Flower-like carbon cathode prepared via in situ assembly for Zn-ion hybrid supercapacitors

被引:101
作者
Fan, Huailin [1 ]
Hu, Xun [1 ]
Zhang, Shu [2 ]
Xu, Zhixiang [3 ]
Gao, Guoming [1 ]
Zheng, Yan [1 ]
Hu, Guangzhi [4 ]
Chen, Qifeng [1 ]
AlGarni, Tahani Saad [5 ]
Luque, Rafael [6 ,7 ]
机构
[1] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China
[2] Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Peoples R China
[3] Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[4] Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450000, Peoples R China
[5] King Saud Univ, Coll Sci, Chem Dept, Riyadh 11451, Saudi Arabia
[6] Dept Quim Organ, Campus Rabanales,Edificio Marie Curie C-3, Cordoba, Spain
[7] RUDN Univ, Peoples Friendship Univ Russia, 6 Miklukho Maklaya Str, Moscow, Russia
基金
中国国家自然科学基金;
关键词
Flower-like carbon; In situ assembly; Carbon nanosheets; Zn-ion hybrid supercapacitors; DOPED POROUS CARBON; PERFORMANCE; NANOSHEETS; BORON; LIFE;
D O I
10.1016/j.carbon.2021.04.093
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Three-dimensional (3D) carbon from the assembly of low-dimensionally isolated segments have attracted much attention as these carbon materials not only inherit the superiorities of individual building blocks but also acquire new synergic effects. However, it remains a big issue to assemble isolated carbon segments into a 3D carbon superstructure by a facile strategy. Herein, the spheroidizing growth of hydrothermal carbon as an assembly drive and in situ formed melamine cyanurate nanosheets as structure-directing agent are combined to design and assemble B, N and O co-doped carbon flower as a promising cathode for Zn2+ hybrids supercapacitors. The flower-like carbon exhibits large nanosheets area, interlinked conductive network, nanoscale architecture and rich electroactive sites. Boron doping enhances the chemical adsorption of SO42- onto the carbon cathode surface and the reaction between oxygen dopant and Zn ions added additional capacity for Zn-ion supercapacitors. The resulting device achieves an energy density of 119.7 Wh/kg at 890 W/kg and maintains 63.5 Wh/kg even at a power density of 16.5 kW/kg. (C) 2021 Elsevier Ltd. All rights reserved.
引用
收藏
页码:254 / 264
页数:11
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