Synthesis and Supercapacitor Performance of Conductive Polymer@Nickel and Aluminum Double Metal Hydroxide Composites
普颖慧 中国石油大学(华东)理学院, 青岛 266580  
杜东峰 中国石油大学(华东)理学院, 青岛 266580 dudongfeng0512@126.com 
于世凡 中国石油大学(华东)理学院, 青岛 266580  
邢伟 中国石油大学(华东)理学院, 青岛 266580 xingwei@upc.edu.cn 
摘要: 通过采用简易温和的水热条件制备导电聚合物@镍铝层状双金属氢氧化物复合材料(CP@NiAl-LDH),构建电子/离子的高速传输纳米通道,利用SEM和XRD对复合材料结构形貌进行表征。电化学性能测试结果表明,导电聚合物为复合材料提供一定的赝电容,促进电荷的快速转移,使CP@NiAl-LDH的电容性能得以显著提升。PPy@LDH具有最好的电容性能,在1 A·g-1的电流密度下,其比容量高达3 010.3 F·g-1,当电流密度升高到20 A·g-1时,其比电容保持率为73.1%,表现出优异的倍率性能;同时,在10 A·g-1的电流密度下10 000次充放电循环后仍具有88.8%的比容量保持率,具有优异的循环稳定性。这主要归功于NiAl-LDH与导电聚合物之间的协同增强效应。
关键词: 复合材料  导电聚合物  层状双金属氢氧化物  超级电容器
基金项目: 国家自然科学基金(No.21476264)、泰山学者青年专家计划(No.tsqn20161017)、山东省自然科学基金重大基础研究项目(No.ZR201801280009)、中央高校基础研究经费(No.18CX05007A)和国家级大学生创新创业训练计划(No.201810425067)资助。
Abstract: The composite materials of conductive polymer@nickel and aluminum double metal hydroxide were prepared using the simple and mild hydrothermal conditions, constructing the nano-channels for high-speed transmission of electrons and electrolyte. The morphologies and microstructures of the composites were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The results of electrochemical performance showed that the conductive polymer could provide some pseudocapacitance for the composite material, promote the rapid transfer of charge, and improve significantly the capacitive performance of CP@NiAl-LDH. The polypyrrole@LDH had the best performance of capacitance, the specific capacity could reach 3 010.3 F·g-1 at the current density of 1 A·g-1, and the specific capacitance remained 73.1% when the current density increased to 20 A·g-1, exhibiting excellent rate performance. Furthermore, it also displayed excellent cycling stability with a specific capacity retention rate of 88.8% after 10 000 times of charge-discharge cycles at the current density of 10 A·g-1. These were mainly ascribed to the synergetic enhancement effect among NiAl-LDH and conductive polymer.
Keywords: hybrid materials  conductive polymer  layered double hydroxide  supercapacitor
投稿时间:2018-06-13 修订日期:2018-08-02
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