Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytes
| Autor: | Silvia Real, Jesús Santos-Peña, Josefa Ortiz-Bustos, Manuel Cruz |
|---|---|
| Přispěvatelé: | Departamento de Tecnología Química y del Medio ambiente, ESCET, Universidad Rey Juan Carlos, Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas [La Plata] (INIFTA), Facultad de Ciencias Exactas [La Plata], Universidad Nacional de la Plata [Argentine] (UNLP)-Universidad Nacional de la Plata [Argentine] (UNLP), Departamento de Química Inorgànica e Ingeniería Química, Instituto Universitario de Química Fina y Nanoquímica, Universidad de Córdoba, Institut de Chimie et des Matériaux Paris-Est (ICMPE), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Physico-chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E), Université de Tours (UT), Université de Tours, Universidad de Córdoba = University of Córdoba [Córdoba], Institut de Chimie du CNRS (INC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY ELECTRODES Físico-Química Ciencia de los Polímeros Electroquímica Templated mesoporous carbons chemistry.chemical_element Nanotechnology 02 engineering and technology Electrolyte [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry Electrochemistry 7. Clean energy 01 natural sciences ELECTROCHEMICAL CAPACITORS Specific surface area medicine [CHIM]Chemical Sciences General Materials Science Electrodes ComputingMilieux_MISCELLANEOUS TEMPLATED MESOPOROUS CARBONS Ciencias Químicas General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry Chemical engineering chemistry Mechanics of Materials Electrode 0210 nano-technology Mesoporous material Electrochemical capacitors Carbon Electrochemical impedance spectroscopy CIENCIAS NATURALES Y EXACTAS Activated carbon medicine.drug Electrochemical window |
| Zdroj: | Microporous and Mesoporous Materials Microporous and Mesoporous Materials, Elsevier, 2017, 242, pp.221-230. ⟨10.1016/j.micromeso.2017.01.014⟩ |
| ISSN: | 1387-1811 |
| DOI: | 10.1016/j.micromeso.2017.01.014⟩ |
| Popis: | In search for new electrodes for electrochemical capacitors, two template mesoporous carbons (TMC) are prepared with the replica method by using Plugged Hexagonal Templated Silica (PHTS) and Mesostructured Cellular Foam (MCF) as hard templates. No subsequent activation after synthesis is carried out in order to correlate textural and electrochemical properties in neutral sulfate electrolytes. TMC show interesting textural and conductive properties for capacitor electrode purposes: specific surface areas higher than 1000 m2 g−1, and low D/G bands ratio in the Raman spectra. Mesopore presence accounts for the fast formation of the double layer and the decrease of resistive properties which implies increased power properties referred to activated carbons. Symmetric carbon/carbon devices can provide energy densities 7–9 Wh kg−1and maximal powers higher than 50 kW kg−1. These values compare well with 9 Wh kg−1and 26 Wh kg−1furnished by activated carbons. Nevertheless, such TMCs show two major issues for performing better than activated carbons in aqueous electrolyte capacitors. Firstly, they show surface carbon functionalities, narrowing the electrochemical window of the capacitor and decreasing the capacitor cycling life. Secondly, pore saturation is evidenced in these systems, unlike activated carbon, showing higher specific surface area and micropores content. Under prolonged cycling, our TMC electrode performance is poorer than that of activated carbon. However, mesoporosity positively affects the electrode response against increasing power. Beyond a power of 1.4 kW kg−1, only TMCs provide stable energy densities (>6.5 Wh kg−1), comparable or higher than those observed for activated carbons in corrosive electrolytes. Fil: Ortiz Bustos, Josefa. Universidad Rey Juan Carlos; España Fil: Real, Silvia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina Fil: Cruz, Manuel. Universidad de Córdoba; España Fil: Santos Peña, Jesùs. Laboratoire de Recherche Correspondant; Francia. Universite de Tours; Francia |
| Databáze: | OpenAIRE |
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