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Ternary composite cathode material of lithium battery and preparation method of ternary composite cathode material

A ternary composite, negative electrode material technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of low capacity, low irreversible capacity, and low initial efficiency of lithium titanate materials, and achieve safety and good cycle life. The effect of low irreversible capacity and high first efficiency

Active Publication Date: 2015-06-03
DONGFANG ELECTRIC CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims to solve the problems of low efficiency of hard carbon materials in the prior art, easy lithium precipitation, low capacity and low conductivity of lithium titanate materials, and provides a ternary negative electrode material for lithium batteries, which has a large specific capacity , high efficiency for the first time, excellent rate performance and low temperature performance, low irreversible capacity, good safety and cycle life, which meet the needs of new lithium-ion batteries

Method used

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  • Ternary composite cathode material of lithium battery and preparation method of ternary composite cathode material
  • Ternary composite cathode material of lithium battery and preparation method of ternary composite cathode material

Examples

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Embodiment 1

[0048] A lithium battery ternary composite negative electrode material, characterized in that: the lithium battery ternary composite negative electrode material is: titanium oxide, titanium salt or titanium element as a titanium source, lithium salt as a lithium source, The starch of the hard carbon precursor and the expanded graphite are made, including the lithium battery ternary composite negative electrode material of the following parts by weight:

[0049] Hard charcoal 50 parts

[0050] Lithium titanate 1.5 parts

[0051] 0.5 parts of expanded graphite.

[0052] Preferably: the lithium salt is lithium carbonate.

Embodiment 2

[0054] A lithium battery ternary composite negative electrode material, characterized in that: the lithium battery ternary composite negative electrode material is: titanium oxide, titanium salt or titanium element as a titanium source, lithium salt as a lithium source, The starch of the hard carbon precursor and the expanded graphite are made, including the lithium battery ternary composite negative electrode material of the following parts by weight:

[0055] Hard charcoal 98 parts

[0056] Lithium titanate 45 parts

[0057] 5 parts of expanded graphite.

[0058] Preferably: the lithium salt is lithium carbonate.

Embodiment 3

[0060] A lithium battery ternary composite negative electrode material, characterized in that: the lithium battery ternary composite negative electrode material is: titanium oxide, titanium salt or titanium element as a titanium source, lithium salt as a lithium source, The starch of the hard carbon precursor and the expanded graphite are made, including the lithium battery ternary composite negative electrode material of the following parts by weight:

[0061] Hard charcoal 74 parts

[0062] Lithium titanate 23.25 parts

[0063] 2.75 parts of expanded graphite.

[0064] Preferably: the lithium salt is lithium carbonate.

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Abstract

The invention relates to a ternary composite cathode material of a lithium battery and a preparation method of the ternary composite cathode material, and belongs to the technical field of cathode materials of lithium batteries. The ternary composite cathode material of the lithium battery, provided by the invention, is prepared from the titanium oxides, titanium salts or titanium elementary substances used as a titanium source, lithium salts used as a lithium source, starch used as a precursor of hard carbon and expanded graphite; and the ternary composite cathode material of the lithium battery 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 parts of expanded graphite. The composite cathode material disclosed by the invention has the advantages of large specific capacity, high first efficiency, favorable multiplying power and low-temperature performances, low irreversible capacity, high safety and long circulating life and meets the requirement of a novel lithium ion battery pair.

Description

technical field [0001] The invention relates to a lithium battery negative electrode material and a preparation method thereof. More specifically, the invention relates to a lithium battery ternary composite negative electrode material and a preparation method thereof, belonging to the technical field of lithium battery negative electrode materials. 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 div...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/587
CPCY02E60/10
Inventor 王瑨谢皎王增竹郑威胡蕴成
Owner DONGFANG ELECTRIC CORP LTD
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