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Lithium ion battery adopting ternary composite cathode material and preparation method thereof

A lithium-ion battery and negative electrode material technology, which is applied in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve the problems of low irreversible capacity, poor rate performance, and low specific energy of lithium batteries, and achieve low irreversible capacity and excellent performance , Improve the effect of voltage hysteresis effect

Active Publication Date: 2015-07-08
DONGFANG ELECTRIC CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention aims to solve the defects of low specific energy, poor rate performance and low initial irreversible capacity of lithium batteries with a single negative electrode material, and provides a lithium ion battery with good safety, high charge and discharge efficiency, excellent low temperature performance and good cycle performance

Method used

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  • Lithium ion battery adopting ternary composite cathode material and preparation method thereof
  • Lithium ion battery adopting ternary composite cathode material and preparation method thereof

Examples

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Embodiment 1

[0049] A ternary composite negative electrode material lithium ion battery, comprising a battery casing, a pole core and an electrolyte, the pole core and the electrolyte are sealed and accommodated in the battery case, the pole core includes a positive pole, a negative pole and a battery between the positive pole and the negative pole The separator layer is characterized in that: the negative electrode material used in the negative electrode is: titanium oxide, titanium salt or titanium simple substance as a titanium source, lithium salt as a lithium source, starch and expanded graphite as a hard carbon precursor Made, including the lithium battery ternary composite negative electrode material of the following parts by weight components:

[0050] Hard charcoal 50 parts

[0051] Lithium titanate 1.5 parts

[0052] 0.5 parts of expanded graphite.

[0053] Preferably: the lithium salt is lithium carbonate.

Embodiment 2

[0055] A ternary composite negative electrode material lithium ion battery, comprising a battery casing, a pole core and an electrolyte, the pole core and the electrolyte are sealed and accommodated in the battery case, the pole core includes a positive pole, a negative pole and a battery between the positive pole and the negative pole The separator layer is characterized in that: the negative electrode material used in the negative electrode is: titanium oxide, titanium salt or titanium simple substance as a titanium source, lithium salt as a lithium source, starch and expanded graphite as a hard carbon precursor Made, including the lithium battery ternary composite negative electrode material of the following parts by weight components:

[0056] Hard charcoal 98 parts

[0057] Lithium titanate 45 parts

[0058] 5.0 parts of expanded graphite.

[0059] Preferably: the lithium salt is lithium carbonate.

Embodiment 3

[0061] A ternary composite negative electrode material lithium ion battery, comprising a battery casing, a pole core and an electrolyte, the pole core and the electrolyte are sealed and accommodated in the battery case, the pole core includes a positive pole, a negative pole and a battery between the positive pole and the negative pole The separator layer is characterized in that: the negative electrode material used in the negative electrode is: titanium oxide, titanium salt or titanium simple substance as a titanium source, lithium salt as a lithium source, starch and expanded graphite as a hard carbon precursor Made, including the lithium battery ternary composite negative electrode material of the following parts by weight components:

[0062] Hard charcoal 74 parts

[0063] Lithium titanate 23.25 parts

[0064] 2.75 parts of expanded graphite.

[0065] Preferably: the lithium salt is lithium carbonate.

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Abstract

The invention relates to a lithium ion battery adopting a ternary composite cathode material and a preparation method thereof and belongs to the field of lithium ion secondary batteries. The cathode material of the ternary composite cathode material lithium ion battery is prepared from a titanium oxide used as a titanium source, a titanium salt or a titanium simple substance, a lithium salt used as a lithium source, starch used as a hard carbon precursor and expanded graphite and comprises the following components in parts by weight: 50-98 parts of hard carbon, 1.5-45 parts of lithium titanate and 0.5-5.0 parts of expanded graphite. The lithium ion battery adopting the composite cathode material provided by the invention has the advantages of high specific capacity, high primary efficiency, excellent magnification performance and low-temperature performance, low irreversible capacity, good safety and long cycle life, and can fulfill the requirements of novel lithium ion battery pairs.

Description

technical field [0001] The invention relates to a battery and a preparation method thereof. More specifically, the invention relates to a ternary composite negative electrode material lithium ion battery and a preparation method thereof, belonging to the field of lithium ion secondary batteries. Background technique [0002] Lithium-ion secondary batteries (referred to as lithium batteries) have the advantages of high energy density, high working voltage, long cycle life, no pollution, and good safety performance. Based on these advantages, lithium batteries have broad application prospects in many aspects such as portable electronic devices, electric vehicles, large-scale energy storage, space technology, and national defense industry. [0003] The research on lithium battery anode materials has always been one of the key technologies of lithium ion batteries. Generally speaking, lithium battery anode materials are divided into two categories: carbon anode and non-carbon a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M4/131H01M4/1391H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 王瑨谢皎胡蕴成李玉龙廖小东
Owner DONGFANG ELECTRIC CORP LTD
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