Novel layered polyaniline-poly(hydroquinone)/graphene film as supercapacitor electrode with enhanced rate performance and cycling stability

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:512

Article

Ren, Lijun¹  Zhang, Gaini¹  Lei, Ji²  Wang, Yan¹  Hu, Dengwei¹ 

[1] Baoji Univ Arts & Sci, Coll Chem & Chem Engn, Engn Res Ctr Adv Ferroelect Funct Mat, Key Lab Phytochem, Baoji 721013, Peoples R China

[2] Baoji Univ Arts & Sci, Coll Geog & Environm, Key Lab Disasters Monitoring & Mech Simulat, Baoji 721013, Peoples R China

关键词: Polyaniline;    Polyaniline-poly(hydroquinone)/graphene film;    Electrode material;    Pseudocapacitance;   

DOI  :  10.1016/j.jcis.2017.10.067

来源: Elsevier

【 摘 要 】

It is a challenge to fabricate polyaniline (PANI) materials with high rate performance and excellent stability. Herein a new special supercapacitor electrode material of polyaniline-poly(hydroquinone)/gra phene (PANI-PHQ/RGO) film with layered structure was prepared by chemical oxidative polymerization of aniline and hydroquinone (H(2)Q) in the presence of RGO hydrogel film. The synergistic effect and loose layered structure of the composite film facilitate fast diffusion and transportation of electrolyte ions through unimpeded channels during rapid charge-discharge process, resulting in high rate capability and stable cycling performance. As a result, the PANI-PHQ/RGO-61 film electrode exhibited 356 F g(-1) at a current density of 0.5 A g(-1), and high capacitance retention of 83% from 0.5 to 30 A g(-1). Moreover, it presented an excellent cycling stability with 94% of capacitance retention in comparison with 60% of pure PANI electrode and an outstanding Coulombic efficiency of 99% after 1000 cycles of galvanostatic charge-discharge. These superior electrocapacitive properties make it one of promising candidates for electrochemical energy storage. (C) 2017 Elsevier Inc. All rights reserved.

【 授权许可】

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