期刊
CHEMICAL PHYSICS LETTERS
卷 747, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.cplett.2020.137325
关键词
Energy storage and conversion; Biomaterials; Hierarchical porous; Cotinus coggygria flowers; Composite activator
Hierarchical porous biochar with large BET surface area of 959.04 cm(2) g(-1) was synthesized by using a novel composite activator from cotinus coggygria flowers. The biochar delivers excellent specific capacitance of 413.5 F g(-1) at current density of 0.5 A g(-1) in 1 M H2SO4 electrolyte and a well reversible capacitance of 279.9 F g(-1) at current density of 5 A g(-1) in 6 M KOH electrolyte after 36,000 cycles. The excellent specific capacitance and the stable cycling performance benefit from the synergism of the composite activator. This provides a meaningful reference for the synthesis of supercapacitor biomaterials.
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