Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Anode material for lithium ion battery

A lithium-ion battery, cathode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of large irreversible capacity loss, no good solution, unstable structure, etc., and achieve excellent electrochemical performance and lattice parameters. The effect of small change and stable structure

Active Publication Date: 2013-12-18
HUNAN LIFANG NEW ENERGY SCI & TECH
View PDF6 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is generally believed that LiNi x mn 1-x o 2 In , the value of x should not be greater than 0.5, otherwise the structure will be unstable due to the mixing of Li and Ni in the lattice, resulting in a large irreversible capacity loss and poor cycle performance.
Moreover, in the prior art, no good method has been proposed for the synthesis of lithium nickel manganese oxide with x greater than 0.5

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anode material for lithium ion battery
  • Anode material for lithium ion battery
  • Anode material for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The present embodiment provides lithium ion battery cathode material, and it has layered structure, and its expression is Li 1.02 Ni 0.6 mn 0.35 Al 0.05 o 2 , Li 1.02 Ni 0.6 mn 0.35 Al 0.05 o 2 The surface is also coated with Al 2 o 3 , Al 2 o 3 Accounting for 1wt% of the total mass of the positive electrode material.

[0030] The preparation method of the cathode material comprises the following steps:

[0031] The first step, select nickel sulfate as nickel salt, manganese sulfate as manganese salt, fully dissolve nickel sulfate and manganese sulfate into deionized water and mix evenly, make the molar ratio of nickel to manganese be 60:35, add ammonium hydroxide to make nickel sulfate Precipitating with manganese sulfate to obtain a precipitate, separating the precipitate, drying and calcining to obtain a manganese-nickel precursor salt.

[0032] In the second step, the nickel-manganese precursor salt is mixed with lithium hydroxide and aluminum acetate ...

Embodiment 2

[0036] The present embodiment provides lithium ion battery cathode material, and it has layered structure, and its expression is Li 1.03 Ni 0.7 mn 0.26 Mg 0.04 o 2 , Li 1.03 Ni 0.7 mn 0.26 Mg 0.04 o 2 The surface of is also coated with MgO, and MgO accounts for 2wt% of the total mass of the positive electrode material.

[0037] The preparation method of the cathode material comprises the following steps:

[0038] The first step, select nickel nitrate as nickel salt, manganese nitrate as manganese salt, fully dissolve nickel nitrate and nickel nitrate into deionized water and mix evenly, make the molar ratio of nickel to manganese be 70:26, add lithium hydroxide to make nickel nitrate Precipitating with nickel nitrate to obtain a precipitate, separating the precipitate, drying and calcining to obtain a manganese-nickel precursor salt.

[0039] In the second step, the nickel-manganese precursor salt is mixed with lithium carbonate and magnesium sulfate by ball milling,...

Embodiment 3

[0042] The present embodiment provides lithium ion battery cathode material, and it has layered structure, and its expression is Li 1.05 Ni 0.55 mn 0.45 o 2 , Li 1.05 Ni 0.55 mn 0.45 o 2 The surface of is also coated with LiF, and LiF accounts for 3wt% of the total mass of the cathode material.

[0043] The preparation method of the cathode material comprises the following steps:

[0044] The first step is to select nickel oxalate as nickel salt and manganese oxalate as manganese salt, fully dissolve nickel oxalate and nickel oxalate into ammonia water and mix evenly so that the molar ratio of nickel to manganese is 55:45, and add lithium carbonate to make nickel oxalate and oxalic acid Nickel is precipitated to obtain a precipitate, which is separated, dried and calcined to obtain a manganese-nickel precursor salt.

[0045] In the second step, the nickel-manganese precursor salt and lithium carbonate are mixed by a ball milling method and then calcined at 1200° C. for...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to an anode material for a lithium ion battery. The anode material is in a laminated structure, and the expression of the anode material is Li1+zNixMnyA1-x-yO2; the anode material further comprises a metal oxide or a metal fluoride coated on the surface of the Li1+zNixMnyA1-x-yO2. Compared with the prior art, according to the Li1+zNixMnyA1-x-yO2 provided by the invention, although x is greater than 0.5, and an appropriate synthetic process is adopted, the structure thereof is extremely stable, and the cycle performance of the anode material for the lithium ion battery containing the anode material is good; moreover, the content of Ni is high, thus the specific capacity of the anode material disclosed by the invention is higher and achieves more than 130 mAh / g; moreover, the material is in the laminated structure, so that the multiplying performance is good, and the lithium ion battery can be quickly charged or discharged.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a lithium ion battery cathode material with good structural stability and high specific capacity. Background technique [0002] Lithium-ion batteries have become one of the most widely used secondary batteries due to their advantages such as high energy density, good cycle performance, high operating voltage, and no memory effect. With the rapid development of electronic technology, people put forward higher energy density and longer cycle performance requirements for lithium-ion batteries. Therefore, the development of high-performance cathode materials is particularly important for the development of lithium-ion batteries. [0003] Among the currently commercialized cathode materials for lithium-ion batteries, the most widely used and mature cathode material is lithium cobalt oxide (LiCoO 2 ). Although LiCoO 2 The theoretical gram capacity is 275mAh / g, but its...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/10
Inventor 刘志航赵孝连
Owner HUNAN LIFANG NEW ENERGY SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com