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Electrochemical deposition preparation for lithium ionic cell tin-cobalt alloy film electrode

A lithium-ion battery, tin-cobalt alloy technology, applied in battery electrodes, alkaline battery electrodes, circuits, etc., can solve the problems of complex preparation process and large volume expansion of polystyrene balls, and achieve good cycle performance, high capacity, The effect of mitigating the effect of volume expansion

Inactive Publication Date: 2009-07-08
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results show that the electrochemical performance of the tin-cobalt alloy thin film electrode has been improved, but the thin film electrode still exhibits a large volume expansion during cycling, and the preparation process of the polystyrene sphere as a template is complicated, and after electrolysis The template needs to be washed off after chemical deposition

Method used

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  • Electrochemical deposition preparation for lithium ionic cell tin-cobalt alloy film electrode
  • Electrochemical deposition preparation for lithium ionic cell tin-cobalt alloy film electrode
  • Electrochemical deposition preparation for lithium ionic cell tin-cobalt alloy film electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 1. Preparation of electrolyte solution of tin-cobalt 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 CoCl 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. First add the SnCl2 solution to the K 4 P 2 o 7 solution, and then CoCl 2 solution added to K 4 P 2 o 7 Then add 5g of L-methionine 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 purple tin-cobalt electrolyte.

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

[0037] 3. Electrochemical deposition is...

Embodiment 2

[0043] 1. Preparation of electrolyte solution of tin-cobalt 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 CoSO with 100ml distilled water 4· 7H 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, and then Co(NO 3 ) 2 solution added to K 4 P 2 o 7 Then add 5g of hydroxylammonium hydrochloride, 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 purple tin-cobalt electrolyte.

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

[0049] 3. Electrochemical deposition ...

Embodiment 3

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

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

[0054] b. In a 100ml beaker, heat and dissolve 15g CoCl 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, and then CoCl 2 solution added to K 4 P 2 o 7 Then add 5gL-methionine 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 purple tin-cobalt electrolyte.

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

[0058] 3. Electrochemical deposition is carried o...

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Abstract

The invention provides an electrical chemical depositing method for preparing lithium battery tin-cobalt alloy thin film electrode which has characteristics that foam nickel with a plurality of holes is used as basic body, the tin-cobalt alloy thin film is obtained by electrical chemical depositing on the foam nickel basic body for manufacturing lithium battery tin-cobalt alloy thin film electrode. The method has advantages of simple practical and low cost, and the tin-cobalt alloy thin film electrode is distributed on the foam nickel basic body that can ease electrode expansion in charge / discharge cycle process for improving cycle performance of battery. The method has latent application prospect in the lithium battery electrode material field.

Description

technical field [0001] The invention relates to a preparation method of an electrode material, in particular to a preparation method of a tin-cobalt alloy thin 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. [0003] At present, the methods for preparing tin-cobalt alloy mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/60H01M4/29H01M4/38
Inventor 张大伟戴俊贾冲陈静娟杨晨戈
Owner HEFEI UNIV OF TECH
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