Gelines Moreno-Fernandez

Gelines Moreno-Fernandez
CIC Energigune · Instituto de Ciencia de Materiales de Madrid

Dr.

About

20
Publications
2,599
Reads
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189
Citations
Additional affiliations
March 2018 - present
CIC Energigune
Position
  • PostDoc Position
February 2017 - December 2017
Spanish National Research Council
Position
  • Researcher
September 2015 - November 2015
Helmholtz-Institut Ulm
Position
  • PhD Student
Education
December 2012 - December 2016
Universidad Autónoma de Madrid
Field of study
  • Types of electrolytes for carbon-based supercapacitors
September 2011 - July 2012
Universidad Autónoma de Madrid
Field of study
  • Energy and fuels for the future
September 2004 - June 2010
Universidad de Valladolid
Field of study
  • Physics

Publications

Publications (20)
Article
Full-text available
The increasing demand for electrical energy storage requires the exploration of alternative battery chemistries that overcome the limitations of the current state-of-the-art lithium-ion batteries. In this scenario, lithium-sulfur batteries stand out for their high theoretical energy density. However, several inherent limitations still hinder their...
Article
Full-text available
Microstructured nitrogen-doped graphene-Sn synthetized in one step for high performance and long-term cycling stability lithium-ion capacitors.
Article
Electrical double-layer capacitors bring numerous strengths to the energy storage landscape but have limited use due to their high unit energy cost and low specific energy. Water-in-salt electrolytes have been recently purported as an option to provide more affordable energy storage, but high viscosity and limited conductivity hinder their direct u...
Article
In this work we report an easy and ecofriendly approach for the preparation of activated carbon‐graphene composites using cigarette filter wastes as precursor and evaluate its potential application as electrodes for high energy electrochemical capacitors. Graphene‐biowaste derived carbon composites are tested as active electrode materials in three...
Article
Full-text available
Spray gun machine was used to deposit high surface area supercapacitor electrodes using green non‐toxic aqueous dispersions based on three kinds of high specific surface area nanostructured carbon materials: activated graphene (a‐rGO) and activated carbon (AC). Tuning spray conditions and dispersion formulation allowed to achieve good adhesion to s...
Article
Full-text available
The Cover Feature illustrates the ultrafast charge of a dual graphene lithium‐ion capacitor. The power density of this device is boosted due to the flat‐shaped morphology of the active materials and the phosphate functionalization of the negative electrode. More information can be found in the Article by G. Moreno‐Fernández, D. Carriazo and co‐work...
Article
Full-text available
Ball-milling under either air or argon is explored as a facile way to adjust the textural properties, surface chemistry and morphology of activated reduced graphene oxide to the requirements for optimum electrode materials in electrical double layer capacitors operating in aqueous (KOH), organic (tetraethylammonium tetrafluoroborate in acetonitrile...
Article
Full-text available
The mechanisms behind enhanced charge storage of P-functionalized carbons are unraveled for the first time using non-porous graphene oxide treated with phosphoric acid and annealed at either 400 or 800 °C. The electrochemical study in 1M H2SO4 reveals that phosphorus groups boost charge storage and electrochemical stability, with more effect for th...
Article
Full-text available
Herein we report an easy, ecofriendly and cheap synthetic approach for the preparation of carbon composites from the pyrolysis and activation of coffee waste and graphene oxide, and their evaluation as potential electrodes for lithium ion capacitors (LICs). An exhaustive optimization of some important parameters such as particle size, electronic co...
Article
Full-text available
Correction for ‘Flat-shaped carbon–graphene microcomposites as electrodes for high energy supercapacitors’ by Gelines Moreno-Fernández et al. , J. Mater. Chem. A , 2019, 7 , 14646–14655.
Article
Full-text available
Herein, we report a simple approach for the preparation of phosphate-functionalized carbonaceous graphene-based composites. The homogeneous deposition of a thin layer of phenolic resin on the surface of graphene oxide (GO) sheets was achieved using phosphoric acid as the polymerization catalyst and functionalization agent. Subsequent pyrolysis of t...
Article
Full-text available
This study is essentially based on innovative electrolytes such as the organic salt N-methyl-N-butylpyrrolidinium tetrafluoroborate (Pyr14BF4) dissolved in propylene carbonate (PC) and the pure ionic liquid (N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide (Pyr14TFSI) and its solution in PC. Activated carbon cloths were used as sel...
Article
Full-text available
Activated carbon fibers (ACF) are interesting candidates for electrodes in electrochemical energy storage devices; however, one major drawback for practical application is their low density. In the present work, monoliths were synthesized from two different ACFs, reaching 3 times higher densities than the original ACFs’ apparent densities. The poro...
Article
Full-text available
Carbon monoliths are prepared by combining two carbon phases. A major phase is activated anthracite, which provides microporosity and a large surface area. The other phase is a carbonized polymer that provides self-consistency and contributes to densifying the monolith. Different degrees of anthracite activation and different contents of the two ph...
Article
Full-text available
The results obtained for binder-free electrodes made of carbon monoliths with narrow micropore size distributions confirm that the specific capacitance in the electrolyte (C2H5)4NBF4/acetonitrile does not depend significantly on the micropore size and support the foregoing constant result of 0.094±0.011 F/m2
Article
Full-text available
Specific capacitance of carbons in aqueous KOH electrolyte seems to have two contributions, a double-layer capacitance and a pseudocapacitance. Moreover, the specific capacitance increases as the specific surface area does. Here, we report that the pseudocapacitance is associated with the K+ ion and the double-layer capacitance with both K+ and OH–...

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Projects

Projects (3)
Archived project
Study different types of binder-less carbon electrodes for supercapacitors. The electrodes are carbon monoliths and carbon cloths.
Archived project
Study the relation ion size- pore size for different electrolytes and binder-less carbon electrodes. Estimate the ion size of the electrolytes and their impact on the supercapacitor performance.