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Lithium ion battery and anode material thereof

A lithium-ion battery and positive electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of not being able to improve the high-temperature storage performance of the battery, and not being able to obtain battery performance, and achieve excellent electrochemical performance, excellent cycle performance, The effect of high energy density

Active Publication Date: 2012-01-25
DONGGUAN AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simple mechanical mixing of the two materials does not yield satisfactory battery performance and does not improve the battery's high-temperature storage performance.

Method used

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  • Lithium ion battery and anode material thereof
  • Lithium ion battery and anode material thereof
  • Lithium ion battery and anode material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 0.475g isopropyl titanate (Ti[OCH(CH 3 ) 2 ] 4 ) and 0.378g aluminum isopropoxide (C 9 h 21 AlO 3 ) was added to 200mL of absolute ethanol, stirred to make it evenly mixed, and then 60g of LiCoO 2 and 40g Li(Ni 0.5 co 0.2 mn 0.3 )O 2 The homogeneous mixture was added therein, and after stirring for 2 hours, the above-mentioned liquid was separated into solid and liquid, and the obtained solid was vacuum-dried at 120°C, and then tempered in air at 600°C for 3 hours to obtain the positive electrode material of the present invention. The XRD spectrum of above-mentioned composite cathode material is as follows figure 1 shown.

[0043] The first-time reversible capacity of the above-mentioned composite positive electrode material measured in the button battery is 150.8mAh / g, and the first-time efficiency is 90.3%. The capacity retention rate of the above positive electrode material after 500 cycles in 454261 pouch battery is 88.6%. The cycle curve is as follows: ...

Embodiment 2

[0045] 0.178g isopropyl titanate (Ti[OCH(CH 3 ) 2 ] 4 ) and 0.606g aluminum isopropoxide (C 9 h 21 AlO 3 ) was added to 200mL of absolute ethanol, stirred to make it evenly mixed, and then 60g of LiCoO 2 and 40g Li(Ni 0.8 co 0.1 mn 0.1 )O 2 The homogeneous mixture was added therein, and after stirring for 2 hours, the above-mentioned liquid was separated into solid and liquid, and the obtained solid was vacuum-dried at 120°C, and then tempered in air at 600°C for 3 hours to obtain the positive electrode material of the present invention.

[0046] The first reversible capacity of the above-mentioned composite cathode material measured in a button battery is 158.9mAh / g, and the first efficiency is 89.4%. The capacity retention rate of the above positive electrode material after 500 cycles in 454261 pouch battery is 86.7%. The cycle curve is as follows: image 3 As shown, the 85°C / 4h high-temperature storage thickness expansion rate is 10%, and the 85°C / 4h high-temperat...

Embodiment 3

[0048] 1.112g aluminum nitrate nonahydrate (Al(NO 3 ) 3 9H 2 O) and 0.031g lanthanum nitrate hexahydrate (La(NO 3 ) 3 ·6H 2 O) added to 200mL deionized water, stirred to make it evenly mixed, and then 60g LiCoO 2 and 40g Li(Ni 0.8 co 0.1 mn 0.1 )O 2 The homogeneous mixture was added therein, and after stirring for 2 hours, the above-mentioned liquid was separated into solid and liquid, and the obtained solid was vacuum-dried at 120°C, and then tempered in air at 600°C for 3 hours to obtain the positive electrode material of the present invention.

[0049] The first-time reversible capacity of the above-mentioned composite cathode material measured in a button battery is 159.2mAh / g, and the first-time efficiency is 89.5%. The capacity retention rate of the above positive electrode material after 500 cycles in 454261 pouch battery is 81.3%. The cycle curve is as follows: Figure 4 As shown, the 85°C / 4h high-temperature storage thickness expansion rate is 36%, and the 8...

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Abstract

The invention belongs to the technical field of a lithium ion battery, and particularly relates to a lithium ion battery and an anode material thereof. A nickel-cobalt-manganese ternary material with a suitable granularity and a lithium cobalt oxide anode material are selected and mixed, the ratio of the two materials is strictly controlled and the compound anode material after being mixed is subjected to cladding treatment, thereby acquiring the material with a greatly increased gram-capacity relative to pure lithium cobalt oxide, greatly increasing the space use ratio of an anode diaphragm and acquiring the anode diaphragm with a compaction density of over 4.0g / cm<3>. The compound anode material can be used for preparing the lithium ion battery with excellent electrochemical property, excellent safety performance and higher energy density, and meanwhile, the high-temperature memory property of the lithium ion battery is obviously improved and the circulating property is excellent.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a high-density, high-capacity lithium-ion battery cathode material, a high-energy-density lithium-ion battery using the cathode material, and the cathode material. Background technique [0002] Lithium-ion batteries have become one of the most widely used secondary batteries due to their advantages such as high energy density, high specific power, high working voltage, good cycle performance, no memory effect, and no pollution. With the rapid development of electronic technology, people put forward higher energy density and longer cycle performance requirements for lithium-ion batteries. Compared with negative electrode materials, research on positive electrode materials that provide lithium sources for lithium-ion batteries lags behind. Therefore, the development of high-performance cathode materials is particularly important for the development of lit...

Claims

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Application Information

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IPC IPC(8): H01M4/525H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 华斌
Owner DONGGUAN AMPEREX TECH
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