材料的界面作用模型。Semicoke/polyaniline composite was synthesized through initiating the in-situ polymerization of aniline in the pores or on the surface of semicoke. The composite possessed BET average pore size of 11. lnm, the conductivity of 58.0S. m-1, the specific capacitance of 289.1F/g and the energy density of 40.2Wh/kg, exhibiting both dual-layer capacitance and pseudocapacitance properties. The samples were also characterized by SEM, specific surface area and pore structure tests, FTIR, conductivity and capacitance measurements. The results showed that semicoke surface was covered and its macropores were implanted by polyaniline. The macropores were transformed to multiple mesopores and the polyaniline chains within the pores were extended. Those could bring about stronger capacitance properties and higher electron transport ability for the semicoke/polyaniline composite material. Additionally, the chemical bonds were generated between polyaniline macromoleculars and the aromatic molecules in semicoke, leading to the formation of a larger conjugated system. Hydrogen bonds were formed between N on polyaniline macromolecular chains and- OH on semicoke surface, between H of secondary ammonium salt on polyaniline chains and Ar-O-R on semicoke surface, which further strengthened their interface interaction. The interface interaction model of semicoke/polyaniline composite material was provided.

关 键 词：兰炭 聚苯胺 原位聚合 电容性能 界面作用 

分 类 号：O646[理学—物理化学]