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Preparation method of high-conductivity metal net load graphene current collector

A high-conductivity, metal mesh technology, used in electrode carriers/current collectors, circuits, electrical components, etc., can solve problems such as large current collector resistance, and achieve the effect of improving anti-oxidation performance and high conductivity

Inactive Publication Date: 2018-11-27
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Based on the deficiencies of the prior art, the present invention provides a battery current collector and a manufacturing method thereof to partially or completely improve or even solve the above existing fuel cells (such as magnesium batteries) and secondary batteries (such as lithium-ion batteries, The problem of excessive current collector resistance in emerging sodium, potassium, aluminum-ion batteries and lithium-sulfur batteries, etc.)

Method used

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  • Preparation method of high-conductivity metal net load graphene current collector
  • Preparation method of high-conductivity metal net load graphene current collector
  • Preparation method of high-conductivity metal net load graphene current collector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1) Raw material pretreatment: the commercial metal used is copper; the graphene used is graphene, and the oxide layer on the surface of the metal mesh is cleaned with dilute acid, which is dilute hydrochloric acid.

[0054] 2) Ultrasonic dispersion treatment of graphene: ultrasonically disperse a certain amount of graphene in deionized water for 20 minutes.

[0055] 3) Reaction temperature: hydrothermal reaction temperature 120°C, reaction time 24h.

[0056] 4) Cleaning and drying conditions: Rinse with deionized water until there are no tiny graphene particles adsorbed on the surface. Dry at 60°C for 6h under vacuum.

[0057] After testing with a multimeter, the resistance of the copper current collector was 0.2Ω before recombination, but after recombination, its resistance was significantly lower than 0.1Ω, exceeding the lower limit of the measurement range of the multimeter. The electrochemical impedance spectroscopy (Electrochemical Impedance Spectroscopy, EIS) of...

Embodiment 2

[0059] 1) Raw material pretreatment: the commercial metal used is copper; the graphene material used is graphene oxide; the oxide layer on the surface of the metal mesh is cleaned with dilute acid, which is an acetic acid solution.

[0060] 2) Ultrasonic dispersion treatment of graphene: ultrasonically disperse a certain amount of graphene in deionized water for 60 minutes.

[0061] 3) Reaction temperature: the hydrothermal reaction temperature is 200° C., and the reaction time is 12 hours.

[0062] 4) Cleaning and drying conditions: Rinse with deionized water until there are no tiny graphene particles adsorbed on the surface. Dry in air for 24h. Its electrochemical impedance spectroscopy as image 3 As shown, it can be seen that this example B ratio of copper mesh loaded graphene figure 2 The slope of graphene-supported copper grid example A is slightly increased, indicating that this scheme has lower resistance characteristics in electrochemical systems.

Embodiment 3

[0064] 1) Raw material pretreatment: the commercial metal used is still metal nickel; the graphene material used is reduced graphene oxide; the oxide layer on the surface of the metal mesh is cleaned with dilute acid, which is dilute hydrochloric acid.

[0065] 2) Ultrasonic dispersion treatment of graphene: ultrasonically disperse a certain amount of graphene in deionized water for 30 minutes.

[0066] 3) Reaction temperature: the hydrothermal reaction temperature is 140° C., and the reaction time is 18 hours.

[0067] 4) Cleaning and drying conditions: Rinse with deionized water until there are no tiny graphene particles adsorbed on the surface. Dry in air for 24h. Electrochemical impedance spectroscopy of nickel mesh loaded with graphene such as image 3 As shown, it can be seen that the slope of nickel mesh loaded with graphene is roughly the same as that of copper mesh loaded with graphene, which indicates that graphene is evenly loaded on the surface of the two metals ...

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Abstract

The invention discloses a preparation method of a high-conductivity metal net load graphene current collector, and belongs to the field of batteries. A battery current collector comprises a metal netand a graphene material, wherein graphene is stably loaded on the metal net. The battery current collector has the performance of improving the conductivity due to the import of the graphene. The battery current collector provided by the invention has highly enhanced conductivity and is capable of enhancing the performance to a certain extent.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a method for preparing a high-conductivity metal mesh-loaded graphene current collector. Background technique [0002] Our country has a vast territory, and there are still some areas where electricity is not popularized. Coupled with occasional natural disasters, it has led to the dilemma of difficulty in using electricity. The emergence of fuel cells (primary batteries) has greatly solved the problem of lack of power in the field. The supply of emergency power in harsh natural environments is extremely important for field exploration workers and countries and regions that cannot be covered by power grids. [0003] Lithium-ion batteries (secondary batteries) have received extensive attention at home and abroad due to their widespread use in smartphones and new energy devices. As most of the domestic achievements in emerging magnesium fuel cells, lithium-sulfur batteries, and sodium-ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/74H01M4/86
CPCH01M4/661H01M4/663H01M4/665H01M4/74H01M4/86Y02E60/10Y02E60/50
Inventor 张以河白李琦张元星孙黎
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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