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Modified anode material, manufacturing method and application thereof

A cathode material and modification technology, which is applied in the field of modified cathode materials and its preparation, can solve the problems of material capacity reduction, uneven surface coverage, unfavorable material application, etc., and achieve easy availability of raw materials, surface stability and storage stability Improvement of cycle performance and high-temperature storage capacity retention

Active Publication Date: 2020-01-10
JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating process is prone to the problem of uneven surface coverage. If the coating amount is increased, the capacity of the material will decrease, which is not conducive to the practical application of the material.

Method used

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  • Modified anode material, manufacturing method and application thereof
  • Modified anode material, manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The cathode material used in this embodiment is LiNi 0.6 co 0.2 mn 0.2 o 2 ;

[0051] The preparation method of modified cathode material:

[0052] (1) modifying agent is uniformly mixed with high-nickel positive electrode material in high mixer, obtains compound, described modifying agent is lithium citrate, and the mass ratio of described modifying agent and high-nickel positive electrode material is 5: 95;

[0053] (2) heat-treat the mixture obtained in step (1) at 250° C. for 5 hours in an air atmosphere, and the flow rate of the oxygen atmosphere is 0.4 m 3 / h / kg, and then cooled to obtain the modified positive electrode material.

Embodiment 2

[0055] The difference between this embodiment and embodiment 1 is that lithium citrate is replaced by lithium acetate of equal mass, and other conditions are completely the same as in embodiment 1.

Embodiment 3

[0057] The difference between this embodiment and embodiment 1 is that lithium citrate is replaced by lithium oxalate of equal mass, and other conditions are completely the same as in embodiment 1.

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Abstract

The invention relates to a modified anode material, a manufacturing method and an application thereof. The method comprises the following steps of taking a mixture of an organic acid lithium salt and / or an inorganic acid lithium salt and an organic reducing agent as a modifier; mixing with a high-nickel anode material; and then carrying out heat treatment to obtain a modified anode material. By using the method of the invention, contents of Ni <2+> and Mn<4+> on a surface of the modified anode material can be obviously improved so that the surface of the obtained modified anode material has higher stability, and cycle performance of a manufactured lithium ion battery and a high-temperature storage capacity retention rate are remarkably improved.

Description

technical field [0001] The invention belongs to the field of battery materials, and in particular relates to a modified positive electrode material and its preparation method and application. Background technique [0002] Due to its high energy density, high voltage and environmental friendliness, lithium-ion batteries are widely used in portable power devices (such as mobile phones, computers) and electric vehicles. However, due to the influence of battery materials, conductive additives, and binders, it is currently difficult to prepare lithium-ion batteries with high reversible capacity, high cycle stability, and high rate performance. [0003] Compared with traditional ternary cathode materials, high-nickel ternary cathode materials have higher energy density and lower raw material costs, which are the key factors for realizing high specific energy lithium-ion secondary batteries. However, the increase of nickel content in the material has brought about many stability p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/364H01M4/505H01M4/525H01M4/62H01M10/0525H01M2004/028Y02E60/10
Inventor 姚毅钟志勇赵会文张业琼江柯成
Owner JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
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