Preparation of porous carbon electrodes from semen cassiae for high-performance electric double-layer capacitors

A series of sponge-like hierarchical porous carbons are prepared using semen cassiae as the precursor and potassium oxalate monohydrate as the activation agent. These sponge-like carbon materials have high surface areas, wide distributions of pore size, and the appropriate forms of nitrogen/oxygen d...

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Bibliographic Details
Published inNew journal of chemistry Vol. 42; no. 9; pp. 6763 - 6769
Main Authors Wei, Ji-Shi, Wan, Suige, Zhang, Peng, Ding, Hui, Chen, Xiao-Bo, Xiong, Huan-Ming, Gao, Shuyan, Wei, Xianjun
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 2018
Subjects
Capacitance
Capacitors
Carbon
Cycles
Density
Electrodes
Flux density
Pore size
Porosity
Potassium oxalate monohydrate
Semen
Stability
Sulfuric acid
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Summary:A series of sponge-like hierarchical porous carbons are prepared using semen cassiae as the precursor and potassium oxalate monohydrate as the activation agent. These sponge-like carbon materials have high surface areas, wide distributions of pore size, and the appropriate forms of nitrogen/oxygen derivatives. All these advantages in structures and surface states contribute to the outstanding performances of such materials as electrodes for high performance electric double-layer capacitors, which include high specific capacitance, high cycling stability, and high energy density. For example, the optimal sample exhibits a high specific capacitance of 401 F g −1 , excellent cycling stability (94.5% retention after 10 000 cycles), high energy density (12.01 W h kg −1 ) and a high power density (10 200 W kg −1 ) in 1 M H 2 SO 4 solution.
ISSN:1144-0546
1369-9261
DOI:10.1039/C7NJ04922F