Lithium ion battery anode material and lithium ion battery prepared therefrom

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of increased battery temperature and internal pressure, irreversible changes in the structure of positive active materials, explosions, and combustion, etc., to improve durability The effect of overcharge performance

Inactive Publication Date: 2010-06-16
TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the lithium-ion battery is overcharged, the battery voltage rises rapidly with the increase of polarization, which will cause irreversible changes in the structure of the positive active material and the decomposition of the electrolyte, generating a large amount of gas and releasing a large amount of heat, which will cause a sharp increase in the temperature and internal pressure of the battery. , there are hidden dangers such as explosion and combustion

Method used

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  • Lithium ion battery anode material and lithium ion battery prepared therefrom

Examples

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Effect test

Embodiment 1

[0025] According to parts by mass, 6 parts of lithium cobalt oxide, 2 parts of nickel cobalt lithium manganate, 2 parts of spinel lithium manganate, 0.4 part of conductive carbon black and 0.4 part of polyvinylidene fluoride, N-methylpyrrolidone was used as a solvent, prepared into a slurry, coated on 16um aluminum foil and dried. The molecular formula of the lithium nickel cobalt manganese oxide that this embodiment adopts is LiNi 0.5 mn 0.3 co 0.2 o 2 , wherein the particle size D50 = 4.526um.

[0026] The pole piece is continuously rolled, cut, and super-welded aluminum strip to make the positive pole piece.

[0027] The negative electrode sheet used is graphite negative electrode.

[0028] The electrolyte solvent system used is a multicomponent mixture of ethylene carbonate (EC), ethyl methyl carbonate (EMC), and dimethyl carbonate (DMC), and its mass ratio is EC:EMC:DMC=1:1:1 , the electrolyte adopts LiF 6 PO 4 .

[0029] Wind the positive electrode sheet, negati...

Embodiment 2

[0035] This example differs from Example 1 in that the mass parts of lithium cobalt oxide, lithium nickel cobalt manganate and lithium manganate are 4.5 parts, 4.5 parts, and 1 part respectively, and the rest are the same as in Example 1. The experimental results are shown in Table 1.

Embodiment 3

[0037] The difference between this example and Example 1 is that the mass parts of lithium cobalt oxide, lithium nickel cobalt manganese oxide, lithium manganate, conductive carbon black, and polyvinylidene fluoride are 3 parts, 4 parts, 3 parts, and 0.35 parts respectively. Parts, 0.35 parts, the molecular formula of lithium nickel cobalt manganese oxide is LiNi 0.8 mn 0.05 co 0.15 o 2 , wherein particle diameter D50=3.540um, all the other are with embodiment 1. The experimental results are shown in Table 1.

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Abstract

The invention discloses a lithium ion battery anode material and a lithium ion battery prepared therefrom. The anode material comprises15-60% by weight of lithium cobaltate, 10-45% by weight of nickel-cobalt lithium manganate and 10-40% by weight of spinel lithium manganate,. The lithium ion battery anode material prescription and the lithium ion battery made from the material prescription can improve the overcharge property resistance of the lithium ion battery and can not decrease the capacity of the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery positive electrode material formulation and a lithium ion battery prepared from the positive electrode material formulation. Background technique [0002] Since the large-scale production of lithium-ion batteries in the 1990s, it has rapidly occupied the market due to its superior electrochemical performance and diversity of shape processing that cannot be compared with traditional secondary batteries (such as lead-acid batteries, nickel-metal hydride batteries, and nickel-cadmium batteries, etc.). The market is developing rapidly. At present, lithium-ion batteries have been widely used in electronic products such as mobile phones, notebook computers, PDAs, video cameras, digital cameras, mobile DVDs, MP3 and MP4, and are also playing an increasingly important role in the application fields of electric tools, electric bicycles and electric vehi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/48H01M10/36
CPCY02E60/12Y02E60/10
Inventor 滕鑫潘启明孙定元
Owner TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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