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Carbon film lithium ion battery anode and production method

A lithium-ion battery and production method technology, applied in the field of lithium-ion batteries, can solve the problems of negative electrode mass-specific capacity improvement, unfavorable lithium-ion batteries, high mass ratio, etc.

Inactive Publication Date: 2016-08-03
周虎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improving the specific energy of lithium-ion batteries requires increasing the mass-specific capacity of the negative electrode of the lithium-ion battery. The mass proportion of the negative electrode current collector copper foil is too large, which is not conducive to the improvement of the mass-specific capacity of the negative electrode of the lithium-ion battery.

Method used

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  • Carbon film lithium ion battery anode and production method
  • Carbon film lithium ion battery anode and production method
  • Carbon film lithium ion battery anode and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add the petroleum asphalt to the melting tank, and the petroleum asphalt forms a thin layer of asphalt on the surface of the molten tin in the melting tank; the thin layer of asphalt is carbonized at about 1000 °C to form a mesophase carbon film; the mesophase carbon film is further heated, at 2000 °C The graphite film formed by the above high-temperature graphitization; the graphite film is processed into a lithium-ion battery negative electrode according to a certain shape and size.

Embodiment 2

[0014] Add coal tar pitch to the melting tank, and the coal tar pitch forms a thin layer of pitch on the surface of the molten lead in the melting tank; the thin layer of pitch is carbonized at about 1000 °C to form a mesophase carbon film; the mesophase carbon film is further heated, at 2000 °C The graphite film formed by the above high-temperature graphitization; the graphite film is processed into a lithium-ion battery negative electrode according to a certain shape and size.

Embodiment 3

[0016] Add petroleum asphalt to the melting tank, and the petroleum asphalt forms a thin layer of asphalt on the surface of the molten tin in the melting tank; the thin layer of asphalt is heated at about 2000°C to carbonize to form a carbon film; the carbon film is processed into a lithium-ion battery according to a certain shape and size negative electrode.

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Abstract

Provided are a carbon film lithium ion battery anode and a production method. A carbon film can serve as an anode current collector and can also serve as an anode active substance. The carbon film can be an intermediate phase carbon film, namely the carbon film formed by carbonizing an organic polymer material at the temperature of 800 to 2000 DEG C, and the carbon content is 90% or above. The carbon film can also be a graphite film, the graphite film formed by graphitizing the intermediate phase carbon film at the high temperature of 2000 DEG C, and the content is 99% or above. The carbon film can also be a composite carbon film, a middle layer is graphite, and an outer layer is intermediate phase carbon.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a negative electrode of the lithium ion battery. Background technique [0002] The negative electrode of the lithium-ion battery mainly includes a negative electrode current collector, a negative electrode active material, a binder, and a negative electrode additive. The negative electrode current collector is generally copper foil, the negative electrode active material is generally carbon material, the binder is generally an organic polymer binder, and the additive is generally a conductive agent. Among them, only the negative electrode active material participates in the chemical process of battery charge and discharge, and other materials only have auxiliary functions. Improving the specific energy of lithium-ion batteries requires increasing the mass-specific capacity of the negative electrode of the lithium-ion battery. The mass proportion of the negative electrode current collecto...

Claims

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Application Information

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IPC IPC(8): H01M4/133H01M4/1393H01M4/583H01M4/66H01M10/0525
CPCH01M4/133H01M4/1393H01M4/583H01M4/663H01M10/0525Y02E60/10
Inventor 周虎周思齐
Owner 周虎
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