Lithium nickel cobalt oxide anode material and preparation method thereof, and lithium ion battery

A technology of nickel-cobalt hydroxide and positive electrode materials, which can be used in battery electrodes, secondary batteries, circuits, etc., and can solve the problems of high cycle stability and reversible capacity

Pending Publication Date: 2020-05-29
EAST CHINA UNIV OF SCI & TECH +1
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the inability to obtain lithium nickel cobalt oxide cathode materials with high cycle stability, high reversible capacity and higher nickel content in the prior art, and provide a lithium nickel cobalt oxide cathode material Material and preparation method thereof, lithium ion battery

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
  • Lithium nickel cobalt oxide anode material and preparation method thereof, and lithium ion battery
  • Lithium nickel cobalt oxide anode material and preparation method thereof, and lithium ion battery
  • Lithium nickel cobalt oxide anode material and preparation method thereof, and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The preparation method of the cathode material of this embodiment is as follows:

[0063] Nickel cobalt hydroxide precursor Ni 0.9 co 0.1 (OH) 2 Preparation: Weigh NiSO according to the molar ratio of Ni:Co=9:1 4 ·6H 2 O solid 116.64 g, CoSO 4 ·7H 2 O solid 15.12g; The two kinds of sulfates were added to 468.24mL deionized water to make a mixed sulfate solution A with a total concentration of 2mol / L; 96g of sodium hydroxide solids were weighed and dissolved in deionized water to form 4mol / L Sodium hydroxide solution B; Weigh 87.77 mL of concentrated ammonia water with a mass fraction of 25-28% and mix it with deionized water to form ammonia solution C of 1.95 mol / L. Add 1600 mL of 0.6 mol / L ammonia solution into the reaction kettle as the bottom liquid, and use water bath heating to keep the reaction kettle at a constant temperature of 50°C, and control the stirring speed at 600r / min. Before the reaction started, argon gas was introduced to ensure that the reacti...

Embodiment 2

[0068] The quality of ammonium molybdate tetrahydrate added in this embodiment is 0.0095g, and the addition amount and concentration of the remaining raw materials, and the parameters of the preparation method are the same as in Example 1. The chemical formula LiNi of the lithium nickel cobalt oxide cathode material obtained in this embodiment 0.895 co 0.1 Mo 0.005 o 2 .

Embodiment 3

[0070] The quality of ammonium molybdate tetrahydrate added in this embodiment is 0.038g, and the addition amount and concentration of the remaining raw materials, and the parameters of the preparation method are the same as in Example 1. The chemical formula LiNi of the lithium nickel cobalt oxide cathode material obtained in this embodiment 0.88 co 0.1 Mo 0.02 o 2 .

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
Concentrationaaaaaaaaaa
Volumeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a lithium nickel cobalt oxide anode material and a preparation method thereof, and a lithium ion battery. A chemical formula of the lithium nickel cobalt oxide anode material is LiNiz-xCo1-zMoxO2, wherein x is greater than 0 and less than or equal to 0.02, and z-x is greater than 0.8 and less than or equal to 0.95. The preparation method of the lithium nickel cobalt oxide anode material comprises the step of sintering a total mixture of nickel cobalt hydroxide, lithium salt and ammonium molybdatetetrahydrate. According to the lithium nickel cobalt oxide anode material disclosed by the invention, nickel with a higher content is added; and meanwhile, a high valence state and high bond energy of molybdenum are combined so that the obtained molybdenum-doped lithium nickel cobalt oxide anode material can remarkably inhibit a H2-H3 phase change, the structure of the anode material is more stable, cycling stability is high, a reversible capacity is high too, a processis simple, and cost is low, and the material and the method can be applied to large-scale industrial production.

Description

technical field [0001] The invention relates to a lithium nickel cobalt oxide cathode material, a preparation method thereof, and a lithium ion battery. Background technique [0002] With the gradual improvement of people's requirements for the cruising range of electric vehicles (≥500Km), high energy density lithium-ion batteries are imminent. However, limited by low energy density and high cost of cathode materials (such as LiCoO 2 , LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ), the current state-of-the-art lithium-ion batteries are still difficult to meet the above demands. Therefore, the development of high-capacity, low-cost, and long-life cathode materials is of great significance for the further development of electric vehicles. [0003] LiNi with high nickel content z co (1-z) o 2 (z>0.8) Cathode materials have high reversible specific capacity (~210mAh g -1 ), low cost, and low toxicity have become the most promising cathode materials for next-generation lithium-ion ...

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): H01M4/485H01M4/525H01M10/0525H01M4/36
CPCH01M4/485H01M4/525H01M10/0525H01M4/362Y02E60/10
Inventor江浩李春忠胡彦杰朱华威余海峰黄君涛
OwnerEAST CHINA UNIV OF SCI & TECH