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Graphene/CuFe2O4 composite nano-material for supercapacitor and preparation method of graphene/CuFe2O4 composite nano-material

A technology of composite nanomaterials and supercapacitors, which is applied in the manufacture of hybrid/electric double layer capacitors, electrodes of hybrid capacitors, etc., can solve the problems of few reports of composite nanomaterials, and achieve the effects of excellent electrochemical performance, uniform distribution and firm bonding.

Inactive Publication Date: 2018-01-16
南陵县生产力促进中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite nanomaterials formed by graphene and multiple oxides are rarely reported.

Method used

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  • Graphene/CuFe2O4 composite nano-material for supercapacitor and preparation method of graphene/CuFe2O4 composite nano-material
  • Graphene/CuFe2O4 composite nano-material for supercapacitor and preparation method of graphene/CuFe2O4 composite nano-material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Add Cu(CH 3 COO) 2 , Fe(CH 3 COO) 2 According to the molar ratio of 1:2, dissolve in deionized water to form a mixed solution of 1.5 mol / L;

[0021] 2) Mix the above mixed solution with reduced graphene oxide (rGO) suspension at a volume ratio of 1:3, where the concentration of rGO suspension is 1.5 mol / L to form a new mixed suspension;

[0022] 3) Add 2 mol / L LiOH solution to the above mixed solution, adjust the pH to 10.5, ultrasonically shake it to make it uniform, put it in the reaction kettle, and react at 100°C for 21 hours, and the obtained precipitate is deionized water Wash with ethanol repeatedly to obtain the preliminary product;

[0023] 4) The above-mentioned preliminary products were annealed alternately and in stages under normal pressure. The annealing process was: Ar gas, 600°C, 10min, N 2 gas, 800°C, 10min, Ar gas, 1000°C, 10min, N 2 Gas, 1200°C, 10min, after annealing, the final product graphene / CuFe 2 o 4 composite nanomaterials.

Embodiment 2

[0025] 1) Add Cu(CH 3 COO) 2 , Fe(CH 3 COO) 2 According to the molar ratio of 1:2, dissolve in deionized water to form a mixed solution of 1.5 mol / L;

[0026] 2) Mix the above mixed solution with the reduced graphene oxide (rGO) suspension at a volume ratio of 1:4, where the concentration of the rGO suspension is 1.5 mol / L to form a new mixed suspension;

[0027] 3) Add 2 mol / L LiOH solution to the above mixed suspension, adjust the pH to 10.5, ultrasonically shake to make it uniform, put it in the reaction kettle, and react at 100°C for 21h, and the obtained precipitate is deionized Water and ethanol are washed repeatedly to obtain the preliminary product;

[0028] 4) The above-mentioned preliminary products were annealed alternately and in stages under normal pressure. The annealing process was: Ar gas, 600°C, 10min, N 2 gas, 800°C, 10min, Ar gas, 1000°C, 10min, N 2 Gas, 1200°C, 10min, after annealing, the final product graphene / CuFe 2 o 4 composite nanomaterials.

Embodiment 3

[0030] 1) Add Cu(CH 3 COO) 2 , Fe(CH 3 COO) 2 According to the molar ratio of 1:2, dissolve in deionized water to form a mixed solution of 1.5 mol / L;

[0031] 2) Mix the above mixed solution with reduced graphene oxide (rGO) suspension at a volume ratio of 1:6, where the concentration of rGO suspension is 1.5 mol / L to form a new mixed suspension;

[0032] 3) Add 2 mol / L LiOH solution to the above mixed suspension, adjust the pH to 10.5, ultrasonically shake to make it uniform, put it in the reaction kettle, and react at 100°C for 21h, and the obtained precipitate is deionized Water and ethanol are washed repeatedly to obtain the preliminary product;

[0033] 4) The above-mentioned preliminary products were annealed alternately and in stages under normal pressure. The annealing process was: Ar gas, 600°C, 10min, N 2 gas, 800°C, 10min, Ar gas, 1000°C, 10min, N 2 Gas, 1200°C, 10min, after annealing, the final product graphene / CuFe 2 o 4 composite nanomaterials.

[0034] ...

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Abstract

The present invention discloses a graphene / CuFe2O4 composite nano-material for a supercapacitor and a preparation method of the graphene / CuFe2O4 composite nano-material. CuFe2O4 is of a nanosheet structure; the size of the CuFe2O4 is 100nm and is uniform; and the CuFe2O4 is uniformly distributed on flaky graphene. The preparation method of the graphene / CuFe2O4 composite nano-material comprises thefollowing steps that: 1) Cu(CH3COO)2 and Fe(CH3COO)2 are proportioned according to a molar ratio of 1: 2 and are dissolved in deionized water, so that a mixed solution of 1.5 mol / L can be formed; 2)the mixed solution is mixed with a reduced graphene oxide (rGO) suspension, so that a new mixed suspension can be formed; and 3) a LiOH solution is added to the above mixed suspension, the PH value ofan obtained solution is adjusted to be 10.5, and the solution is arranged in a reactor so as to be subjected to a reaction under 100 DEG C for 21h; and annealing is performed on an obtained product under atmospheric pressure. The graphene / CuFe2O4 composite nano-material prepared by using by the preparation method of the invention has excellent electrochemical performance and is an ideal supercapacitor electrode material.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode materials, especially the field of graphene composite electrode materials. Background technique [0002] A supercapacitor is a new type of energy storage element between ordinary electrostatic capacitors and secondary batteries. Because it has the advantages of high specific power, large specific capacity, low cost, long cycle life, no memory, high charge and discharge efficiency, no maintenance and maintenance, etc., it is widely used in mobile communications, information technology, electric vehicles, aerospace and defense technology etc. have broad application prospects. All countries in the world have attached great importance to it and carried it out as a key development project and strategic research. [0003] Graphene is a two-dimensional carbon nanomaterial with excellent physical properties. Graphene can be used in supercapacitors mainly because of the following characteristics:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/32H01G11/46H01G11/86
CPCY02E60/13
Inventor 刘海燕吕乐福
Owner 南陵县生产力促进中心