Manganese-based compound cathode material of lithium battery and preparation method of material

A negative electrode material, lithium battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of good safety and cycle life, low first-time battery efficiency, low battery cycle life, etc., and achieve good cycle stability. Conducive to the development of capacity, excellent rate performance and safety effects

Active Publication Date: 2013-04-03
DONGFANG ELECTRIC CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problems of low first-time efficiency, low battery cycle life, and potential safety hazards of batteries made of transition metal oxide / graphene nanocomposite electrode materials for lithium batteries in the prior art, and provides a lithium battery manganese Based composite anode material, which has large specific capacity, high initial efficiency, excellent rate performance, low irreversible capacity, good safety and cycle life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A manganese-based composite negative electrode material for a lithium battery, the manganese-based composite negative electrode material for a lithium battery is a 20nm particle, and the manganese-based composite negative electrode material for a lithium battery is a solid Mn 3 o 4 / graphene composite anode material, and Mn made of lithium-containing compound and titanium-containing compound 3 o 4 / graphene / lithium titanate nanocomposite negative electrode material, the mass ratio of described manganese-containing compound and graphene is 2:1, and the atomic ratio of lithium element and titanium element in described lithium-containing compound and titanium-containing compound is 3 :5, the solid Mn 3 o 4 The mass ratio of graphene composite anode material to titanium-containing compound is 10:1.

Embodiment 2

[0044] A manganese-based composite negative electrode material for a lithium battery, the manganese-based composite negative electrode material for a lithium battery is a 200nm particle, and the manganese-based composite negative electrode material for a lithium battery is a solid Mn 3 o 4 / graphene composite anode material, and Mn made of lithium-containing compound and titanium-containing compound 3 o 4 / graphene / lithium titanate nanocomposite negative electrode material, the mass ratio of described manganese-containing compound and graphene is 20:1, and the atomic ratio of lithium element and titanium element in described lithium-containing compound and titanium-containing compound is 5 :5, the solid Mn 3 o 4 The mass ratio of graphene composite anode material to titanium-containing compound is 100:1.

Embodiment 3

[0046] A manganese-based composite negative electrode material for a lithium battery, the manganese-based composite negative electrode material for a lithium battery is a particle of 110nm, and the manganese-based composite negative electrode material for a lithium battery is a solid Mn 3 o 4 / graphene composite anode material, and Mn made of lithium-containing compound and titanium-containing compound 3 o 4 / graphene / lithium titanate nanocomposite negative electrode material, the mass ratio of described manganese-containing compound and graphene is 11:1, and the atomic ratio of lithium element and titanium element in described lithium-containing compound and titanium-containing compound is 4 :5, the solid Mn 3 o 4 The mass ratio of / graphene composite anode material to titanium-containing compound is 55:1.

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Abstract

The invention relates to a manganese-based compound cathode material of a lithium battery and a preparation method of the material, and belongs to the technical field of cathode materials of lithium ion batteries. The manganese-based compound cathode material comprises micro-particles of 20-200 nm and adopts a solid Mn3O4 / graphene compound cathode material prepared by adopting a manganese compound and grapheme, and an Mn3O4 / graphene / lithium titanate nanometer compound cathode material prepared by a lithium compound and a titanium compound. According to the invention, the Mn3O4 / graphene is covered with lithium titanate, so that residual oxygen-containing functional groups in the graphene are isolated from an electrolyzing solution, the initial efficiency of the material is improved, the cycle life of the material is prolonged, and the safety of the battery is enhanced; and the cathode material disclosed by the invention has the advantages of high specific capacity, high initial efficiency, excellent rate performance, low irreversible capacity, good safety and long cycle life, and meets the demands of novel lithium ion battery sets.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode material and a preparation method thereof. More specifically, the invention relates to a lithium battery manganese-based composite negative electrode material and a preparation method thereof, belonging to the technical field of lithium ion battery negative electrode materials. Background technique [0002] At present, in the field of portable digital products, lithium-ion secondary batteries have occupied a dominant position in the market. With the rise of electric vehicles and large-scale energy storage systems, lithium-ion secondary batteries have shown a wide range of application prospects due to their advantages such as high energy density, high working voltage, long cycle life, no pollution, and good safety performance. It has been paid more and more attention by researchers and enterprises. The new market also brings new demands and new challenges. In addition to safety, economy,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/50H01M4/62
CPCY02E60/10
Inventor 王瑨谢皎王增竹吴仕明
Owner DONGFANG ELECTRIC CORP LTD
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