Co3O4/graphene electrode material preparation method through hydro-thermal coupling spray pyrolysis

A graphene electrode and spray pyrolysis technology, applied in the field of nanomaterials, can solve the problems such as the cycle performance of composite materials not meeting the requirements, the structure is unstable, and achieve good dispersibility and fluidity, simplified production process, and improved structural stability. sexual effect

Inactive Publication Date: 2014-08-06
SHANDONG RUNSHENG POWER TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Related patents also show that Co 3 o 4 Combination with graphene can improve electrochemical performance, but due to Co 3 o 4 The structure is unstable, and the cycle performance of the composite material is still not up to the requirement, so it is necessary to further improve its structural stability, thereby improving its electrochemical performance

Method used

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  • Co3O4/graphene electrode material preparation method through hydro-thermal coupling spray pyrolysis
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  • Co3O4/graphene electrode material preparation method through hydro-thermal coupling spray pyrolysis

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Effect test

Embodiment 1

[0029] Preparation of Co by hydrothermal spray pyrolysis 3 o 4 / graphene nanocomposite electrode material, complete according to the following steps.

[0030] (1) Add 0.10 g of graphite oxide into 1.00 L of ethanol, adjust the pH of the solution to 5, and prepare a graphene oxide solution.

[0031] (2) Dissolve 3.40g of cobalt nitrate hexahydrate and 5.00mg of ferric nitrate nonahydrate in de-ethanol, and stir the solution until it becomes clear, in which the concentration of cobalt nitrate is 0.05mol / L; add 0.34mg of polyvinylpyrrolidone to the above solution, Stir at room temperature to completely dissolve and mix well.

[0032] (3) Dissolve 0.04g of sodium hydroxide in deionized water, stir the solution until it is clear, and its concentration is 0.10mol / L, slowly add it dropwise to the above solution, and mix evenly by ultrasonic; then slowly add graphene oxide dropwise Solution, wherein the dropwise amount of graphene oxide should ensure that Co 3 o 4 The content of ...

Embodiment 2

[0039] Preparation of Co by hydrothermal / spray pyrolysis 3 o 4 / graphene nanocomposite electrode material, complete according to the following steps.

[0040] (1) Take 1.00 g of graphite oxide and add it into 5.00 L of deionized water to adjust the pH of the solution to 6 to prepare a graphene oxide solution.

[0041] (2) Dissolve 10.00g of cobalt acetate and 0.033g of nickel nitrate hexahydrate in deionized water, stir the solution until it becomes clear, and the concentration of cobalt acetate is 0.06mol / L; add 1.98mg of polyvinyl alcohol to the above solution, and Stir to dissolve completely and combine evenly.

[0042] (3) Dissolve 0.17g of potassium hydroxide in deionized water, stir the solution until it becomes clear, and its concentration is 0.12mol / L, slowly add it dropwise to the above solution, and mix evenly by ultrasonic; then slowly add graphene oxide dropwise Solution, wherein the dropwise amount of graphene oxide should ensure that Co 3 o 4 The content of ...

Embodiment 3

[0049] Preparation of Co by hydrothermal / spray pyrolysis 3 o 4 / graphene nanocomposite electrode material, complete according to the following steps.

[0050] (1) Take 2.00 g of graphite oxide and add it to 5.00 L of ethylene glycol to adjust the pH of the solution to 7 to prepare a graphene oxide solution.

[0051] (2) Dissolve 16.70g of cobalt chloride hexahydrate and 0.10g of zinc nitrate hexahydrate in deethylene glycol, and stir the solution until it becomes clear, in which the concentration of cobalt nitrate is 0.05mol / L; 6.69mg of dodecylbenzene Sodium sulfonate was added to the above solution and stirred at room temperature to completely dissolve and mix evenly.

[0052] (3) Dissolve 0.14g of sodium carbonate in deionized water, stir the solution until it becomes clear, and its concentration is 0.14mol / L, slowly add it dropwise to the above solution, and mix evenly by ultrasonic; then slowly add graphene oxide solution dropwise , where the amount of graphene oxide a...

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Abstract

The invention discloses a Co3O4/graphene electrode material preparation method through hydro-thermal coupling spray pyrolysis. The preparation method comprises the following steps: adding a divalent cobalt salt solution, an aqueous alkali and a mixed solution consisting of metal ions or metallic oxide and a surfactant into a graphene oxide solution, enabling the mixture to be uniform with ultrasound, placing the mixture in a hydrothermal kettle for reaction, cooling to the room temperature, separating and washing products, adding a dispersing agent and the surfactant to prepare a sizing agent with certain solid content, and adopting spray pyrolysis to perform rapid drying process to obtain the Co3O4/graphene nano-composite electrode material. According to the invention, on the basis of the high conductivity advantage of graphene, the structural stability of Co3O4 is improved by mixing the metal ions or the metallic oxide; dynamic rapid drying is realized through spray pyrolysis to avoid growing and agglomeration of nano-composite material particles, so that the obtained product has excellent dispersibility and fluidity, and the subsequent pole piece preparation technology is facilitated; the hydro-thermal coupling spray pyrolysis technology is simple, easy to operate and control, and suitable for continuous mass production.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, relates to a preparation method of a nanocomposite material, in particular to a Co 3 o 4 / Graphene nanocomposite electrode material and preparation method thereof, the nanocomposite electrode material has potential application value in aspects such as energy storage device electrode material, conductive filling material and catalytic reaction. Background technique [0002] With the progress of human society, the demand for energy is increasing rapidly. Global warming and energy crisis have become severe challenges that human beings must face. The development of new energy storage devices has become a new effective way for human beings to solve energy problems in the 21st century. At present, energy storage devices mainly include batteries and capacitors. Batteries have high energy density, but their power density cannot reach the level of supercapacitors. Capacitors have high power densi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52H01M4/62H01G11/46B82Y30/00
CPCB82Y30/00H01G11/30H01G11/32H01M4/364H01M10/0525Y02E60/10
Inventor 蒲薇华陈敏李青海王珊珊叶霞唐廎
Owner SHANDONG RUNSHENG POWER TECH
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