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Preparing method of tin-nickel-carbon composite cathode material of lithium ion battery

A technology for lithium-ion batteries and negative electrode materials, which is applied in battery electrodes, circuits, electrical components, etc., can solve problems such as difficult application, unstable electrodeposition process specifications, and low carbon content in the coating, achieving low cost and excellent electrochemical performance. , the effect of simple process

Inactive Publication Date: 2011-07-27
SHANDONG JIANZHU UNIV
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Problems solved by technology

Among them, the electrodeposition method is simple in process, easy to scale up, and has a strong combination with the current collector, which has important research value. However, the current electrodeposition process specification is unstable, and the carbon content in the coating is low, so it is difficult to be applied.

Method used

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Embodiment Construction

[0023] A method for preparing a tin-nickel-carbon composite negative electrode material for a lithium-ion battery of the present invention uses an electrodeposition process to prepare a lithium-ion battery tin-nickel-carbon composite negative electrode material; the electrodeposition process is:

[0024] Process (1): Graphite powder → surface chemical modification treatment → adding pyrophosphate alloy plating solution → ultrasonic dispersion;

[0025] Process (2): copper foil current collector → activation treatment;

[0026] Process (3): The copper foil current collector finally obtained in process (2) is used as a cathode, the hard graphite plate is used as an anode, and the plating solution obtained in process (1) is used as an electrolyte to perform electrodeposition coating, and finally a composite coating is obtained.

[0027] The particle size of graphite powder is 5-12 μm. The graphite is processed by a ball milling method to obtain graphite powder with a particle si...

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Abstract

The invention discloses a preparing method of tin-nickel-carbon composite cathode material of a lithium ion battery, which belongs to the technical field of lithium ion batteries. The tin-nickel-carbon composite cathode material is prepared through electrodeposition process; the electrodeposition process comprises the following processes: I. conducting graphite powder, surface chemical modification treatment for the graphite powder, pyrophosphate alloy bath adding and ultrasonic dispersion for the pyrophosphate alloy bath containing the graphite powder; II. conducting copper foil current collector and activating treatment; and III. by taking the copper foil current collector obtained in the process II as a cathode, taking a hard graphite plate as a cathode and taking bath obtained in the process I as an electrolyte, performing electrodeposition film coating, to obtain a composite deposited finally. Compared with the prior art, the preparing method adopting electrodeposition to prepare the tin-nickel-carbon composite cathode material has the characteristics of low cost, simple preparing process, excellent electrochemical performance, long service life and the like.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a method for preparing a tin-nickel-carbon composite negative electrode material for lithium-ion batteries. Background technique [0002] Due to the shortage of energy and the increasingly serious urban environmental pollution, it is an urgent social problem that the world is facing to find an alternative energy source that replaces oil, is environmentally friendly and clean, and solves urban air pollution. Advanced electric vehicles are recognized as the future It is the most important way to develop energy-saving, environment-friendly and green transportation. At present, the electric vehicles and hybrid vehicles that are competing to develop in various countries need batteries to provide power. As the supporting power supply of electric vehicles, the outstanding performance of lithium-ion batteries has unique advantages. Positive and negative active materials in...

Claims

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Application Information

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IPC IPC(8): H01M4/139H01M4/1393
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 冯立明魏雪
Owner SHANDONG JIANZHU UNIV
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