Nano barium sulfate carbon composite material and preparation method and application therefor

A technology of nano-barium sulfate and carbon composite materials, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., and can solve the problem of unrecognized cycle performance, poor electrical conductivity, and difficult to solve nano-barium sulfate Agglomeration problems and other problems can be alleviated, the effects of sulfation of the negative electrode, cost-effective advantages, and excellent charge and discharge performance can be achieved.

Active Publication Date: 2016-05-11
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to solve the problem of agglomeration of nano-barium sulfate in the paste mixing process and poor electrical conductivity, and the patent does not give the cycle performance under high current, which may not be ideal

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  • Nano barium sulfate carbon composite material and preparation method and application therefor
  • Nano barium sulfate carbon composite material and preparation method and application therefor
  • Nano barium sulfate carbon composite material and preparation method and application therefor

Examples

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Embodiment 1

[0057] A nano-barium sulfate / carbon black composite material, which is composed of nano-barium sulfate and carbon black, and the nano-barium sulfate is dispersed on the surface of the carbon black, wherein the mass percentage of the nano-barium sulfate to the total mass of the composite material is 16.7%.

[0058] The preparation method of nano barium sulfate / carbon black composite material in the present embodiment is as follows:

[0059] Dissolve 5.9g of EDTA to 1L, the barium ion concentration is 0.1mol L -1 In the barium chloride solution, obtain solution A, adjust the pH value of solution A to 7.5; under the condition of 30 ℃, add 1L dropwise to solution A while stirring, the sulfate radical concentration is 0.1mol L -1 solution B; add 116.2g of carbon black to solution B, ultrasonically disperse for 10min, continue stirring for 0.5h, wash with water until neutral, and dry at 65°C for 2h to obtain nano barium sulfate / carbon Black composite.

[0060] The nano-barium sulf...

Embodiment 2

[0067] A nano-barium sulfate / graphite composite material is composed of nano-barium sulfate and graphite, and the nano-barium sulfate is dispersed on the surface of the graphite, wherein the mass percentage of the nano-barium sulfate to the total mass of the composite material is 28.6%.

[0068] The preparation method of nano barium sulfate / graphite composite material in the present embodiment is as follows:

[0069] Dissolve 29.2g of EDTA to 1L, the barium ion concentration is 0.2mol L -1 In the barium nitrate solution, obtain solution A, adjust the pH value of solution A to 8; under the condition of 40 ℃, add 0.2L dropwise to solution A while stirring, the sulfate radical concentration is 1mol L -1 sodium sulfate solution to obtain solution B; add 116.3g of graphite to solution B, ultrasonically disperse for 30min, continue stirring for 1h, wash with water until neutral, and dry at 70°C for 10h to obtain nano barium sulfate / graphite composite material .

[0070] The nano-b...

Embodiment 3

[0077] A nano-barium sulfate / graphene composite material is composed of nano-barium sulfate and graphene, and the nano-barium sulfate is dispersed on the surface of the graphene, wherein the mass percentage of the nano-barium sulfate to the total mass of the composite material is 33.3%.

[0078] The preparation method of nano barium sulfate / graphene composite material in the present embodiment is as follows:

[0079] Dissolve 146.1g of EDTA to 1L, the barium ion concentration is 0.5mol L -1 In the mixed solution of barium chloride and barium nitrate, solution A was obtained, and the pH value of solution A was adjusted to 7.9; at 45°C, 1 L was added dropwise to solution A while stirring, and the sulfate concentration was 0.5mol L -1 A mixed solution of potassium sulfate and sodium sulfate was obtained to obtain solution B; 233.3 g of graphene was added to solution B, ultrasonically dispersed for 40 minutes, stirred for 2 hours, washed with water until neutral, and dried at 75°C...

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Abstract

The invention belongs to the field of an electrochemical energy storage material, and relates to a nano barium sulfate/carbon composite material and a preparation method and an application therefor. According to the nano barium sulfate/carbon composite material, the nano barium sulfate is distributed on the surface of the carbon material, and is in full contact with the surface of a lead plaster active material for providing a large amount of crystal nucleus for lead sulfate crystalline grain deposition; meanwhile, carbon combined with active locations of barium sulfate can transfer electrons, so that the conductivity in the reaction points is reinforced; and in addition, the preparation method for the nano barium sulfate/carbon composite material is simple in method, short in period, free of pollution, and high in advantages used in industrial production. A negative electrode material prepared by taking the nano barium sulfate/carbon composite material provided by the invention as one of the raw materials is excellent in the charge-discharge performance; the negative electrode sulfation phenomenon can be reduced; and the capacity retention ratio of the negative electrode material is still kept more than 90% after the negative electrode material is subjected to 2,000 charge-discharge circles at current of 1C for charge and at current of 0.3C for discharge, so that the advantage of high cost performance is achieved.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage materials, and relates to a negative electrode material for a super battery. Background technique [0002] The development of the modern automobile industry has put forward higher requirements on the performance of the battery. The traditional lead-acid battery has the phenomenon of sulfation of the negative electrode under high current density, which affects its service life. In order to adapt to the use of lead-acid batteries in power batteries In the field of application, researchers added carbon materials used in supercapacitors to the negative electrode of lead-acid batteries to form a bipolar negative electrode with both battery performance and capacitor performance. However, the large-scale application of this bipolar electrode is limited due to the mismatch of the discharge potential between the carbon material and the negative electrode of the lead-acid battery. [0003] At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/62H01M4/36H01M4/58H01G11/30H01G11/32B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00H01G11/30H01G11/32H01M4/362H01M4/5825H01M4/583H01M4/622Y02E60/10
Inventor 谭强强王鹏飞徐宇兴
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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