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All‐Carbon Electrode Directly Derived from Wax Gourd for Supercapacitor
Author(s) -
Du Juan,
Yu Yifeng,
Zhang Yue,
Liu Lei,
Chen Chunlin,
Chen Aibing
Publication year - 2019
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201800798
Subject(s) - supercapacitor , monolith , capacitance , materials science , carbonization , wax , carbon fibers , electrode , fabrication , gourd , porosity , composite material , chemical engineering , microbead (research) , nanotechnology , chemistry , catalysis , organic chemistry , scanning electron microscope , medicine , biochemistry , alternative medicine , food science , pathology , composite number , engineering
Here an efficient preparation of porous carbon monolith by freeze drying of wax gourd and following carbonization without any activating processes is reported. The obtained porous carbon monolith features high specific surface area, low density, and excellent mechanical strength. Directly using as an all‐carbon electrode without any binder and conductive additives, it displays an outstanding performance with specific capacitance of 357 F g −1 at 0.5 A g −1 . Fabrication as a symmetric supercapacitor, its capacitance retains 78.5% after 10 000 charge–discharge cycles at 2 A g −1 .