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Facile Synthesis of Nitrogen and Oxygen Co-Doped Clews of Carbon Nanobelts for Supercapacitors with Excellent Rate Performance

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Shenzhen Key Laboratory of Special Functional Materials & Shenzhen Engineering Laboratory for Advance Technology of Ceramics, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
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JANUS (Dongguan) Precision Components Co., Ltd., Dongguan 523841, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(4), 556; https://doi.org/10.3390/ma11040556
Received: 14 March 2018 / Revised: 28 March 2018 / Accepted: 31 March 2018 / Published: 4 April 2018
(This article belongs to the Section Carbon Materials)
Facile synthesis of carbon materials with high heteroatom content, large specific surface area (SSA) and hierarchical porous structure is critical for energy storage applications. In this study, nitrogen and oxygen co-doped clews of carbon nanobelts (NCNBs) with hierarchical porous structures are successfully prepared by a carbonization and subsequent activation by using ladder polymer of hydroquinone and formaldehyde (LPHF) as the precursor and ammonia as the activating agent. The hierarchical porous structures and ultra-high SSA (up to 2994 m2 g−1) can effectively facilitate the exchange and transportation of electrons and ions. Moreover, suitable heteroatom content is believed to modify the wettability of the carbon material. The as-prepared activated NCNBs-60 (the NCNBs activated by ammonia at 950 °C for 60 min) possess a high capacitance of 282 F g−1 at the current density of 0.25 A g−1, NCNBs-45 (the NCNBs are activated by ammonia at 950 °C for 45 min) and show an excellent capacity retention of 50.2% when the current density increase from 0.25 to 150 A g−1. Moreover, the NCNBs-45 electrode exhibits superior electrochemical stability with 96.2% capacity retention after 10,000 cycles at 5.0 A g−1. The newly prepared NCNBs thus show great potential in the field of energy storage. View Full-Text
Keywords: co-doped; carbon nanobelts; hierarchical; supercapacitors co-doped; carbon nanobelts; hierarchical; supercapacitors
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MDPI and ACS Style

Yu, L.; Zeng, S.; Zeng, X.; Li, X.; Wu, H.; Yao, Y.; Tu, W.; Zou, J. Facile Synthesis of Nitrogen and Oxygen Co-Doped Clews of Carbon Nanobelts for Supercapacitors with Excellent Rate Performance. Materials 2018, 11, 556.

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