- Title
- Nitrogen Doped Heat-Treated and Activated Hydrothermal Carbon: Examination of Electrochemical Performance Using Step Potential Electrochemical Spectroscopy
- Creator
- Latham, Kenneth G.; Donne, Scott W.
- Relation
- Journal of The Electrochemical Society Vol. 165, Issue 11, p. A2840-A2848
- Publisher Link
- http://dx.doi.org/10.1149/2.0811811jes
- Publisher
- Electrochemical Society
- Resource Type
- journal article
- Date
- 2018
- Description
- Step potential electrochemical spectroscopy (SPECS) has been applied to nitrogen-doped and non-doped hydrothermal carbons that have been activated or heat-treated at a range of temperatures. The highest surface area achieved was 422 m2.g−1 under heat-treatment at 600°C, and 2275 m2.g−1 using H3PO4 chemical activation at 800°C. The heat-treated series reported a maximum capacitance of 84 F.g−1 at 10 mV.s−1, whereas the activated series had a maximum capacitance of 306 F.g−1 at 10 mV.s−1. SPECS analysis revealed that pseudo-capacitance for the hydrothermal carbon doped with nitrogen was interlinked with the degree of oxygen functionality, and that decreasing the oxygen content of the surface increased the pseudo-capacitance contribution from nitrogen. Pseudo-capacitance also increased with activation from the incorporation of phosphate groups; however, the nitrogen-doped hydrothermal carbons displayed minimal double-layer capacitance (60.6 F.g−1 at 10 mV.s−1) despite having reasonable surface areas (1500–1600 m2.g−1).
- Subject
- hydrothermal carbon doped; nitrogen; carbon; chemical activation
- Identifier
- http://hdl.handle.net/1959.13/1448069
- Identifier
- uon:43305
- Identifier
- ISSN:0013-4651
- Language
- eng
- Reviewed
- Hits: 420
- Visitors: 420
- Downloads: 0