酸掺杂聚苯胺电极材料的制备及其电化学性能研究

Preparation of Acid-doped PANI Electrode Materials and Its Electrochemical Properties

关键词:  聚苯胺  电极材料  超级电容器  电化学性能

Key Words:PANI  electrode materials  supercapacitors  electrochemical properties

摘要:本研究以苯胺为单体，过硫酸铵为氧化剂，植酸为掺杂酸，与木质素磺酸盐进行化学聚合，通过原位化学氧化法合成了电子传导能力良好和电容性能优异的木质素磺酸盐/聚苯胺（LS/PANI）电极材料，采用场发射扫描电子显微镜（FESEM）、傅里叶变换红外光谱仪（FT-IR）和比表面积及孔径分析仪（BET）对LS/PANI电极材料进行分析表征；运用循环伏安、充放电、电化学阻抗等测试LS/PANI电极材料电化学性能。结果表明，LS/PANI电极材料具有良好的电容性能和较好的循环稳定性；在充放电0.5 A/g的电流密度下比电容可以达到509.3 F/g，在充放电电流密度为10 A/g时，循环5 000次后仍能保留63.23%的电容。

Abstract:In this study， aniline was used as the monomer， ammonium persulfate as the oxidizing agent， phytic acid as the dopant acid， and lignosulfonate were chemically polymerized to synthesize lignosulfonate/polyaniline （LS/PANI） electrode materials with the good electron-conducting ability and excellent capacitance. The LS/PANI electrode materials were analytically characterized by using Field Emission Scanning Electron Microscope （FESEM）， Fourier-transform Infrared Spectrometry （FT-IR）， and Brunauer-emmett-teller （BET）. The electrochemical properties of LS/PANI electrode materials were tested by cyclic voltammetry，alternating current impedance， etc. The results showed that LS/PANI electrode materials as the electrode material had good capacitance performance and good cycling stability. Their specific capacitance could reach 509.3 F/g at a current density of charge/discharge of 0.5 A/g， and the capacitance could be retained by 63.23% after cycling for 5 000 times at a charge/discharge current density of 10 A/g.