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Positive electrode material with improved nanoscale structure for lithium-ion battery and preparation method of positive electrode material

A technology for lithium-ion batteries and positive electrode materials, applied in battery electrodes, secondary batteries, structural parts, etc., can solve the problems of low gram capacity, reversible capacity fading, easy dissolution of manganese ions, etc., achieve fast reaction speed, save time, The effect of simple process

Active Publication Date: 2016-09-07
ZHEJIANG MEIDARUI NEW MATERIAL TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

The disadvantage is that the gram capacity is low, especially for manganese-based spinel structure materials, manganese ions are easy to dissolve, especially its dissolution at high temperature is an important factor leading to reversible capacity fading

Method used

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  • Positive electrode material with improved nanoscale structure for lithium-ion battery and preparation method of positive electrode material
  • Positive electrode material with improved nanoscale structure for lithium-ion battery and preparation method of positive electrode material
  • Positive electrode material with improved nanoscale structure for lithium-ion battery and preparation method of positive electrode material

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] Please refer to figure 1 , the embodiment of the present invention provides a lithium-ion battery positive electrode material with improved nanoscale structure, which includes particles with two structures alternately arranged, the particles include layered positive electrode active materials and spinel positive electrode active materials, the The layered positive electrode active material and the spinel positive electrode active material are alternately arranged to form the particles, and the layered positiv...

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Abstract

The invention provides a positive electrode material with an improved nanoscale structure for a lithium-ion battery. The positive electrode material comprises two kinds of particles which are alternately arranged in structure, wherein the particles comprise layered positive active materials and spinel positive active materials; the layered positive active materials and the spinel positive active materials are alternately arranged to form the particles; the layered positive active materials comprise xLi<2>MO<3>.(1-x)LiMO<2>, wherein x is smaller than 1 and greater than or equal to 0; the spinel positive active material comprise LiM<2>O<4>; and M is one or more of metallic elements of which the atomic numbers are greater than 6. The invention further provides a preparation method of the positive electrode material with the improved nanoscale structure for the lithium-ion battery.

Description

technical field [0001] The invention relates to a lithium ion battery cathode material with improved nanoscale structure and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high voltage, no memory effect, good cycle and safety performance, and are widely used in portable electrical equipment, electric bicycles and electric vehicles. At the same time, higher requirements are put forward for the electrochemical performance and safety performance of lithium-ion batteries. As one of the important components of lithium-ion batteries, the performance of the cathode material of lithium-ion batteries greatly affects the performance and application of lithium-ion batteries. [0003] At present, the lithium-ion cathode materials that are widely used are mainly layered structure and spinel structure. Structures such as lithium manganese oxide and lithium nickel manganese oxide. Both structures have their o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 刘冬梅韩珽
Owner ZHEJIANG MEIDARUI NEW MATERIAL TECH CO LTD
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