Electrochemical Synthesis of Porous Polyaniline Electrodes Using HKUST-1 as a Template and their Electrochemical Supercapacitor Property

Authors

Qiong LUAN, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237,;
Chun-feng XUE, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;Follow
Hong-ye ZHU, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
Fu-juan YANG, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
Xu-li MA, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
Xiao-gang HAO, Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;

Corresponding Author

Chun-feng XUE(cfxue@fudan.edu.cn);
Xu-li MA;
Xiao-gang HAO(xghao@tyut.edu.cn)

Abstract

Excellent electrode plays vital important role in the performance of supercapacitors. Polyaniline (PANI) with good conductivity is often used to prepare electrode. However, its available surface is limited and results in a poor supercapacitance in many cases. It is desirable to fabricate an electrode containing electroactive PANI with high surface area deriving from its porous structure. Here, the metal-organic framework (MOF) material with high surface area was selected as a hard template for synthesizing porous PANI. Microporous PANI composite electrodes (Micro-PANI/CC) were fabricated by depositing aniline on to carbon cloth (CC) pre-coated with MOF material of HKUST-1 using a unipolar pulse electro-polymerization method. At the same time, the PANI electrodes (PANI/CC) were also synthesized on blank carbon cloth for further comparatively studying their supercapacitor performances. Their microstructure and morphology were characterized by using XRD and SEM. Results indicate that the micro-PANI/CC electrode was composed of aggregated nanosized PANI spheres with pore structure. The cyclic voltammetry, constant current charge and discharge, impedance and stability tests were performed to evaluate the supercapacitor properties in 0.5 mol·L^-1 sulfuric acid electrolyte. Specific capacitances of micro-PANI/CC and PANI/CC electrodes were 895.6 F·g^-1 and 547.6 F·g^-1 at scan rate of 2 mV·s^-1 , respectively. At the same given conditions, the specific capacitance of micro-PANI/CC electrode was always 1.64 times higher than that of PANI/CC electrode. Meanwhile, the micro-PANI/CC electrode exhibited better rate capability, lower resistance and better stability of charge and discharge than PANI/CC. all the results imply that the microporous PANI templated from HKUST-1 could be a good candidate for the electrode of supercapacitors.

Graphical Abstract

Keywords

supercapacitor, HKUST-1, porous, polyaniline, unipolar pulse electro-polymerization method

DOI Link

https://doi.org/10.13208/j.electrochem.160201

Publication Date

2017-02-28

Online Available Date

2016-03-21

Revised Date

2016-03-12

Received Date

2016-02-01

Recommended Citation

Qiong LUAN, Chun-feng XUE, Hong-ye ZHU, Fu-juan YANG, Xu-li MA, Xiao-gang HAO. Electrochemical Synthesis of Porous Polyaniline Electrodes Using HKUST-1 as a Template and their Electrochemical Supercapacitor Property[J]. Journal of Electrochemistry, 2017 , 23(1): 13-20.
DOI: 10.13208/j.electrochem.160201
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss1/3