Reduced graphene oxide for Li–air batteries: The effect of oxidation time and reduction conditions for graphene oxide

Graphene material preparation through thermal treatment of graphite oxide electrochemically synthesized in aqueous sulfuric acid

“…9,10,17 However GO prepared by electrochemical overoxidation of graphite can be also used. 11,18 GO can be thermally reduced by shock treatment at the temperatures higher than 1000 C in air or argon atmosphere [19][20][21][22] or by gradual heating under the inert gas ow (nitrogen or argon). 9,23 To remove all oxygen functionalities from the graphitic structure, thermal treatment of GO should be carried out in the presence of hydrogen.…”

“…24 The oxidation stage as well as the stage of graphene layer separation are inuenced by the employed conditions (atmosphere, temperature, treatment time). [14][15][16][17][18][19][20][21][22]24 In this work, we present a simple, low-cost and scalable method enabling production the large amounts of graphene material through the thermal exfoliation-reduction of GO. Contrary to the most of research works, where as a precursor the GO synthesized by chemical methods is used, in our work the GO precursor characterized by the high content of oxygen functionalities was synthesized by electrochemical Contrary to the chemical methods, GO gathered by electrochemical methods is not contaminated by oxidant and byproducts of the conducted oxidation.…”

Modulating the electronic and magnetic properties of graphene

“…256 Reduced graphene oxide is an effective alternative to ITO transparent electrodes for applications in light emitting diodes (LEDs) and solar cell devices. 257,258 Oxygen-doped graphene systems show good hydrogen storage capacity 259 and have been proven to be a good performance electrode material for Li-ion, 260 Li-S 261 and air 262 batteries. Furthermore, the myriad applications of oxygen-doped graphene systems extend to supercapacitors with enhanced capacities, 263 major components of drug delivery systems 264 and sensors with better sensing capabilities.…”

Highly ordered and ultra-long carbon nanotube arrays as air cathodes for high-energy-efficiency Li-oxygen batteries

“…To date, various carbon electrodes such as porous carbon [13,14], carbon fibres [15,16], graphene [11,17,18] and carbon nanotube (CNT) composites [9,19,20] have been selected as the cathodes, owing to their highly electronic conductivity, tunable porosity, light weight and low cost. Among them, nanostructured CNTs have been regarded as one of the most efficient oxygen cathodes for reversible LieO 2 batteries, as they could be modified easily by surface chemistry to enhance catalytic activities and prolong cycle durabilities [9,19e21] and could readily visualize the morphological and compositional changes of reactions products during cycling operation [22e24].…”