FIELD OF THE INVENTION
This invention relates to Sustainable synthetic approach and super capacitive behaviour of NiO/r-GO.
BACKGROUND OF THE INVENTION
US10102973b2 says that a ceramic capacitor comprising at least a dielectric ceramic layer and at least a graphene electrode layer deposited on the ceramic layer, wherein the graphene electrode layer has a thickness no less than 2 nm and consists of a graphene material or a graphene composite material containing at least 0.1% by weight of a graphene material dispersed in a matrix material or bonded by a binder material, wherein the graphene material is selected from (a) a plurality of single-layer or multi-layer pristine graphene sheets having less than 0.01% by weight of non-carbon elements, or (b) one or a plurality of a non-pristine graphene material having at least 0.01% by weight of non-carbon elements, wherein the non-pristine graphene is selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, doped graphene, chemically functionalized graphene, or a combination thereof.
Research Gap: Only graphene and its main derivatives have been used in this work.
CN109336196A says that the present invention relates to technical field of composite materials, to solve the problems, such as that conventional electrode materials volume capacity is low, provide three-dimensional fine and close macroscopic body of metal sulfide porous framework/graphene and preparation method thereof, application. The three-dimensional fine and close macroscopic body of the metal sulfide porous framework/graphene is made with MOF crystal powder by compound, vulcanizing treatment by graphene oxide. The three-dimensional fine and close macroscopic body of metal sulfide porous framework of the invention/graphene remains the structural intergrity of graphene and the metal sulfide porous framework obtained using MOF crystal as template, the excellent properties of graphene and metal sulfide porous framework are had both, with excellent mechanical performance, high density, high volume capacity and high volume energy density, it can be used as application of the new electrode materials in the energy, environment or flexible device field, while also having broad application prospects in fields such as sensing, catalysis, energy storage, absorption.
Research Gap: In our study, the cost-effective and environmentally safe method is used to develop a good electrode material.
CN105551818B says that the invention belongs to nano-functional material technical field, specially a kind of beta cobaltous hydroxide nickel and nickel-plating carbon nanotube composite material and its preparation method and application.The present invention selects growth templates of the nickel-plating carbon nanotube nickel-plating carbon nanotube as beta cobaltous hydroxide nickel, pass through three step solvent thermal reactions and hydro-thermal process, by in the lamella club-shaped material of ZnO thin film to ß nickel hydroxides and nickel-plating carbon nanotube, the composite material with three-dimensional multistage structure is obtained.The flower-like nanometer thin slice vertical-growth of beta cobaltous hydroxide nickel is on nickel-plating carbon nanotube surface.This beta cobaltous hydroxide nickel and electrode material of the nickel-plating carbon nanotube composite material as ultracapacitor, show excellent specific capacity, 1 A g 1Current density under, material specific capacity is up to 1982 F g 1, the capacity retention ratios of 1000 circle of cycle are 86.8% under the electric current.In addition, the manufacturing cost of the nano material is low, efficient, it is easier to which industry amplification can be widely applied to the new electrode materials of ultracapacitor as one kind, have broad application prospects to solve actual application problem.
Research Gap: In our study, the synthesized NiO nanoparticles have been incorporated to reduced graphene oxide.
SUMMARY OF THE INVENTION
Due to advanced properties such as excellent cyclic stability, eco-friendliness, and high power, supercapacitors have received a lot of attentions. Supercapacitors are placed in between batteries and fuel cells. Supercapacitors offer a lot of potential for use in the areas of hybrid power cars, electronic gadgets, renewable energy systems, etc. Inorganic metal oxides (transition metal oxides) and their composite materials are comparatively stable and have excellent specific capacitance. Different physical and chemical methods have been used in the synthesis of metal-based nanoparticles. The extract obtained from plant derived materials contain different biologically active components. These components help in the stabilisation, capping and reduction of nanoparticles during synthesis. This approach is very safe to environment and efficient. The composite materials of metal-based nanoparticles show more specific capacitance and stability than individual ones.
DETAILED DESCRITION OF THE INVENTION
The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to clearly communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a",” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises,” “comprising,” “includes” and/or “including,” when used herein, specify the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.
It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
In addition, the descriptions of "first", "second", “third”, and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
These and other advantages of the present subject matter would be described in greater detail with reference to the following figures. It should be noted that the description merely illustrates the principles of the present subject matter. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described herein, embody the principles of the present subject matter and are included within its scope.
Due to advanced properties such as excellent cyclic stability, eco-friendliness, and high power, supercapacitors have received a lot of attentions. Supercapacitors are placed in between batteries and fuel cells. Supercapacitors offer a lot of potential for use in the areas of hybrid power cars, electronic gadgets, renewable energy systems, etc. Inorganic metal oxides (transition metal oxides) and their composite materials are comparatively stable and have excellent specific capacitance. Different physical and chemical methods have been used in the synthesis of metal-based nanoparticles. The extract obtained from plant derived materials contain different biologically active components. These components help in the stabilisation, capping and reduction of nanoparticles during synthesis. This approach is very safe to environment and efficient. The composite materials of metal-based nanoparticles show more specific capacitance and stability than individual ones.
The overall synthetic process (from the collection of Carica papaya leaves to the synthesis of NiO/r-GO) and applications of NiO/r-GO composite as an electrode material is illustrated below:

ADVANTAGES OF THE INVENTION
Sustainable synthetic approach
Efficient and low-cost synthetic method
Good electrode material for supercapacitors
Sustainability
Cost-effectiveness
Supercapacitor’s electrode material.

Claims:

1. A method of Sustainable synthetic approach and super capacitive behaviour of NiO/r-GO comprising the steps of placing Supercapacitors are in between batteries and fuel cells; and Supercapacitors offer a lot of potential for use in the areas of hybrid power cars, electronic gadgets, renewable energy systems.
2. The method as claimed in claim 1, wherein inorganic metal oxides (transition metal oxides) and their composite materials are comparatively stable and have excellent specific capacitance.
3. The method as claimed in claim 1, wherein different physical and chemical methods have been used in the synthesis of metal-based nanoparticles.
4. The method as claimed in claim 1, wherein the extract obtained from plant derived materials contain different biologically active components; and these components help in the stabilisation, capping and reduction of nanoparticles during synthesis.