A5077330274- Supercapacitor Materials and Fabrication
- Conducting polymers and applications
- Advanced battery technologies research
- Advancements in Battery Materials
- Fuel Cells and Related Materials
- Advanced Battery Materials and Technologies
- Electrocatalysts for Energy Conversion
- Advanced Battery Technologies Research
- Electrochemical sensors and biosensors
- Advanced Sensor and Energy Harvesting Materials
- Membrane-based Ion Separation Techniques
- Electrochemical Analysis and Applications
- Ionic liquids properties and applications
- Electric and Hybrid Vehicle Technologies
- Analytical Chemistry and Sensors
- Anodic Oxide Films and Nanostructures
- Interconnection Networks and Systems
- Transition Metal Oxide Nanomaterials
- Molecular Junctions and Nanostructures
- Renewable energy and sustainable power systems
- Petroleum Processing and Analysis
- Advanced DC-DC Converters
- Advancements in Solid Oxide Fuel Cells
- Graphite, nuclear technology, radiation studies
- Power Transformer Diagnostics and Insulation
Poznań University of Technology
2016-2025
Kansai University
2020-2024
Łukasiewicz Research Network - Institute of Non-Ferrous Metals
2024
Łukasiewicz Research Network
2024
This paper is focused on neutral aqueous medium, i.e.lithium, sodium and potassium sulfate solutions in a wide range of concentrations (0.1–2.5 mol L−1) as promising electrolytes for electrochemical capacitors because they are cheap, non-corrosive allow applying diverse current collectors. These properties make the capacitor assembling process much easier cheaper. Additionally, such electrochemically stable environmentally friendly. Electrochemical investigations carried out especially 1...
This paper presents various applications of carbon nanotubes as components electrode materials for such electrochemical use capacitors, fuel cells, hydrogen electrosorption and accumulators. Generally, give exceptional improvement performance due to their mesoporous well conducting networks. The cell resistance is drastically reduced the transport ions greatly enhanced. In addition good conductivity, can be flexible stretchable which crucial cyclability electrodes, especially if volumetric...
Highly tunable properties of materials used for the construction electrochemical capacitors make them a perfect choice broad scope applications with high power demand. The ability to design system according expected power/energy profile allows being considered as powerful alternatives conventional and batteries. Carbon developed specific surface area are most common electrode components because their cost, versatile form, availability, easiness processing, eco-friendly character. Biomass is...
High-voltage aqueous electrolyte based supercapacitors (U > 1.23 V) attract significant attention for next-generation high power, low cost and environmentally friendly energy storage applications. Cell ageing is however markedly pronounced at elevated voltages results in accelerated overall performance fade increased safety concerns. Online electrochemical mass spectrometry, combined with cell pressure analysis, the first time shown to provide a powerful means situ investigation of...
This paper reports the electrochemical behaviour of supercapacitor carbon electrodes operating in different aqueous solutions modified by various redox-active species (hydroxybenzenes, bromine derivatives and iodide). Three dihydroxybenzenes with varying stereochemistry, <italic>i.e.</italic>, –OH substitution, have been considered as electrolyte additives (0.38 mol L<sup>−1</sup>) acidic, alkaline neutral solutions. High capacitance values obtained, especially for acidic containing...
Positive Poles: A new type of electrochemical capacitor with two different aqueous solutions, separated by a Nafion membrane (see image) is described. High capacitance values as well excellent energy/power characteristics are reported and discussed. The neutral character the applied electrolytes makes this an environmentally friendly, easy to assemble, cost-effective device for energy storage.
Electrochemical capacitors – also called supercapacitors represent a relatively new electricity storage system applied for harvesting energy and delivering high power pulses short periods. The main developed technology is based on charging an electrical double-layer (EDL) at the electrode–electrolyte interface of surface area carbons. disadvantages latter are low density safety issues related to use organic electrolytes. This paper describes alternative solutions where pseudocapacitive...
