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Lithium ion battery and its prescription of anode material

A lithium-ion battery, cathode material technology, applied in battery electrodes, secondary batteries, active material electrodes, etc., can solve the problems of poor thermal stability, shortened service life, battery bulging, etc., and achieve improved thermal stability and short-circuit performance. Improved, high thermal stability effect

Inactive Publication Date: 2008-01-09
JIANGSU TENPOWER LITHIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal stability of currently used lithium-ion batteries is relatively poor. When the internal temperature exceeds 200°C, the lithium cobalt oxide in the positive electrode begins to decompose, and the released oxygen reacts with the battery electrolyte, releasing a large amount of heat. Causes many lithium-ion batteries to bulge during use, shortening their service life

Method used

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Embodiment 1

[0009] The formula of lithium ion battery cathode material according to the present invention, the percentage by weight of its various components are respectively: lithium cobalt oxide 65%, nickel cobalt lithium manganese oxide 18%, conductive graphite 8% and polyvinylidene fluoride 4%, the rest For impurities.

Embodiment 2

[0011] The formula of lithium ion battery positive electrode material described in the present invention, the percentage by weight of its various components is respectively: lithium cobaltate 72%, nickel cobalt lithium manganese oxide 15%, conductive graphite 5% and polyvinylidene fluoride 2%, the rest For impurities.

Embodiment 3

[0013] The formula of lithium ion battery anode material described in the present invention, the percentage by weight of its various components are respectively: lithium cobalt oxide 70%, lithium nickel cobalt manganese oxide 16%, conductive graphite 7% and polyvinylidene fluoride 3%, the rest For impurities.

[0014] The lithium ion battery of the present invention comprises: a negative electrode whose main component is graphite, an electrolyte whose main component is ethylene carbonate or lithium hexafluorophosphate, and lithium cobalt oxide, nickel cobalt lithium manganate, conductive graphite and polyvinylidene fluoride A positive electrode made of two materials according to the ratio described in any one of the above-mentioned embodiments.

[0015] Due to the high thermal stability of nickel-cobalt lithium manganese oxide (PLB), when nickel-cobalt lithium manganese oxide (PLB) is added to the positive electrode material of lithium-ion batteries, the thermal stability of t...

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PUM

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Abstract

The invention is concerned with the description of the anode lithium ion battery material to improve its battery thermal stability, and the proportions are: lithium cobaltoxide 65%-72%, Li(Mn1 / 3Co1 / 3Ni1 / 3)O2 15%-18%, conductive graphite 5%-8%, vinylidene fluoride 2%-4% and the rest are impurity. The anode lithium ion battery is with high heat stability and short-circuits ability.

Description

technical field [0001] The invention relates to the formula of lithium ion battery and positive electrode material thereof. Background technique [0002] At present, the commonly used lithium-ion battery is commonly referred to as a lithium battery. The main component of the positive electrode material is lithium cobalt oxide, the main component of the negative plate material is conductive graphite, and the main component of the electrolyte is ethylene carbonate or lithium hexafluorophosphate. Since lithium cobalt oxide is used as the main material for the positive electrode of the lithium-ion battery, the lithium-ion battery has a high working voltage (the average working voltage is 3.7V), stable charging and discharging voltage, suitable for high-current charging and discharging, high specific energy, and good cycle performance. And high conductivity, simple production process, easy preparation and other characteristics, it has been widely used in many fields. However, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/48H01M4/62H01M4/02H01M10/40H01M10/36
CPCY02E60/122Y02E60/10
Inventor 杨清欣秦建明沈春平
Owner JIANGSU TENPOWER LITHIUM
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