KOH direct treatment of kombucha and in situ activation to prepare hierarchical porous carbon for high-performance supercapacitor electrodes

被引:30
作者
Dai, Changchao [1 ]
Wan, Jiafeng [1 ]
Geng, Weidan [1 ]
Song, Shijiao [1 ]
Ma, Fangwei [1 ]
Shao, Jinqiu [1 ]
机构
[1] Heilongjiang Univ, Sch Chem & Mat Sci, Harbin 150080, Heilongjiang, Peoples R China
基金
中国国家自然科学基金;
关键词
Porous carbon; KOH activation; Kombucha; High performance; Supercapacitor; DOUBLE-LAYER CAPACITORS; NANOPOROUS CARBONS; ELECTROCHEMICAL CAPACITORS; ENERGY-STORAGE; FRAMEWORK; NANOSHEETS; GRAPHENE; NANOARCHITECTURES; CELLULOSE; POLYMER;
D O I
10.1007/s10008-017-3631-2
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Kombucha, a renewable biomass, has been successfully utilized as an accessible carbon source to fabricate kombucha-derived hierarchical porous carbon (KHPC) by KOH direct treatment and in situ activation. The prepared KHPC shows an interconnected hierarchical porous structure, a pore volume of 0.41 cm(3) g(-1), and a specific surface area of 917 m(2) g(-1). Due to the multiple synergistic effects of these advantages, the KHPC-3 exhibits a high specific capacitance of 326 F g(-1) at a current density of 1 A g(-1) in 6 M KOH, good rate capability of 82% retention from 1 to 20 A g(-1), and cycling performance with 91.3% retention over 5000 cycles. Moreover, the KHPC-3 symmetric supercapacitor reveals a good energy density of 20.97 Wh kg(-1) at a power density of 871.2 W kg(-1) and retains 8.08 Wh kg(-1) at 6330 W kg(-1) in 1 M Na2SO4 electrolyte. Therefore, the KHPC obtained via the simple synthesis process shows great promise as an electrode material in energy storage devices.
引用
收藏
页码:2929 / 2938
页数:10
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