N-Doped Hierarchical Continuous Hollow Thin Porous Carbon Nanostructure for High-Performance Flexible Gel-Type Symmetric Supercapacitors

被引:10
作者
Cheng, Po-Yuan [1 ]
Cheng, Heng-Yi [1 ]
Huang, Chun-Lung [1 ]
Chen, Yu-An [1 ]
Hsieh, Cheng-Ting [1 ]
Lu, Shih-Yuan [1 ]
机构
[1] Natl Tsing Hua Univ, Dept Chem Engn, 101,Sect 2,Kuang Fu Rd, Hsinchu 30013, Taiwan
关键词
mesoporous silica sphere; hierarchical carbon nanostructure; supercapacitor; flexible substrate; gel-type electrolyte; carbon cloth; EFFICIENT ELECTRODE; MESOPOROUS CARBON; GRAPHENE; SPHERES; NANOSPHERES; POLY(O-PHENYLENEDIAMINE); POLYANILINE; NANOTUBES; NANOWIRES; COMPOSITE;
D O I
10.1021/acssuschemeng.9b02762
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A N-doped hierarchical porous carbon nanostructure (NHPCN) was created on a carbon cloth (CC), through a templating process using self-assembled mesoporous silica spheres as the template, to fabricate high-performance flexible geltype symmetric supercapacitors (NHPCN@CC//NHPCN@CC) . The NHPCN@ CC//NHPCN@CC cell exhibited outstanding capacitive performances, giving a decent energy density of 10.3 W h kg(-1) at a high power density of 10 kW kg(-1) and reaching a high energy density of 24.3 W h kg(-1) at a power density of 0.5 kW kg(-1), outperforming most carbon-based gel-type, symmetric supercapacitors. This success may be attributed to the continuous hollow, thin features of the NHPCN, with the hollow structure enabling local, fast adsorption/desorption of electrolyte ions for generation of electric double-layer capacitances and the thin carbon shells offering large amounts of exposed surface areas for accommodation of electric double- layer capacitances and pseudo-capacitances. The NHPCN@CC//NHPCN@CC cell exhibited a high specific capacitance retention rate of 85% after 8000 cycle operations at 10 A g(-1), showing its good cycling stability. The mechanical robustness of the NHPCN@CC//NHPCN@CC cell was also excellent, with the energy and power densities well-maintained even under a large bending angle of 135 degrees.
引用
收藏
页码:17020 / 17029
页数:19
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