Abstract
As a new environment-friendly green device for energy storage, supercapacitor has been favored for its advantages of long service life and huge power density. As the material produced electrode of double-layer supercapacitors, much attention are given arise to carbon materials owning to their wide source, low price, environmental protection and other characteristics, especially biomass-based carbon materials. In this paper, coconut husk was used as raw material, which was carbonized by common hydrothermal pre-treatment and high-temperature pyrolysis carbonization. The materials obtained under different reaction conditions were tested in three-electrode system. The electrochemical tests implied that the carbonized coconut husk has the best energy storage characteristics when the pre-treatment time was 24 h and the activator was KOH. This study explored a carbon electrode derived by a new raw biomass material for energy storage in supercapacitors.
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