Spinel nickel manganese-based oxide cathode material and preparation process thereof

A cathode material, a nickel-manganese-based technology, applied in the field of spinel nickel-manganese-based oxide cathode materials and their preparation, can solve the problems of being unsuitable for industrial production, increasing production costs, harsh reaction conditions, etc., and achieving a good high-temperature cycle performance, reduce surface energy, and improve the effect of high temperature cycle performance

Active Publication Date: 2012-09-19
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
View PDF8 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent document with the publication number CN102005563A discloses a method for the preparation and surface coating of a high-voltage positive electrode material for a lithium-ion battery. It uses a gel-sol method to obtain lithium nickel manganese oxide, that is, firstly, the manganese source compound and the nickel source compound are mixed in a solvent. mixed with a surfactant, then dried into a sol after being mixed with a surfactant, then dried into a gel and then calcined to obtain nickel-manganese oxide; then the nickel-manganese oxide was mixed with a lithium source compound for ball milling, dried and heat-treated to obtain nickel Lithium manganate, this method uses organic acid as surfactant, which not only affects the environment, but also increases production costs
The Chinese patent literature with the publication number CN101640266A

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
  • Spinel nickel manganese-based oxide cathode material and preparation process thereof
  • Spinel nickel manganese-based oxide cathode material and preparation process thereof
  • Spinel nickel manganese-based oxide cathode material and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] The present invention also provides a method for preparing a spinel nickel-manganese-based oxide cathode material, comprising the following steps:

[0046] a) Pretreatment after mixing the manganese-containing compound, nickel-containing compound, lithium-containing compound and M-containing compound uniformly, and cooling and grinding to obtain a lithium nickel manganese oxide precursor; the M-containing compound is a Mg-containing compound, an Al-containing compound, a Ti compound, V-containing compound, Cr-containing compound, Mn-containing compound, Fe-containing compound, Co-containing compound, Ni-containing compound, Cu-containing compound, Zr-containing compound, Nb-containing compound, Ag-containing compound, Sn-containing compound, Ce-containing compound , one or more of Nd-containing compounds, Ta-containing compounds, W-containing compounds, Pt-containing compounds and Au-containing compounds;

[0047] b) roasting the lithium nickel manganese oxide precursor...

Embodiment 1～10

[0064] According to the raw materials and dosage shown in Table 1, according to the treatment conditions shown in Table 2, the spinel nickel-manganese-based oxide positive electrode material was prepared according to the following steps:

[0065] Mix the manganese-containing compound, the nickel-containing compound, the lithium-containing compound and the M-containing compound uniformly before pretreatment, cool and grind to obtain a lithium nickel manganese oxide precursor; then roast the obtained lithium nickel manganese oxide precursor, cool and grind to obtain a solid powder; and annealing the obtained solid powder, cooling and grinding to obtain the spinel nickel-manganese-based oxide positive electrode material.

Embodiment 1

[0068] Table 2 The processing conditions for the preparation of spinel nickel-manganese-based oxide positive electrode materials in Examples 1-10 of the present invention

[0069]

[0070] The spinel nickel-manganese-based oxide positive electrode material prepared in each embodiment was analyzed by X-ray diffraction using a polycrystalline diffractometer from Bruker, Germany. The CuKα line was used as the light source, and the diffraction angle 2θ was from 10° to 90°. For the results, see figure 1 , figure 1 The X-ray diffraction pattern of the spinel nickel-manganese-based oxide positive electrode material provided by Example 1 of the present invention is obtained by figure 1 It can be seen that the spinel nickel-manganese-based oxide positive electrode material prepared in Example 1 of the present invention has a standard positive spinel (FD-3M) cubic structure and no impurity phase. The spinel nickel-manganese-based oxide cathode materials prepared in Examples 2-10 all...

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
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention provides a spinel nickel manganese-based oxide cathode material. The composition of the material by atomic ratio is represented as formula (I): LiaMx+yNi0.5-yMn1.5-xO4, (I), wherein, 0.9<=a<=1.1, 0<=x<=0.2, 0<=y<=0.1, M represents one of or a plurality of Mg, Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, Ag, Sn, Ce, Nd, Ta, W, Pt and Au. The invention also provides a preparation process of the spinel nickel manganese oxide cathode material. During the preparation process of the spinel nickel manganese oxide cathode material, a compound containing M is added as a doping element, so that the surface energy of the material is reduced during solid-phase synthesis, nickel elements and manganese elements are distributed evenly, impure phases can be avoided, and the high-temperature cycle performance of the obtained cathode material can be improved.

Description

technical field [0001] The invention belongs to the technical field of positive electrode materials for lithium ion batteries, and in particular relates to a spinel nickel-manganese-based oxide positive electrode material and a preparation method thereof. Background technique [0002] As a reusable secondary battery, lithium-ion batteries have the advantages of good safety, high discharge specific energy, and long charge and discharge life. They have been widely used in digital products, electric tools, and electric bicycles. With the country's emphasis on green energy and people's deepening awareness of the energy crisis, lithium-ion power batteries, as a key component of electric vehicles and hybrid vehicles, have become the focus of attention. [0003] The performance of a lithium ion battery depends critically on the performance of its positive electrode material. The prior art discloses a variety of materials that can be used as the positive electrode of a lithium ion b...

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
CPCY02E60/122Y02E60/10
Inventor 夏永高刘兆平赛喜雅勒图
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap