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Chemical nickel plating solution and preparation method thereof, method for carrying out nickel plating on nano-LiFePO4/C composite material by using chemical nickel plating solution, and resulting product thereof

A technology of electroless nickel plating solution and composite materials, applied in the direction of coating, etc., can solve the problems of small tap density, etc., and achieve the effect of high tap density, low internal resistance and excellent discharge performance

Inactive Publication Date: 2012-10-24
GUANGXI NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have improved the electrical conductivity of the material to a certain extent, increased the ion diffusion coefficient, and achieved some effects, but the low-temperature electrical conductivity and cycle performance of the prepared material, as well as the smaller tap density, still need further research. comprehensive improvement

Method used

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  • Chemical nickel plating solution and preparation method thereof, method for carrying out nickel plating on nano-LiFePO4/C composite material by using chemical nickel plating solution, and resulting product thereof
  • Chemical nickel plating solution and preparation method thereof, method for carrying out nickel plating on nano-LiFePO4/C composite material by using chemical nickel plating solution, and resulting product thereof
  • Chemical nickel plating solution and preparation method thereof, method for carrying out nickel plating on nano-LiFePO4/C composite material by using chemical nickel plating solution, and resulting product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Composition of electroless nickel plating solution

[0033] Nickel sulfate 33g / L;

[0034] Sodium hypophosphite 28g / L;

[0035] Sodium acetate 10g / L;

[0036] Citric acid 20g / L;

[0037] Alanine 10g / L;

[0038] Ammonia to adjust the pH to 4.6.

[0039] Second, the preparation of electroless nickel plating solution

[0040] 1) Prepare citric acid solution and sodium acetate solution respectively, and mix the two solutions to obtain mixed solution A;

[0041] 2) preparing a nickel sulfate solution, adding the mixed solution A to the nickel sulfate solution to obtain a mixed solution B;

[0042] 3) Prepare sodium hypophosphite solution and alanine solution respectively, and mix the two solutions to obtain mixed solution C;

[0043] 4) Add mixed solution C to mixed solution B, add distilled water to make up to 1 L to obtain mixed solution D, adjust the pH of mixed solution D to 4.6 with ammonia water, and obtain an electroless nickel plating solution.

[0044] 3....

Embodiment 2

[0060] 1. The composition of electroless nickel plating solution:

[0061] Nickel sulfate 30g / L;

[0062] Sodium hypophosphite 26g / L;

[0063] Sodium acetate 15g / L;

[0064] Citric acid 25g / L;

[0065] Cysteine ​​20g / L;

[0066] Ammonia to adjust the pH to 5.2.

[0067] Second, the preparation of electroless nickel plating solution:

[0068] 1) Prepare citric acid solution and sodium acetate solution respectively, and mix the two solutions to obtain mixed solution A;

[0069] 2) preparing a nickel sulfate solution, adding the mixed solution A to the nickel sulfate solution to obtain a mixed solution B;

[0070] 3) Prepare sodium hypophosphite solution and cysteine ​​solution respectively, and mix the two solutions to obtain mixed solution C;

[0071] 4) Add the mixed solution C to the mixed solution B, add distilled water to make the volume up to 1 L to obtain the mixed solution D, adjust the pH of the mixed solution D to 5.2 with ammonia water, and obtain the electrole...

Embodiment 3

[0083] 1. The composition of electroless nickel plating solution:

[0084] Nickel sulfate 25g / L;

[0085] Sodium hypophosphite 23g / L;

[0086] Sodium acetate 30g / L;

[0087] Lactic acid 24g / L;

[0088] Glycine 5g / L;

[0089] Ammonia to adjust the pH to 4.5.

[0090] Second, the preparation of electroless nickel plating solution:

[0091] 1) Prepare lactic acid solution and sodium acetate solution respectively, and mix the two solutions to obtain mixed solution A;

[0092] 2) preparing a nickel sulfate solution, adding the mixed solution A to the nickel sulfate solution to obtain a mixed solution B;

[0093] 3) Prepare sodium hypophosphite solution and glycine solution respectively, and mix the two solutions to obtain mixed solution C;

[0094] 4) Add mixed solution C to mixed solution B, add distilled water to make up to 1 L to obtain mixed solution D, adjust the pH of mixed solution D to 4.5 with ammonia water, and obtain an electroless nickel plating solution.

[009...

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Abstract

The present invention discloses a chemical nickel plating solution and a preparation method thereof, a method for carrying out nickel plating on a nano-LiFePO4 / C composite material by using the chemical nickel plating solution, and a resulting product thereof. The chemical nickel plating solution comprises the following components, 25-35 g / L of nickel sulfate, 20-30 g / L of sodium hypophosphite, 10-30 g / L of sodium acetate, 10-50 g / L of an organic hydroxy acid, and 5-20 g / L of an amino acid. An ammonia water is adopted to adjust the pH value of the chemical nickel plating solution to 4-7. After the chemical nickel plating solution of the present invention is adopted to carry out nickel plating on a nano-LiFePO4 / C composite material, elementary nickel content in the resulting composite material formed by coating the metal nickel on the surface of the nano-LiFePO4 / C composite material is 0.5-12 (wt)%, and the resulting composite material has characteristics of excellent charge-discharge performance (especially excellent high rate discharge performance), low internal resistance, excellent electrical conductivity, and high tap density.

Description

technical field [0001] The invention relates to the field of material surface chemical treatment, in particular to an electroless nickel plating solution, a preparation method thereof and the treatment of nano LiFePO with the plating solution. 4 / C composite material is carried out the method for nickel-plating and the product obtained therefrom. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, no pollution, small self-discharge and good cycle performance, and are considered to be high-tech products developed in the 21st century. Compared to traditional LiCoO 2 、LINiO 2 and LiMn 2 o 4 , olivine-type LiFePO 4 It has relatively high specific energy (170mAh / g), good chemical stability and thermal stability, and rich sources of raw materials. It is an ideal cathode material for lithium-ion batteries. At present, the lithium iron phosphate cathode material has been widely valued, and the development of research and industriali...

Claims

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Application Information

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IPC IPC(8): C23C18/36B22F1/02
Inventor 王红强李庆余张晓辉季晶晶朱强黄有国代启发颜志雄任孟德
Owner GUANGXI NORMAL UNIV
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