Method for preparing nickeltin thin film electrode for lithium ion battery through electrochemical deposition

A lithium-ion battery, nickel-tin alloy technology, applied in battery electrodes, electrode manufacturing, circuits, etc., can solve problems such as large volume expansion and complex polystyrene ball preparation process, and achieve high capacity, good cycle performance, and easy scale. The effect of chemical production

Inactive Publication Date: 2009-06-03
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The results show that the electrochemical performance of this nickel-tin alloy thin film electrode has been improved, but this thin film electrode still exhibits large volume expansion during cycling, and the preparation process of polystyrene spheres as templates is complicated, and in After electrochemical deposition, the template needs to be washed away

Method used

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  • Method for preparing nickeltin thin film electrode for lithium ion battery through electrochemical deposition
  • Method for preparing nickeltin thin film electrode for lithium ion battery through electrochemical deposition
  • Method for preparing nickeltin thin film electrode for lithium ion battery through electrochemical deposition

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 1. Preparation of electrolyte solution of nickel-tin alloy

[0032] a. In a 100ml beaker, dissolve 15g of SnCl with 20ml of pure hydrochloric acid 2 .2H 2 O is heated and dissolved, and diluted to 100ml after dissolution;

[0033] b. In a 100ml beaker, heat and dissolve 15g NiCl with 100ml distilled water 2 .6H 2 O;

[0034] c. In a 500ml beaker, heat and dissolve 200g K with 200ml distilled water 4 P 2 o 7 .

[0035] d. SnCl first 2 solution added to K 4 P 2 o 7 solution, then NiCl 2 solution added to K 4 P 2 o 7 Then add 5g of L-glutamic acid to the solution, adjust the pH of the solution to 7-9 with ammonia water, and finally set the volume to 500ml with a volumetric flask to obtain a green nickel-tin electrolyte.

[0036] 2. The electrochemical deposition system is composed of nickel foam as the cathode, graphite electrode as the anode, DC power supply and electrolytic cell containing nickel-tin metal ions;

[0037] 3. Electrochemical deposition is ...

Embodiment 2

[0043] 1. Preparation of electrolyte solution of nickel-tin alloy

[0044] a. In a 100ml beaker, dissolve 15g Na with 20ml pure hydrochloric acid 2 SnO 3 .3H 2 O is heated and dissolved, and diluted to 100ml after dissolution;

[0045] b. In a 100ml beaker, heat and dissolve 15g NiCl with 100ml distilled water 2 .6H 2 O;

[0046] c. In a 500ml beaker, heat and dissolve 200g K with 200ml distilled water 4 P 2 o 7 .

[0047] d. Na 2 SnO 3 solution added to K 4 P 2 o 7 solution, then NiCl 2 solution added to K 4 P 2 o 7 Then add 5g of L-glutamic acid to the solution, adjust the pH of the solution to 7-9 with ammonia water, and finally set the volume to 500ml with a volumetric flask to obtain a green nickel-tin electrolyte.

[0048] 2. The electrochemical deposition system is composed of nickel foam as the cathode, graphite electrode as the anode, DC power supply and electrolytic cell containing nickel-tin metal ions;

[0049] 3. Electrochemical deposition is carr...

Embodiment 3

[0052] 1. Preparation of electrolyte solution of nickel-tin alloy

[0053] a. In a 100ml beaker, dissolve 15g of SnCl with 20ml of pure hydrochloric acid 2 .2H 2 O is heated and dissolved, and diluted to 100ml after dissolution;

[0054] b. In a 100ml beaker, heat and dissolve 15g NiCl with 100ml distilled water 2 .6H 2 O;

[0055] c. In a 500ml beaker, heat and dissolve 200g K with 200ml distilled water 4 P 2 o 7 ;

[0056] d. SnCl first 2 solution added to K 4 P 2 o 7 solution, then NiCl 2 solution added to K 4 P 2 o 7 Then add 5g of L-glutamic acid to the solution, adjust the pH of the solution to 7-9 with ammonia water, and finally set the volume to 500ml with a volumetric flask to obtain a green nickel-tin electrolyte.

[0057] 2. The electrochemical deposition system is composed of nickel foam as the cathode, graphite electrode as the anode, DC power supply and electrolytic cell containing nickel-tin metal ions;

[0058] 3. Electrochemical deposition is ...

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Abstract

The invention relates to a method for producing lithium ion battery nickeltin thin-film electrode through electrochemical deposition. The method is characterized in that porous foamed nickel is adopts as the matrix, a nickeltin thin-film is obtained from the foamed nickel matrix through electrochemical deposition, and the lithium ion battery nickeltin thin-film electrode taking the foamed nickel as the matrix is produced. The method is simple, convenient and feasible, the cost is low, the nickeltin thin-film electrodes are distributed on the foamed nickel matrix, the expansion of the electrodes in the charging and discharging cyclic process can be eased, therefore, the cycle performance of the battery is improved, and the invention has potential application prospect on the application aspect of the electrode material of the lithium ion battery.

Description

technical field [0001] The invention relates to a preparation method of an electrode material, in particular to a preparation method of a nickel-tin alloy film electrode of a lithium ion battery. Background technique [0002] At present, the commercial lithium-ion battery anodes mainly use carbon materials. Existing studies have shown that tin-based compounds are most likely to become the next-generation lithium-ion battery anode materials due to their high capacity advantages. The active component tin in the tin-based alloy can undergo a reversible alloying reaction with lithium, and has good lithium intercalation and desorption properties; the formation of Li 4.4 For Sn alloy, its theoretical mass specific capacity is 994mAh / g, and its volume specific capacity can be as high as 7200mAh / cm 3 , which is much higher than the current graphitized carbon materials, so it is a promising anode material. The key problem that plagues the development of tin-based materials is the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04C25D3/56C25D7/00H01M4/38
CPCY02E60/12Y02E60/10
Inventor 张大伟戴俊贾冲吴卫丰
Owner HEFEI UNIV OF TECH
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