Preparation of pitch-based carbon materials using a template and an orthogonal array design for super capacitors

Micro & nano letters

article

Cungui Zhong¹  Qing Cao¹  Xiaoling Xie¹  Shilei Gong¹  Chunmin Zhou¹  Ying Wang¹ 

[1] College of Chemistry and Chemical Engineering, Taiyuan University of Technology

关键词: coal tar;    supercapacitors;    electrochemical electrodes;    carbon;    nanostructured materials;    electrolytes;    adsorption;    desorption;    texture;    transmission electron microscopy;    current density;    alumina;    pitch-based carbon materials;    orthogonal array design;    template array design;    supercapacitors;    coal tar pitches;    capacitance;    nanosized oxides;    potassium hydroxide activation method;    electrochemical performance;    electrode materials;    single electrode capacitor;    KOH electrolyte;    surface area;    N2 adsorption-desorption analysis;    textural characterisation;    transmission electron microscopy;    activation temperature;    current density;    temperature 700 degC;    C-Al2O3;   

DOI  :  10.1049/mnl.2014.0493

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Coal tar pitches (CTPs) are used as a supercapacitor precursor because they are of low cost and produce high carbon yields. In this reported work, a simple and feasible method for the fabrication of pitch-based carbon electrode materials with high capacitance was established using nanosized oxides as a template and the potassium hydroxide (KOH) activation method. The preparation conditions were optimised using an orthogonal array design. The electrochemical performance of the electrode materials was examined by constructing a single electrode capacitor in 6 mol l −1 KOH electrolyte; specific surface area was determined by N 2 adsorption–desorption analysis and textural characterisation was conducted by transmission electron microscopy. Results showed that the synthetic carbon material possessed the highest iodine adsorption value of 2238 mg g −1 under optimum conditions (Al 2 O 3 used as the template, an activation temperature of 700°C and a CTP/template mass ratio of 1:1), a high capacitance of 258 F g −1 at a current density of 0.5 A g −1 and good cycle stability.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND