A promising method: Molten salt oxidation of nickel in KOH melts for the direct production of electroactive nickel oxides to be used in supercapacitor applications
Since the invention of capacitor in 1745, very high capacity capacitors that fill the gap between batteries and conventional capacitors could only found widespread use in the beginning of this century. Today these capacitors also named as super capacitors, ultra capacitors or electrochemical capacitors are extensively used in automotive industry, electrical vehicles and also for power quality. Among the two basic type of supercapacitors, electrical double layer capacitors (EDLC) are more widely used. However, for increasing both power and energy density, pseudo capacitors or a combination of EDLC and pseudo capacitors provides more opportunities.
Electroactive nickel oxides have attracted substantial interest as pseudo capacitor electrodes due their high capacity. In this presentation after giving and overview on supercapacitors, production and characterization methods of electroactive nickel oxides will be summarized. Benefits of direct production of these oxides on nickel substrates will be explained and the methods for direct production will be compared. Our recent results on the usage of molten salt oxidation of nickel foams for super capacitor applications will be presented.
FeCrNi-aC:H based amorphous nanotubular coatings –
a specific case of carbon-based nanocomposite
Nanocomposites based on carbon are an important group of materials applied mainly in thin film form in mechanical microsystems, on cutting tools, machine parts and bio-implants.
They show interesting properties like chemical inertness, high hardness and resistance to cracking, low friction and biocompatibility. Their properties can be tuned by changing metal content.
The lecture contains short introduction to structure and deposition methods of carbon-based nanocomposite thin films containing metal carbides and metals with low affinity to carbon. The design concept of nanocomposite films is also discussed.
Presentation of recent research results concerns nanocomposite films showing unique, self-organized nanotubular structure formed during deposition by sputtering of multicomponent metallic alloy in hydrocarbon containing atmosphere.
The Advanced Materials Challenges for Health and Alternative Energy Solutions (AMAES VI) workshop and summer school will take place at the University of Cologne (Germany) from 5.-8. July 2017.
This international workshop and summer school brings together experts in the field of materials science and biomedicine to discuss recent advances and future developments in the priority areas energy and health. This event is part of the successfull AMAES workshop series taking place in Germany, India and Korea extending it with a dedicated summer school for master and PhD students, as well as postdoctoral researchers to interact with national and international experts. This interdisciplinary approach of joining material science, biology, medicine, chemistry, physics and engineering will allow to target new solutions for pressing societal needs in energy and health.
The new AMAES.net website is online. Further information will be available soon. Stay tuned…