Preparation method and energy storage application of graphene/nickel bicarbonate nanocube three-dimensional composite material

A nano-cube, nickel bicarbonate technology, applied in the directions of graphene, nickel carbonate, nano-carbon, etc., can solve the problems of affecting the cycle performance of electrode materials, uneven product structure and morphology, product performance and application impact, etc. Mass production, excellent electrochemical performance, low cost of raw materials
CN107640761BInactive Publication Date: 2019-11-29ZHENGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHENGZHOU UNIV
Publication Date
2019-11-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a preparation method of a graphene / nickel bicarbonate nanometer cubic three-dimensional composite material. The preparation method comprises the following steps: preparation ofgraphene oxide hydrosol: preparing graphene oxide with a Hummer' s method, and preparing the graphene oxide hydrosol from the prepared graphene oxide; adding urea into the prepared graphene oxide hydrosol, stirring uniformly, and slowly adding nickel acetate to obtain a precursor solution; transferring the precursor solution into a reaction kettle, placing the reaction kettle into a drying oven, and reacting at a constant temperature for a certain period of time to obtain graphene / nickel bicarbonate aerogel; performing vacuum freeze drying on the obtained graphene / nickel bicarbonate aerogel toobtain the graphene / nickel bicarbonate nanometer cubic three-dimensional composite material. The prepared graphene / nickel bicarbonate nanometer cubic three-dimensional composite material is applied to power lithium batteries and super batteries as an electrode material, and has excellent electric performance. The preparation method provided by the invention has the advantages of simple reaction process, easiness in operation, low cost, energy saving and environmental friendliness, and is suitable for industrial application.
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Description

technical field

[0001] The invention belongs to the field of nanocomposite material preparation, in particular to a method for preparing a graphene / nickel bicarbonate nanocube three-dimensional composite material and its application to a power lithium ion battery anode and a supercapacitor. Background technique

[0002] The growing popularity of everything from mobile electronic devices to electric vehicles has created an ever-increasing demand for high-performance lithium-ion batteries. A large number of studies have focused on the research of new electrode materials, such as some transition metals, oxides and carbonates with high theoretical capacity have become research hotspots. The research results show that nickel bicarbonate has a higher specific capacity than nickel carbonate and other carbonates (iron, cobalt, manganese) as a lithium battery anode. Chinese patent document CN 103880093 B discloses a nickel bicarbonate hollow sphere aggregate. The patent utilizes sol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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