MATEC Web Conf.
Volume 238, 2018International Conference on Novel Functional Materials (ICNFM2018)
|Number of page(s)||5|
|Section||Materials for Energy Storage and Supply|
|Published online||26 November 2018|
Research on super capacitance properties of modified activated carbon in sodium sulfate electrolyte
School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China
2 School of Materials Science and Engineering, Dalian Jiaotong University, Dalian, 116028, China
3 Tangshan vocational college of science and technology, Tangshan, 063000, China
a Corresponding author: E-mail:firstname.lastname@example.org
In order to improve the specific capacity and energy density of activated carbon electrode materials activated carbon was modified by surface treatment using hydrogen peroxide. The modified carbons were characterized the changes of pore structure and functional groups before and after modification by N2 adsorption-desorption isotherms and FTIR spectroscopy. The three electrode system was assembled with modified activated carbon as electrode materials and Na2SO4 as the electrolyte. The influence of surface modification on the performance of EDLCs was studied by galvanostatic charge-discharge, cyclic voltammetry, and alternating current impedance. The results show that the surface chemistry of the modified activated carbon material has changed, the specific surface area has changed and the pore size has not changed much with the introduction of new oxygen-containing functional groups. The specific capacity of the activated carbon material modified by 5h is 75F/g, which is 86.1% higher than that before the modification. It can be seen that the change of functional group after the modification of activated carbon can help to increase the specific capacity.
© The Authors, published by EDP Sciences, 2018
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