Recent development of mixed transition metal oxide and graphene/mixed transition metal oxide based hybrid nanostructures for advanced supercapacitors

Bimetallic tungstate nanoparticle-decorated-lignin electrodes for flexible supercapacitors

“…These results overcome the limitations of poor cyclability and performance stability of earlier works. 41 The effects of different constituent mass ratios of the lignin/ NiCoWO 4 composite electrode on the electrochemical performance of the pseudocapacitor were studied. This is important to ascertain the contribution from individual constituents (in this case: lignin, NiCoWO 4 NPs, and PVDF) to the electrochemical performance which enables the effective design of the pseudocapacitor.…”

“…38 A recent review focused on the advancement of mixed transition metal oxides and their hybridization with graphene sheets makes active materials for electrodes. 39 Critical factors affecting the electrochemical performance, as well as the low electroconductivity and other limitations of these oxides were highlighted. Graphene sheets hybridized with mixed transition metal oxides resulted in a high specific surface area and good electroconductivity.…”

“…To improve this, MTMOs are customized into nanostructures. 41 Over the years there have been significant advancements in the synthesis of metal tungstates and tungsten oxides. CuWO 4 was synthesized using the chemical precipitation method and the parameters were optimized using a Taguchi robust design.…”

Carbon Transition‐metal Oxide Electrodes: Understanding the Role of Surface Engineering for High Energy Density Supercapacitors

“…Among the carbon materials, two-dimensional (2D) graphene oxide nanosheets/films function as versatile active support for transition metal oxides, including NiÀ , CoÀ , FeÀ , and Mn-based composites. [30,76] Reduced graphene oxide (rGO) not only owns excellent electrical conductivity, chemical stability, and high surface area but also offers an oxygen-rich surface, beneficial for the anchoring of metal oxides via electrostatic interactions. It can also suppress the volume change and particle agglomeration during the continuous charge-discharge electrochemical process.…”

A hybrid composite of rGO / TiO 2 as a double layer electrode with improved capacitance performance

“…4,5 One of the key parameters for hybrid materials is that they are designed in a way to incorporate advantageous traits of the parent materials. 6,7 For example, carbon-TMO hybrid composites (HCs) are said to demonstrate a high conductance and specific capacitance, long life cycle and a good capacitance retention which is far better than their parent materials. [8][9][10] Graphene makes an ideal SC support materials to prepare HCs as it has the highest theoretical conductivity and capacitance values as compared to the other carbonaceous materials.…”