High Performance N-Doped Carbon Electrodes Obtained via Hydrothermal Carbonization of Macroalgae for Supercapacitor Applications
ABSTRACT: The conversion of bio-waste into useful porous carbons constitutes a very attractive approach to contribute to the development of sustainable energy economy, even more as they can be used in energy storage devices. Here we report the synthesis of N-doped carbons from hydrothermal carboniza...
- Autores:
-
López López, Diana Patricia
Ren, Meng
Jia, Ziyang
Tian, Zhongwei
Cai, Jinjun
Titirici, María Magdalena
A. Belen, Jorge
- Tipo de recurso:
- Article of investigation
- Fecha de publicación:
- 2018
- Institución:
- Universidad de Antioquia
- Repositorio:
- Repositorio UdeA
- Idioma:
- eng
- OAI Identifier:
- oai:bibliotecadigital.udea.edu.co:10495/39811
- Acceso en línea:
- https://hdl.handle.net/10495/39811
- Palabra clave:
- Hydrothermal carbonization
Energy storage
Electrodos de carbono
Electrodes, Carbon
Enteromorpha prolifera
http://aims.fao.org/aos/agrovoc/c_49511
http://id.loc.gov/authorities/subjects/sh2013001120
http://id.loc.gov/authorities/subjects/sh85043149
- Rights
- openAccess
- License
- https://creativecommons.org/licenses/by/4.0/
| Summary: | ABSTRACT: The conversion of bio-waste into useful porous carbons constitutes a very attractive approach to contribute to the development of sustainable energy economy, even more as they can be used in energy storage devices. Here we report the synthesis of N-doped carbons from hydrothermal carbonization of macroalgae, Enteromorpha prolifera (EP), followed by a mild KOH activation step. The obtained N-doped carbons exhibited surface areas of up to ~2000 m2/g with N-loadings varied in the range of 1.4~2.9 at%. By modifying activation temperature, we were able to tune the surface chemistry and porosity, achieving excellent control of their properties. The specific capacitance reached values of up to 200 F/g at 1 A/g in 6 M KOH for the sample obtained at activation temperature of 7008C (AHC-700). The symmetric supercapacitor using the sample activated at 8008C (AHC-800) as electrodes exhibited the highest cycling stability of the samples studied in this work, with capacitance retention of up to 96% at 10 A/g, even after 10,000 cycles, constituting the highest reported for biomass-derived carbon electrodes. These results show the great potential of N-doped carbons as electrodes for supercapacitors and confirm the excellent electrochemical properties of biomass-derived carbons in energy storage technologies. |
|---|