The effect of the HClO4 oxidization of petroleum coke on the properties of the resulting activated carbon for use in supercapacitors
Source abstract
Abstract
Petroleum coke (PC) was modified by HClO4 oxidization. Activated carbons (ACs) were prepared using a mass ratio of KOH/modified PC of 3:1 (denoted OAC-3) and a KOH/PC mass ratio of 4:1 (denoted AC-4) for comparison. XRD, I2 adsorption, N2 adsorption and cyclic voltammograms were used to investigate the influence of HClO4 oxidization on the structure of the PC and the performance of the resultant AC. Results indicated that HClO4 oxidization increased the d(002) of microcrystalline PC from 0.344 to 0.353 nm and decreased Lc from 2.34 to 1.75 nm. The specific surface areas of AC-4 and OAC-3 were 2 929 and 3 058 m2/g, respectively. AC-4 and OAC-3 had a specific gravimetric capacitances of 361.3 and 392.7 F/g at a scan rate of 0.5 mV/s, respectively. A supercapacitor based on OAC-3 possessed a better power performance than that based on AC-4.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (16)
Show source-provided references
1. Carbon materials modified by plasma treatment as electrodes for supercapacitors [J]
2. Effect of microwave-treatment time on the properties of activated carbons for electrochemical capacitors [J]10.1016/S1872-5805(11)60084-X ↗
3. The simple preparation of a hierarchical porous carbon with high surface area for high performance supercapacitors[J]10.1016/S1872-5805(13)60074-8 ↗
4. Electrical double layer capacitors with activated sucrose-derived carbon electrodes [J]10.1016/j.carbon.2011.07.003 ↗
5. Effect of the KMnO4 concentration on the structure and electrochemical behavior of MnO2 [J]10.1007/s10853-011-6237-6 ↗
6. The effect of the polyaniline morphology on the performance of polyaniline supercapacitors [J]10.1007/s10008-004-0594-x ↗
7. Structure, surface morphology and electrochemical properties of brominated activated carbons[J]10.1016/j.carbon.2011.02.028 ↗
8. Effect of molecular grafting on the pore size distribution and the double layer capacitance of activated carbon for electrochemical double layer capacitors [J]10.1016/j.carbon.2010.11.055 ↗
9. Effect of nitrogen in carbon electrode on the supercapacitor performance [J]10.1016/j.cplett.2005.01.074 ↗
10. Chemical activation of high sulfur petroleum cokes by alkali metal compounds [J]10.1016/S0378-3820(00)00070-9 ↗
11. Effect of pre-carbonization of petroleum cokes on chemical activation process with KOH [J]10.1016/j.carbon.2005.04.009 ↗
12. Preparation of microporous activated carbon and its electrochemical performance for electric double layer capacitor [J]10.1016/j.jpcs.2009.03.001 ↗
13. Preparation of activated carbon from petroleum coke by KOH chemical activation for adsorption heat pump [J]10.1016/j.applthermaleng.2007.07.009 ↗
14. Study of the relationship between thermal conductivity and microcrystalline parameters of bulk graphite [J]
15. Surface characterization of electrochemically oxidized carbon fibers [J]10.1016/S0008-6223(99)00047-0 ↗
16. Superior electric double layer capacitors using ordered mesoporous carbons [J]10.1016/j.carbon.2005.07.029 ↗