Negative electrode of carbon-composite Cu3P-Cu lithium-ion battery and preparation method of negative electrode

A lithium-ion battery, cu3p-cu technology, which is applied in the field of electrochemical power supply, and achieves the effect of simple and novel synthesis method, easy operation and excellent electrochemical performance

Active Publication Date: 2015-08-26
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on Cu3P anode materials includes simply compounding with carbon, and growing Cu3P on a copper substrate. Compared with pure CuP >3P significantly improved, but still not ideal
There is no report on the preparation and electrochemical performance of carbon composite Cu3P-Cu electrode

Method used

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  • Negative electrode of carbon-composite Cu3P-Cu lithium-ion battery and preparation method of negative electrode
  • Negative electrode of carbon-composite Cu3P-Cu lithium-ion battery and preparation method of negative electrode
  • Negative electrode of carbon-composite Cu3P-Cu lithium-ion battery and preparation method of negative electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Cu 3 The specific steps of the preparation method of P / C-Cu are:

[0024] (1) Clean the surface of foamed copper (Changsha Liyuan New Materials Co., Ltd.) with hydrochloric acid with a concentration of 10-30% to remove oxides on the surface;

[0025] (2) Dissolve citric acid (Sinopharm Group) in deionized water to form a uniform solution with a concentration of 2g / L; completely immerse the foamed copper in step (1) in the solution;

[0026] (3) Place the copper foam adsorbed with citric acid in step (2) in a vacuum oven and dry at 50°C; weigh 2g of red phosphorus (Sinopharm) with a purity of 98% and spread it on a ceramic boat with a thickness of 1.0 ~3.0mm; then place the dried copper foam (separated by foam copper fines) on top of the red phosphorus, and sinter at 350°C for 3h under the protection of nitrogen.

[0027] figure 1 The XRD pattern analysis of the prepared sample can correspond to Cu 3 Diffraction peaks of P and copper foam. The obtained samples were...

Embodiment 2

[0029] Cu 3 The specific steps of the preparation method of P / C-Cu are:

[0030] (1) Clean the surface of foamed copper (Changsha Liyuan New Materials Co., Ltd.) with hydrochloric acid with a concentration of 10-30% to remove oxides on the surface;

[0031] (2) Dissolve glucose (Sinopharm Group) in deionized water to form a uniform solution with a concentration of 2g / L; completely immerse the foam copper in step (1) in the solution;

[0032] (3) Put the glucose-adsorbed copper foam in step (2) in a vacuum oven and dry at 50°C; weigh 2g of red phosphorus (Sinopharm) with a purity of 98% and spread it on a ceramic boat with a thickness of 1.0~ 3.0mm; then place the dried copper foam (separated by copper foam fines) on top of the red phosphorus, and sinter at 350°C for 3 hours under the protection of nitrogen. Cu obtained by the above steps 3 The P / C-Cu negative electrode was cut into 14mm discs and dried in vacuum at 120°C for 12h. Lithium metal sheet is used as the counter ...

Embodiment 3

[0034] Cu 3 The specific steps of the preparation method of P / C-Cu are:

[0035] (1) Clean the surface of foamed copper (Changsha Liyuan New Materials Co., Ltd.) with hydrochloric acid with a concentration of 10-30% to remove oxides on the surface;

[0036] (2) Dissolve sucrose (Sinopharm Group) in deionized water to form a uniform solution with a concentration of 2g / L; completely immerse the foamed copper in step (1) in the solution;

[0037] (3) Place the copper foam adsorbed on sucrose in step (2) in a vacuum oven at 50°C to dry; weigh 2g of red phosphorus (Sinopharm) with a purity of 98% and spread it on a ceramic boat with a thickness of 1.0~ 3.0mm; then place the dried copper foam (separated by copper foam fines) on top of the red phosphorus, and sinter at 350°C for 3 hours under the protection of nitrogen. Cu obtained by the above steps 3 The P / C-Cu negative electrode was cut into 14mm discs and dried in vacuum at 120°C for 12h. Lithium metal sheet is used as the co...

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Abstract

The invention provides a negative electrode material of a carbon-composite Cu3P-Cu lithium-ion battery. The negative electrode material is Cu3P / C growing on the surface of copper foam in situ, wherein a preparation method of the negative electrode material comprises the following steps: cleaning the surface of copper foam with dilute hydrochloric acid; then completely immersing the copper foam in a carbon precursor solution to obtain the carbon precursor-absorbed copper foam, placing the carbon precursor-absorbed copper foam in a vacuum oven, and drying the carbon precursor-absorbed copper foam at 50 DEG C to obtain copper foam; tiling red phosphorus with the purity greater than 98% in a ceramic material boat according to a tiling thickness of 1.0-3.0 mm, placing the copper foam on the red phosphorus, arranging copper foam fines around the copper foam, and sintering the copper foam at 350 DEG C for 5 hours under the protection of nitrogen. According to the invention, the synthesis method is simple, novel and easy to operate; a carbon source is citric acid, glucose, sucrose and the like; a conductive substrate is the copper foam; in Cu3P / C-Cu, Cu3P / C grows on the surface of the copper foam in situ and is in good contact with the copper foam; the prepared materials are excellent in electrochemical properties and have a potential application value in lithium-ion batteries.

Description

technical field [0001] The invention relates to a class of binder-free high-performance lithium-ion battery electrodes, in particular to a carbon composite Cu 3 The preparation method of P-Cu and its lithium storage characteristics belong to the field of electrochemical power source. technical background: [0002] Lithium-ion batteries have the advantages of high working voltage, high specific capacity, large specific power, stable charge and discharge potential curve, long cycle life, no memory effect, small self-discharge, and environmental friendliness. The third generation of small batteries are widely used in mobile portable devices such as notebook computers and mobile phones. In addition, lithium-ion batteries are also considered to be an ideal power source for future electric vehicles. The traditional lithium-ion battery electrode preparation method usually first mixes the electrode material with a binder and a conductive agent in a certain proportion, then stirs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/136H01M4/1397H01M4/587
CPCH01M4/136H01M4/1397H01M4/587H01M2220/30Y02E60/10
Inventor 倪世兵马建军张继成杨学林
Owner CHINA THREE GORGES UNIV
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