Excimer laser assisted very fast exfoliation and reduction of graphite oxide at room temperature under air ambient for Supercapacitors electrode

Recent trends in graphene supercapacitors: from large area to microsupercapacitors

“…123,124 Then, a pulsed laser with the wavelength in the UV region has been used in several studies in order to produce LrGO. [125][126][127][128][129] The principal motivation to use this type of laser is that the level of reduction is very high at short times, since pulses in the order of nanoseconds/femtoseconds can produce incident powers in the order of MW. Different laser systems with intermediate wavelengths between the IR and the UV region have also been employed to produce 3D porous graphene.…”

A Unique 3D Structured NiMoO4/MoO3 Heterojunction for Enhanced Supercapacitor Performance

“…Increasing the population of the world leads to the consumption of more energy for more welfare, and therefore, it needs more devices to store the electrical energy. − There are various equipment for storing energy with different strategies such as batteries, ideal capacitors, fuel cells, and electrochemical capacitors. , Batteries have suitable energy with a long lifetime but suffer from low power that is opposite of that of ideal capacitors that have high power with low energy. , Electrochemical capacitors that are also called supercapacitors (SCs) or ultra-capacitors are some charge storage equipment with more power than batteries and more energy than ideal capacitors that can fill the gap between these devices. , The strategy of energy storage for SCs is related to active materials that are used in their structure. − In the field of materials, SCs are classified in three groups: materials which are based on carbon, metal oxides, and conductive polymers. Carbon materials such as graphene, active carbon, carbon nanotubes, etc., store the electrical energy through a double layer mechanism also called a electrochemical double layer capacitor. , Metal oxides are another active material that stores the electrical energy through a charge transfer reaction called pseudo-capacitors . These materials have more benefits than others such as a variety of oxidation states, chemical stability, and ease of synthesis. , First, hydrated RuO 2 was presented as a transition metal oxide for SCs with the specific capacitance of about 700 F/g .…”

“…Carbon materials such as graphene, active carbon, carbon nanotubes, etc., store the electrical energy through a double layer mechanism also called a electrochemical double layer capacitor. 13,14 Metal oxides are another active material that stores the electrical energy through a charge transfer reaction called pseudo-capacitors. 15 These materials have more benefits than others such as a variety of oxidation states, chemical stability, and ease of synthesis.…”

Laser Reduction of Graphene Oxide/Zinc Oxide Nanoparticle Nanocomposites as a One‐Step Process for Supercapacitor Fabrication

“…RGO can be obtained by thermal, chemical, electrochemical, or photochemical/photothermal reduction processes. The laser irradiation process for direct reduction of GO in laser‐reduced GO (LRGO) has recently been explored for the application of supercapacitors . The laser reduction of GO involves a combination of photochemical and photothermal processes that lead to the elimination of oxygenated groups (hydroxyl and epoxide), followed by subsequent molecular reorganization and restoration of the sp 2 carbon network.…”