Enhancement of the Ni-Co hydroxide response as energy storage material by electrochemically reduced graphene oxide
| Autor: | R.G. Duarte, Alberto Adán-Más, T.M. Silva, M. F. Montemor, Liliane Guerlou-Demourgues |
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| Přispěvatelé: | Centro de Quimica Estrutural (CQE), Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), ESTBarreiro, Instituto Politécnico de Setúbal, ADEM, GI-MOSM, ISEL-Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa (IPL), This work has been performed in scope of International Doctoral Program in Functional Materials (IDS-FunMat, Erasmus Mundus) and funded by the European Union. We would like to express our gratitude to the Fundação para a Ciência e Tecnologia (FCT) for the funding under the contracts M-ERA.NET/0002/2012 and UID/QUI/00100/2013. |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Scanning electron microscope General Chemical Engineering Inorganic chemistry Oxide Electrochemically Reduced Graphene Oxide 02 engineering and technology Energy storage electrode 010402 general chemistry Electrochemistry 01 natural sciences 7. Clean energy law.invention Energy Storage Electrode chemistry.chemical_compound symbols.namesake Nickel-Cobalt Hydroxide Electrochemical Impedance Spectroscopy X-ray photoelectron spectroscopy law Electrochemically reduced graphene oxide Graphene Nickel-cobalt hydroxide [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Dielectric spectroscopy chemistry symbols Hydroxide 0210 nano-technology Raman spectroscopy Electrochemical impedance spectroscopy |
| Zdroj: | Electrochimica Acta Electrochimica Acta, Elsevier, 2017, 240, pp.323-340. ⟨10.1016/j.electacta.2017.04.070⟩ Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 0013-4686 |
| Popis: | International audience; Nickel-Cobalt double hydroxide materials are combined with Electrochemically Reduced Graphene Oxide (Er-GO) on top of Stainless Steel collectors by means of a one-step pulsed electrodeposition technique. Results show that, when Er-GO is integrated into the Nickel-Cobalt hydroxide matrix, there is an improvement of the electrochemical performance of the material, which shows increased capacity, stability and rate capability. As seen by Scanning Electron Microscopy (SEM), X-Ray Photoelectron Spectroscopy (XPS), Grazing-Incidence X-Ray Diffraction (GIXD) and Raman Spectroscopy, there is an excellent integration between the materials that leads to the enhanced electrochemical response. Capacity values up to 96 mA h/g and a 62% capacity retention after 5000 cycles were achieved. Moreover, scan rates up to 2000 mV/s without loss in electrochemical response were possible proving its good rate capabilities. A detailed study of the cycling degradation phenomena was also done by means of electrochemical impedance spectroscopy (EIS). Thus, this novel electrodeposited material serves as an excellent material for energy storage applications. |
| Databáze: | OpenAIRE |
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