Open AccessFacile synthesis of hierarchically porous carbon for supercapacitor derived from water-soluble pitch
Author(s) -
Jinliang Zhang,
Junqing Liu,
Danmiao Kang,
Zhijiang Su,
Wenbin Liang,
Linjie Zhi
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/631/1/012101
Subject(s) - carbonization , gravimetric analysis , supercapacitor , capacitance , carbon fibers , specific surface area , materials science , porosity , chemical engineering , aqueous solution , activated carbon , potassium hydroxide , current density , potassium , analytical chemistry (journal) , electrode , chemistry , organic chemistry , composite material , scanning electron microscope , catalysis , adsorption , composite number , physics , quantum mechanics , engineering , metallurgy
Hierarchical porosity carbons have been synthesized via carbonization and activation using water-soluble pitch as carbon source. By further introducing potassium acetate as an activation agent, the obtained materials have a high specific BET surface area of 1108 m 2 g -1 with N, O and S doping. The effects of different activation temperatures on the pore structure and composition of the carbon were investigated. The obtained carbon samples exhibits a maximum gravimetric capacitance of 208 F g -1 when evaluated as an electrode material in 6 mol L -1 KOH aqueous solution and good rate capability of 69.5% retention at 20 A g -1 . Furthermore, it demonstrates good cyclic stability, showing a high capacitance retention of 96.3% over 10000 charge-discharge cycles at a current density of 2 A g -1 .