1. Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/NixCoyOz Nanosheets as a High‐Capacity Electrode Material for Supercapacitors.
- Author
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Cong, Shaoling, Yang, Yufei, He, Fan, Zhao, Jie, Li, Kanshe, Wang, Xiaoqin, Xiong, Shanxin, Wu, Yan, and Zhou, Anning
- Subjects
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NANOSTRUCTURED materials , *SUPERCAPACITORS , *CARBON nanofibers , *CARBON nanotubes , *ENERGY density , *POWER density , *NANOTUBES , *ELECTRIC metal-cutting - Abstract
The N‐doped porous carbon (NPC) /carbon micro‐nanotubes (CMNT) /NixCoyOz nanosheets with rich mesopores and 1.37 wt% nitrogen doping are successfully synthesized by a pyrolysis‐ionization‐precipitation combination process, using coal‐based polyaniline and nickelocene as original materials. Therein, most of the CMNT are upright CMTs and worm‐like curved CNTs, and a few are bamboo‐like tubes or carbon nanofibers. Moreover, many flower‐like aggregates assembled by spinel NiCo2O4 nanosheets are anchored on the surface of the NPC and CMNT. The NPC/CMNT/NixCoyOz exhibits a high specific capacitance and cycling stability, attributed to the large BET specific surface area (485 m2/g), suitable BET average pore size (2.3 nm), good hydrophilicity and wettability, and synergistic effects among three components. The assembled NPC/CMNT/NixCoyOz//AC asymmetric supercapacitor also demonstres a high specific capacitance of 120 F g−1 at a current density of 1 A g−1 and a high energy density of 16.7 Wh kg−1 at a power density of 500 W kg−1. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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