CP@NiAl-LDH复合材料的制备及其超级电容器性能

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。

Synthesis and Supercapacitor Performance of Conductive Polymer@Aluminum Double Metal Hydroxide Composites

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.