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N,P-Codoped Meso-/Microporous Carbon Derived from Biomass Materials via a Dual-Activation Strategy as High-Performance Electrodes for Deionization Capacitors
Nitrogen and phosphorus codoped meso-/microporous carbon derived from biomass materials has been designed and successfully fabricated as high-performance electrodes for deionization capacitors. The obtained materials were prepared by the pyrolysis of pomelo peel via a dual-activation strategy by usi...
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Published in: | ACS sustainable chemistry & engineering 2017-07, Vol.5 (7), p.5810-5819 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Nitrogen and phosphorus codoped meso-/microporous carbon derived from biomass materials has been designed and successfully fabricated as high-performance electrodes for deionization capacitors. The obtained materials were prepared by the pyrolysis of pomelo peel via a dual-activation strategy by using NH4H2PO4 and KHCO3. It is interesting that the as prepared nitrogen and phosphorus codoped meso-/microporous carbon possesses a high specific surface area of 2726 m2 g–1 with high percentage of mesopores of 52%. It has been demonstrated that the obtained electrode shows high specific capacitance, low inner resistance and good wettability. Consequently, the obtained electrode exhibits good deionization performance in a 300–1000 mg L–1 NaCl solution at 1.0–1.4 V with a flow rate of 20–60 mL min–1. The electrode reveals an ultrahigh deionization capacity of 20.78 mg g–1 at 1.4 V in a 1000 mg L–1 NaCl solution. The regeneration performance of the obtained electrode is good. The good performance is ascribed to the high specific surface area, superior micro-/mesoporous structure, and N,P-codoping. Hence, the nitrogen and phosphorus codoped meso-/microporous carbon should be a promising candidate as electrode material for deionization capacitors. The present work paves a way for the development of multiheteroatom codoped meso-/microporous carbon materials for electrochemical applications. |
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ISSN: | 2168-0485 2168-0485 |
DOI: | 10.1021/acssuschemeng.7b00551 |