Tin alloy membrane electrode and application thereof

A thin-film electrode and tin alloy technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of complex process, unfavorable industrialization, and high energy consumption, and achieve the effect of simple preparation process, stable performance, and increased contact area

Active Publication Date: 2013-05-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In previous experiments, tin-based thin film materials were basically prepared by magnetron sputtering. This method consumes a lot of energy and is complicated, which is not conducive to industrialization.

Method used

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  • Tin alloy membrane electrode and application thereof
  • Tin alloy membrane electrode and application thereof
  • Tin alloy membrane electrode and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0039] Add 100ml of distilled water to a 250ml beaker and add concentrated sulfuric acid dropwise to control the pH of the plating solution at 1.0, then add 4g of citric acid, 8g of sodium hypophosphite, 4g of thiourea, 0.03mol of stannous sulfate, and 0.06g of silver nitrate, and heat the plating solution to 30-40°C. 1cm 2 The copper foil was corroded with 0.5 mol / L sulfuric acid for 10 minutes, then washed with distilled water, dried in vacuum, put into the plating solution, the reaction time was 60s, and dried to obtain the product.

[0040] The test battery is composed of tin thin film negative electrode, metal lithium sheet and Asahi Kasei PP / PE / PP diaphragm, and the electrolyte is 1 mol / L LiPF6 / (m(EC):m(DMC)=1:1). Then assemble it into a 2032 type button half battery. The electrochemical test was carried out on the Land battery test system (CT 2001A), the voltage range was 0.01-1.5 V, and the current density was 0.1 mA / cm 2 .

[0041] Scanning electron microscopy is ...

Embodiment 1-2

[0044]Add 100ml of distilled water to a 250ml beaker and add concentrated sulfuric acid dropwise to control the pH of the plating solution at 1.0, then add 4g of citric acid, 8g of sodium hypophosphite, 4g of thiourea, 0.02mol of stannous sulfate, and 0.04g of silver nitrate, and heat the plating solution to 30-40°C. 1cm 2 The copper foil was corroded with 0.5 mol / L sulfuric acid for 10 minutes, then washed with distilled water, dried in vacuum, put into the plating solution, the reaction time was 60s, and dried to obtain the product.

[0045] The test battery is composed of tin thin film negative electrode, metal lithium sheet and Asahi Kasei PP / PE / PP diaphragm, and the electrolyte is 1 mol / L LiPF6 / (m(EC):m(DMC)=1:1). Then assemble it into a 2032 type button half battery. The electrochemical test was carried out on the Land battery test system (CT 2001A), the voltage range was 0.01-1.5 V, and the current density was 0.1 mA / cm 2 .

Embodiment 1-3

[0047] Add 100ml of distilled water to a 250ml beaker and add concentrated sulfuric acid dropwise to control the pH of the plating solution at 1.0, then add 4g of citric acid, 8g of sodium hypophosphite, 4g of thiourea, 0.04mol of stannous sulfate, and 0.08g of silver nitrate, and heat the plating solution to 30-40°C. 1cm 2 The copper foil was corroded with 0.5 mol / L sulfuric acid for 10 minutes, then washed with distilled water, dried in vacuum, put into the plating solution, the reaction time was 60s, and dried to obtain the product.

[0048] The test battery is composed of tin thin film negative electrode, metal lithium sheet and Asahi Kasei PP / PE / PP diaphragm, and the electrolyte is 1 mol / L LiPF6 / (m(EC):m(DMC)=1:1). Then assemble it into a 2032 type button half battery. The electrochemical test was carried out on the Land battery test system (CT 2001A), the voltage range was 0.01-1.5 V, and the current density was 0.1 mA / cm 2 .

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Abstract

The invention discloses a tin alloy membrane electrode and an application thereof. The tin alloy membrane electrode is prepared by the following steps: (1) preparing chemical plating solution by using thiourea, citric acid, sodium hypophosphite, concentrated sulfuric acid, stannous sulfate, nitrate of metal M and water, wherein the metal M is Ag, Fe, Ni, Co, Zn, Al, Mg or Cu; a pH (Potential Of Hydrogen) value of the chemical plating solution is in a range of 0.8-1.1, the concentration of the thiourea is 40-200g / L, the concentration of the citric acid is 20-80g / L, the concentration of the sodium hypophosphite is 30-160g / L, the concentration of the stannous sulfate is 0.1-0.4mol / L, and the concentration of the nitrate of the metal M is 0.1-1g / L; (2) corroding a copper foil by using sulfuric acid with the concentration of 0.3-0.6mol / L for 10-15 minutes, and then washing and drying by distilled water; and (3) placing the corroded copper foil in the chemical plating solution with the temperature kept within a range of 30-40 DEG C, and reacting for 30-120s; forming a tin alloy membrane on the surface of the copper foil; and drying to obtain the tin alloy membrane electrode. The invention further provides an application of the tin alloy membrane electrode as a cathode of a lithium ion battery, and has the advantages of high capacity and stable properties.

Description

(1) Technical field [0001] The invention relates to a tin alloy thin film electrode and its application as a lithium ion battery negative electrode. (2) Background technology [0002] As people's awareness of environmental protection increases, the use of toxic metals such as lead and cadmium is increasingly restricted. In addition, with the rapid development of industrial technology and electronic technology, people's demand for high-capacity, small-volume chemical power supplies continues to increase. Therefore, it is necessary to find new high-capacity green secondary batteries that can replace traditional lead-acid batteries and nickel-cadmium batteries. Lithium-ion batteries are naturally one of the strong candidates. [0003] Since the commercialization of lithium-ion batteries in 1990, they have been widely used in electronic products. In order to meet the development of pure electric vehicles and hybrid electric vehicles, it is necessary to find new negative electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/134C23C18/48
CPCY02E60/122Y02E60/10
Inventor 王连邦姚金翰张品杰
Owner ZHEJIANG UNIV OF TECH
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