Unlock instant, AI-driven research and patent intelligence for your innovation.

Modified nickel-manganese lithium ion battery cathode material and preparation method thereof

A technology for ion batteries and positive electrode materials, which is applied in the direction of battery electrodes, circuits, electrical components, etc., and can solve problems such as affecting charge and discharge performance, decline in charge and discharge performance, and reduction in capacitance

Inactive Publication Date: 2018-12-14
WUHU QIANKAI MATERIAL TECH CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after repeated use of conventional lithium-ion batteries, their capacity will be significantly reduced, resulting in a significant decline in their charge and discharge performance.
The positive plate of lithium ion electrons will greatly affect its charge and discharge performance, etc.

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The invention provides a method for preparing a positive electrode material of a modified nickel-manganese lithium ion battery. The preparation method comprises the following steps: (1) dissolving divalent nickel source, divalent manganese source and citric acid in water, and continuously mixing Heating reaction under conditions, after cooling, adding lithium source compound for mixing, and then calcining; wherein, the molar ratio of divalent nickel source, divalent manganese source and lithium source compound is 0.65-0.75:0.25-0.35:1; (2 ) ultrasonically disperse the calcined product in absolute ethanol containing thioacetamide, and then heat the reaction.

[0014] Through the above technical scheme, the charge-discharge performance and cycle performance of the modified nickel-manganese lithium-ion battery cathode material obtained in the present invention are greatly improved. Compared with the existing nickel-manganese lithium-ion battery cathode material, the modifie...

Embodiment 1

[0038]A method for preparing a positive electrode material of a modified nickel-manganese lithium ion battery, the preparation method comprising the following steps:

[0039] (1) Dissolve nickel nitrate, manganese nitrate and citric acid in water, the concentration of divalent nickel ions is 0.03mol / L, heat and react at 80°C for 8 hours under continuous mixing conditions, after cooling, add lithium nitrate for mixing, and then Calcined at 300°C for 4h;

[0040] Wherein, the molar ratio of nickel nitrate, manganese nitrate and lithium nitrate is 0.75:0.25:1, and the consumption of citric acid is 0.08 mol relative to 1 mol of nickel nitrate;

[0041] (2) Ultrasonic disperse the calcined product in absolute ethanol containing thioacetamide for 15 minutes, and then heat the reaction at 120°C for 14 hours, wherein, relative to 8 g of the calcined product, thioacetamide The amount of amide added was 0.15 mol, and the amount of absolute ethanol was 50 mL.

Embodiment 2

[0043] A method for preparing a positive electrode material of a modified nickel-manganese lithium ion battery, the preparation method comprising the following steps:

[0044] (1) Dissolve nickel nitrate, manganese nitrate and citric acid in water, the concentration of divalent nickel ions is 0.06mol / L, heat and react at 95°C for 3 hours under continuous mixing conditions, after cooling, add lithium nitrate for mixing, and then Calcined at 600°C for 1h;

[0045] Wherein, the molar ratio of nickel nitrate, manganese nitrate and lithium nitrate is 0.75:0.25:1, relative to 1 mol of nickel nitrate, the consumption of citric acid is 0.1 mol;

[0046] (2) Ultrasonic disperse the calcined product in absolute ethanol containing thioacetamide for 5 minutes, and then heat the reaction at 190°C for 10 hours, wherein, relative to 8 g of the calcined product, thioacetamide The amount of amide added was 0.3 mol, and the amount of absolute ethanol was 150 mL.

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

No PUM Login to View More

Abstract

The invention provides a preparation method of a modified nickel-manganese lithium ion battery cathode material. The preparation method comprises the following steps: (1) dissolving a divalent nickelsource, a divalent manganese source and citric acid in water, heating and reacting under a continuous mixing condition, after cooling, adding a lithium source compound for mixing, and then calcining;The molar ratio of the divalent nickel source, divalent manganese source and lithium source compound is 0.65-0.75:0.25-0.35:1; (2) ultrasonically dispersing the calcined product in absolute ethanol containing thioacetamide, and then performing a heating reaction. The modified nickel-manganese lithium ion battery cathode material obtained by the invention has the charge-discharge performance and the recycling performance greatly improved, and the modified nickel manganese lithium ion battery cathode material has better charge-discharge performance compared with an existing nickel-manganese lithium ion battery cathode material.

Description

technical field [0001] The invention relates to a positive electrode material of a lithium ion battery, in particular to a modified nickel manganese lithium ion battery positive electrode material and a preparation method thereof. Background technique [0002] With the continuous advancement of science and technology and the continuous improvement of people's living standards, the demand for energy is also increasing, and lithium-ion batteries, as an energy storage device with excellent performance, are widely used in portable devices, computers and telecommunications has a wide range of applications. However, after repeated use of conventional lithium-ion batteries, their capacity will be significantly reduced, resulting in a significant decline in their charge and discharge performance. The positive plate of lithium ion electrons will greatly affect its charge and discharge performance. [0003] Therefore, it is an urgent problem to be solved in the present invention to ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525Y02E60/10
Inventor 李千林张强周建平
Owner WUHU QIANKAI MATERIAL TECH CO LTD