A5028213622- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Conducting polymers and applications
- Advanced Battery Technologies Research
- Electrochemical sensors and biosensors
- Electrospun Nanofibers in Biomedical Applications
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- Graphene research and applications
- Carbon Nanotubes in Composites
- Advanced Sensor and Energy Harvesting Materials
CIC energiGUNE
2019-2025
Parque Tecnológico de la Salud
2019-2020
Consejo Superior de Investigaciones Científicas
2014-2018
Instituto de Ciencia de Materiales de Madrid
2015-2018
Herein we report an easy, ecofriendly and cheap synthetic approach for the preparation of carbon composites from pyrolysis activation coffee waste graphene oxide, their evaluation as potential electrodes lithium ion capacitors (LICs). An exhaustive optimization some important parameters such particle size, electronic conductivity or mass loading has been done battery-type electrode; whereas optimum combination specific surface area pore size distribution were also investigated capacitor-type...
The results obtained for binder-free electrodes made of carbon monoliths with narrow micropore size distributions confirm that the specific capacitance in electrolyte (C2H5)4NBF4/acetonitrile does not depend significantly on and support foregoing constant result 0.094 ± 0.011 F m(-2).
In this work we present the development and optimization of a graphene-embedded Sn-based material an activated carbon/lithium iron phosphate composite for high-performing hybrid lithium-ion capacitor (LIC).
Abstract The development of alternative energy storage technologies such as sodium‐ion hybrid capacitors, which do not rely on critical raw materials cobalt or nickel, for the replacement conventional lithium‐ion batteries some niche applications, is extremely important to successfully achieve a sustainable in our planet. In this work, we introduce novel capacitor system formed by combination an optimized nanostructured composite material containing reduced graphene oxide and tin...
Specific capacitance of carbons in aqueous KOH electrolyte seems to have two contributions, a double-layer and pseudocapacitance. Moreover, the specific increases as surface area does. Here, we report that pseudocapacitance is associated with K+ ion both OH– ions. The former dominates real two-electrode supercapacitor. Two microporous carbon monoliths areas similar for micropores below 0.63 nm but different larger are chosen. There correlation between due those ions sizes above certain...
Abstract Herein, we report an easy approach for the preparation of graphene‐based materials suitable as electrodes lithium‐ion capacitors (LICs). To best our knowledge, this is first time that phosphorus‐functionalized graphene oxide (rGO800‐P) used negative (battery‐type) electrode in LICs technology. An activated carbon derived from pyrolysis graphene‐carbon composite served positive (capacitor‐type) electrode. While phosphorus functionalization on enables fast Li + kinetics during...
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. electrochemical study in 1 M H2SO4 reveals that phosphorus groups boost stability, more effect higher annealing temperature. Annealing °C also leads to material withstanding 60,000 charge-discharge cycles no capacitance loss 1.5 V. improvement performance is shown be mainly governed by...
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 requirements for optimum electrode materials in electrical double layer capacitors operating aqueous (KOH), organic (tetraethylammonium tetrafluoroborate acetonitrile) ionic liquid (1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) electrolytes. evidenced specifically remove excessively large pores through...
Lithium-sulfur batteries (LSBs) have emerged as promising alternatives to replace Li-ion technology in lightweight applications, but they still face some important challenges that hinder their commercialization. To overcome them, several optimization strategies focusing on each battery component been investigated. In this work, we explored the symbiotic combination of an optimized high-sulfur loading graphene-containing cathode with a novel sparingly solvating electrolyte (SSE) consisting...
Graphene–carbon composites with flat-shaped microstructures exhibited superior electrochemical performances as electrodes for supercapacitors in different electrolytes.
Abstract The increasing demand for electrical energy storage requires the exploration of alternative battery chemistries that overcome limitations current state‐of‐the‐art lithium‐ion batteries. In this scenario, lithium‐sulfur batteries stand out their high theoretical density. However, several inherent still hinder commercialization. work, we report synthesis and study two high‐performance activated carbon‐based materials allow to most challenging sulfur electrodes, i. e., low electronic...
Activated carbon fibers (ACF) are interesting candidates for electrodes in electrochemical energy storage devices; however, one major drawback practical application is their low density. In the present work, monoliths were synthesized from two different ACFs, reaching 3 times higher densities than original ACFs’ apparent densities. The porosity of was only slightly decreased with respect to pristine employed PVDC binder developing additional upon carbonization. ACF essentially microporous...
Microstructured nitrogen-doped graphene-Sn synthetized in one step for high performance and long-term cycling stability lithium-ion capacitors.
Abstract In this work we report an easy and ecofriendly approach for the preparation of activated carbon‐graphene composites using cigarette filter wastes as precursor evaluate its potential application electrodes high energy electrochemical capacitors. Graphene‐biowaste derived carbon are tested active electrode materials in three different electrolytes (ammonium salt‐based conventional organic electrolyte two imidazolium‐based ionic liquids), which some cases enable to extend operating...
Abstract A spray gun machine was used to deposit high‐surface‐area supercapacitor electrodes using green non‐toxic aqueous dispersions based on different kinds of high specific surface area nanostructured carbon materials: activated graphene (a‐rGO) and (AC). Tuning the conditions dispersion formulation allowed us achieve good adhesion stainless‐steel current collectors in combination with a satisfactory mechanical stability electrodes. The approximately 2000 m 2 /g measured directly a‐rGO...
Abstract 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 carbonized polymer that self‐consistency contributes to densifying the monolith. Different degrees of anthracite activation different contents phases investigated. These all‐carbon have areas up 2600 m 2 g −1 , mechanical strengths 6 MPa, electrical conductivities 2–4 S cm densities between 0.4 0.7 −3 . In sulfuric acid...
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In this work, we investigate the potential of a novel carbon composite as an electrode for high-voltage electrochemical double-layer capacitors. The was prepared following sustainable synthetic approach that first involved pyrolysis and then activation precursor formed by winery wastes graphene oxide. in way shows very high specific surface area (2467 m2·g−1) optimum pore size distribution their use supercapacitor electrodes. Graphene-biowaste-derived composites are tested active materials...
The Cover Feature illustrates the ultrafast charge of a dual graphene lithium-ion capacitor. power density this device is boosted due to flat-shaped morphology active materials and phosphate functionalization negative electrode. More information can be found in Article by G. Moreno-Fernández, D. Carriazo co-workers.