Abstract Lithium–sulfur batteries are attractive for automobile and grid applications due to their high theoretical energy density the abundance of sulfur. Despite significant progress in cathode development, lithium metal degradation polysulfide shuttle remain two critical challenges practical application Li–S batteries. Development advanced electrolytes has become a promising strategy simultaneously suppress dendrite formation prevent dissolution. Here, new class concentrated...
Porous binder-free carbon electrodes were obtained by using cellulose filter paper through soft-salt template synthesis. The electrode thickness could be tuned, and a linear relationship with the specific capacitance in supercapacitors was established.
This paper reports on several mechanisms of carbon aging in a hybrid lithium-ion capacitor operating with 1 mol L-1 LiPF6 an ethylene carbonate/dimethyl carbonate 1:1 vol/vol electrolyte. Carbon electrodes were subjected to constant polarization protocol (i.e., floating) at various voltages and analyzed postmortem via complementary techniques. The selected was able simulate the behavior real system. Due use metallic lithium as counter electrode, influence battery-like assumed be limited. Our...
The electrochemical irreversibility of lithium extraction from rhenium oxide (Li<sub>5</sub>ReO<sub>6</sub>) has been studied in LiPF<sub>6</sub> electrolyte, and the material further included activated carbon electrode a lithium-ion capacitor for lithiation graphite.
The paper reports on electrochemical characterization of several supercapacitors operating in aqueous electrolytes and discusses a strategy for enhancing their performance. Various such as alkaline (6 mol L−1 KOH), acidic (1 H2SO4) neutral KI 1 Na2S2O3) were investigated terms stability redox activity. A new concept capacitor with two electrodes different is demonstrated. positive electrode worked solution whereas KOH served an electrolytic medium the negative electrode. As result, improved...
This paper reports on the performance of supercapacitor operating in aqueous acetic acid salts. Lithium, sodium and magnesium acetate solutions at various concentrations have been selected as electrolytes. Maximum operational voltage overall capacitor determined by several electrochemical techniques. Floating galvanostatic charge/discharge tests proved promising high voltages (1.5 V); capacitance values retained more than 80% initial value for all tested Additionally, due to ability operate...
This paper reports on the electrochemical performance of symmetric carbon/carbon capacitors operating in aqueous electrolyte (0.5 mol L−1 K2SO4 solution) and modified with various amounts agar (up to 5 wt%). It has been found that a change form (from liquid gel-like) increases hydrogen storage efficiency negative electrode (confirmed by operando Raman spectroscopy), improves cycle life at elevated voltages reduces self-discharge. Furthermore, it gas generation rate during capacitor operation...
This paper presents a unique strategy aiming at extending the operational voltage range in supercapacitor working neutral aqueous electrolyte. In-depth analysis of equilibria formed carbon/electrolyte interface gives possibility to reach 1.8 V with excellent reversibility during cycling. To goal, donor - acceptor nature carbon electrode surface has been taken into consideration. Controlled oxidation materials coupled ammonia adsorption have realized order adjust optimal equilibrium...
This paper presents supercapacitors utilizing new redox-active electrolytes with bromine species. Two sources of Br specimen were investigated, i.e. dibromodihydroxybenzene dissolved in KOH and potassium bromide hydroxybenzene additive. KOH-activated carbon, exhibiting a well-developed porosity, was incorporated as an electrode material. The tested systems revealed capacitance enhancement explained by Br− partial BrO3− redox activity. optimisation the electrolyte concentration resulted value...
This paper provides a comprehensive overview of the recent state art in research on neutral, water-based electrolyte, i.e., 1 mol⋅L−1 Li2SO4 solution, for sustainable electrochemical capacitors. The fundamental physicochemical properties aqueous electrolytic solutions (conductivity, viscosity, etc.) are discussed together with performance carbon-based In addition to critical review findings field, discusses new data obtained operando approach; discussion is supported by from quartz crystal...