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A kind of preparation method of nano wire type sn-ni alloy negative electrode material

An alloy anode, sn-ni technology, applied in battery electrodes, structural parts, electrical components, etc., can solve the problems of complex preparation methods, low coulomb efficiency, and high preparation costs, and achieve uniform particle size, increase specific capacity, and improve cycle. The effect of service life

Active Publication Date: 2021-03-16
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of existing Sn-Ni alloy negative electrode materials such as short life, poor stability, small capacity, low early coulombic efficiency, complicated preparation method and high preparation cost, the present invention provides a preparation of nanowire-type Sn-Ni alloy negative electrode material method

Method used

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  • A kind of preparation method of nano wire type sn-ni alloy negative electrode material
  • A kind of preparation method of nano wire type sn-ni alloy negative electrode material
  • A kind of preparation method of nano wire type sn-ni alloy negative electrode material

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Embodiment 1

[0027] A method for preparing a nanowire-type Sn-Ni alloy negative electrode material, comprising the following process steps:

[0028] (1) Cu foil with a purity of 99.99% and a thickness of 11um is cut into a disc with a diameter of 2cm;

[0029] (2) Soak the tailored Cu foil in a phosphoric acid solution with a concentration of 6wt% for 5 minutes to remove the oxide layer and organic matter on the surface, then clean it with deionized water, and dry it for replacement;

[0030] (3) Weigh NiSO 4 and SnSO 4 were added to two beakers filled with 500ml deionized water to dissolve, so that NiSO 4 and SnSO 4 The concentration reaches 0.25M, then weigh boric acid and add the NiSO 4 In a beaker, weigh citric acid and add the SnSO 4 In the beaker, make the concentration of boric acid and citric acid all reach 0.01M, stir well, obtain Sn plating solution and Ni plating solution stand-by;

[0031] (4) Set the voltage of the AC stabilized power supply to 10V and the frequency to 3...

Embodiment 2

[0040] A method for preparing a nanowire-type Sn-Ni alloy negative electrode material, comprising the following process steps:

[0041] (1) Cu foil with a purity of 99.99% and a thickness of 11um is cut into a disc with a diameter of 2cm;

[0042](2) Soak the tailored Cu foil in a phosphoric acid solution with a concentration of 6wt% for 5 minutes to remove the oxide layer and organic matter on the surface, then clean it with deionized water, and dry it for replacement;

[0043] (3) Weigh NiSO 4 and SnSO 4 were added to two beakers filled with 500ml deionized water to dissolve, so that NiSO 4 and SnSO 4 The concentration reaches 0.3M, then weigh boric acid and add the NiSO 4 In a beaker, weigh citric acid and add the SnSO 4 In the beaker, make the concentration of boric acid and citric acid all reach 0.05M, stir well, obtain Sn plating solution and Ni plating solution stand-by;

[0044] (4) Set the voltage of the AC stabilized power supply to 15V and the frequency to 40H...

Embodiment 3

[0053] A method for preparing a nanowire-type Sn-Ni alloy negative electrode material, comprising the following process steps:

[0054] (1) Cu foil with a purity of 99.99% and a thickness of 11um is cut into a disc with a diameter of 2cm;

[0055] (2) Soak the tailored Cu foil in a phosphoric acid solution with a concentration of 6wt% for 5 minutes to remove the oxide layer and organic matter on the surface, then clean it with deionized water, and dry it for replacement;

[0056] (3) Weigh NiSO 4 and SnSO 4 were added to two beakers filled with 500ml deionized water to dissolve, so that NiSO 4 and SnSO 4 The concentration reaches 0.35M, then weigh boric acid and add the NiSO 4 In a beaker, weigh citric acid and add the SnSO 4 In the beaker, make the concentration of boric acid and citric acid all reach 0.1M, stir well, obtain Sn plating solution and Ni plating solution stand-by;

[0057] (4) Set the voltage of the AC stabilized power supply to 20V and the frequency to 50...

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Abstract

The invention relates to the technical field of preparation of electrolytic materials, and particularly discloses a preparation method of a nanowire Sn-Ni alloy negative electrode material. The preparation method comprises the steps: alternating current is introduced to enable Sn plating solution and Ni plating solution to be subjected to alternate electro-deposition on a base body, the depositionvoltage of each time of electro-deposition is 10-20 V, the frequency is 30-50 Hz, and the deposition time is 5-20 min; and the obtained electro-deposition material is heated to 150-200 DEG C under the protection of inert gas for annealing, heat preservation is conducted for 30-60 min, and the nanowire Sn-Ni alloy negative electrode material is obtained. The Sn-Ni alloy negative electrode materialdisclosed by the invention has the excellent characteristics of large specific capacity, high coulombic efficiency, high stability, long service life and high ionic conductivity.

Description

technical field [0001] The invention relates to the technical field of preparation of electrode materials, in particular to a preparation method of a nanowire-type Sn-Ni alloy negative electrode material. Background technique [0002] Lithium-ion batteries are considered as preferred power sources for energy storage devices, transportation, and other electronic devices due to their high energy density, cycling stability, and design flexibility. Tin-based materials have the advantages of high theoretical capacity, high bulk density and thermal stability, and are ideal anode materials for lithium-ion batteries. However, the current actual capacity of tin-based anode materials is maintained at around 500mAh / g, which is far from meeting high-power applications. In addition, during the repeated charging / discharging process, due to the particle pulverization and detachment from the matrix and the structural collapse caused by the volume expansion of tin metal, it will lead to rapi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/38H01M10/0525
CPCH01M4/38H01M4/387H01M10/0525Y02E60/10
Inventor 张惠敏秦雪明胡建文孙会元刘立虎陆子彤
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY