Enhancement of the Ni-Co hydroxide response as energy storage material by electrochemically reduced graphene oxide
ADÁN-MÁS, Alberto
Centro de Quimica Estrutural [CQE]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centro de Quimica Estrutural [CQE]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
SILVA, Teresa
Centro de Quimica Estrutural [CQE]
ADEM, GI-MOSM, ISEL-Instituto Superior de Engenharia de Lisboa
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Centro de Quimica Estrutural [CQE]
ADEM, GI-MOSM, ISEL-Instituto Superior de Engenharia de Lisboa
ADÁN-MÁS, Alberto
Centro de Quimica Estrutural [CQE]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centro de Quimica Estrutural [CQE]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
SILVA, Teresa
Centro de Quimica Estrutural [CQE]
ADEM, GI-MOSM, ISEL-Instituto Superior de Engenharia de Lisboa
< Reduce
Centro de Quimica Estrutural [CQE]
ADEM, GI-MOSM, ISEL-Instituto Superior de Engenharia de Lisboa
Language
en
Article de revue
This item was published in
Electrochimica Acta. 2017-06, vol. 240, p. 323-340
Elsevier
English Abstract
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, ...Read more >
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.Read less <
English Keywords
Electrochemically reduced graphene oxide
Nickel-cobalt hydroxide
Energy storage electrode
Electrochemical impedance spectroscopy
Origin
Hal imported