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

A high-nickel positive electrode material for high-temperature long-cycle lithium ion battery and preparation method thereof

A technology for lithium-ion batteries and positive electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., to achieve high reproducibility, avoid safety problems, and have a wide range of raw material sources

Active Publication Date: 2018-07-10
广东容钠新能源科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few related studies on reducing the generation of lithium residues on the surface of materials and reducing the occurrence of side reactions, and there is no good solution. Conventional metal oxides, phosphates, and fluorides will not interact with lithium during the coating process. Residue reaction, the lithium residue will still promote the decomposition of the electrolyte during the cycle of the material

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
  • A high-nickel positive electrode material for high-temperature long-cycle lithium ion battery and preparation method thereof
  • A high-nickel positive electrode material for high-temperature long-cycle lithium ion battery and preparation method thereof
  • A high-nickel positive electrode material for high-temperature long-cycle lithium ion battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A high-nickel positive electrode material for a high-temperature long-cycle lithium-ion battery and a preparation method thereof are provided. The chemical formula of the high-nickel positive electrode material for a high-temperature long-cycle lithium-ion battery is Li 1+z Ni 1-x-y co x Al y Nb z o 2 ·wNb 2 o 5 , where x, y, z, and w are moles, 02 o 5 It is the coating layer active oxide of high-nickel cathode material for high-temperature and long-cycle lithium-ion batteries.

[0036] The high-nickel positive electrode material for high-temperature long-cycle lithium-ion batteries is prepared through the following steps:

[0037] (1) In terms of molar ratio, nickel sulfate, cobalt sulfate, and aluminum sulfate solutions are mixed according to the ratio of Ni:Co:Al (1-x-y): x:y, and then added to the reaction kettle, using sodium hydroxide as a precipitant , adjust the pH value of the mixed solution with ammonia water to 9-12, carry out co-precipitation reactio...

Embodiment 2

[0043] A method for preparing a high-nickel positive electrode material for a high-temperature long-cycle lithium-ion battery is provided, which is prepared through the following steps,

[0044] (1) In terms of molar ratio, nickel sulfate, cobalt sulfate, and aluminum sulfate solutions are mixed according to the ratio of Ni:Co:Al (1-x-y): x:y, and then added to the reaction kettle, using sodium hydroxide as a precipitant , adjust the pH value of the mixed solution with ammonia water to 9-12, carry out co-precipitation reaction, and obtain the precursor (Ni 1-x-y co x Al y )(OH) 2 ;

[0045] (2) Lithium hydroxide, precursor materials and the first niobium source are weighed according to the molar ratio Li:(Ni+Co+Al):Nb=(1+z):1:z, wherein 1<(1+ z) ≤ 1.05, then put the material into the mixing tank, after mixing for 6-24 hours, dry the mixture and press into tablets to prepare for calcination;

[0046] The calcination process is: put the dried and pressed mixture into a tube...

Embodiment 3

[0053] A method for preparing a high-nickel anode material for a high-temperature long-cycle lithium-ion battery of the present invention is described in conjunction with a specific example, which is specifically prepared through the following steps.

[0054] (1) In terms of molar ratio, mix nickel sulfate, cobalt sulfate, and aluminum sulfate solutions according to the ratio of Ni:Co:Al of 0.8: 0.15: 0.05, then add them to the reaction kettle, use sodium hydroxide as a precipitant, and adjust with ammonia water The pH value of mixed solution is 11, carries out co-precipitation reaction, can obtain precursor (Ni 0.8 co0.15 Al 0.05 )(OH) 2 , after SEM detection, the shape is spherical, the particle size is about 12-16 microns; the tap density is 1.89g / cm 3 about.

[0055] (2) Weigh 0.101mol lithium hydroxide, 0.1mol precursor (Ni 0.8 co 0.15 Al 0.05 )(OH) 2 and 0.001mol niobium oxalate, put the material into a mixing tank, the mixing time is 8h, and prepare for calcining...

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 diameteraaaaaaaaaa
densityaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a high-temperature and long-cycle high-nickel positive electrode material for a lithium-ion battery and a preparation method of the high-temperature and long-cycle high-nickel positive electrode material. A chemical formula of the positive electrode material is Li<1+z>Ni<1-x-y>Co<x>Al<y>Nb<z>O<2>.wNb<2>O<5>, wherein x, y, z and w are mole numbers, x is smaller than or equal to 0.2 and greater than or equal to 0, y is smaller than or equal to 0.1 and greater than or equal to 0, x+y is smaller than or equal to 0.2 and greater than or equal to 0, z is smaller than or equal to 0.05 and greater than or equal to 0, w is smaller than or equal to 0.02 and greater than 0, z+w is smaller than or equal to 0.06 and greater than 0, Nb is a doping element, and Nb<2>O<5> is a coated active oxide of the high-temperature and long-cycle high-nickel positive electrode material for the lithium-ion battery. The positive electrode material is prepared through three steps, so that the rate capability and the cycle performance of the high-nickel positive electrode material for the lithium-ion battery can be greatly improved, the high-nickel positive electrode material especially has excellent electrochemical properties and security performance under the conditions of a high temperature, a long cycle and a high rate; the preparation method is simple, low in cost and easy to operate; the performance in all aspects of the high-nickel positive electrode material can be greatly improved; and the high-nickel positive electrode material has great commercial potential.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery cathode materials, in particular to a high-nickel cathode material for a high-temperature long-cycle lithium-ion battery and a preparation method thereof. Background technique [0002] Today, the commercialized lithium cobalt oxide (LiCoO 2 ) Due to the high price of cobalt, poor safety, low energy density and other shortcomings, it is difficult to apply it on a large scale in the fields of high-power devices and power battery equipment. Many researchers have turned their attention to the ternary cathode material Li(Ni x co y mn z )O 2 , x+y+z=1, it will be used as the next-generation mainstream lithium-ion battery cathode material. However, the nickel-based material LiNi, which also has a layered structure x co y Al 1-x-y o 2 (wherein, a and b are the number of moles, 0.8≤x≤1, 0≤y≤0.2 and 0.9≤x+y≤1), its actual reversible capacity is up to 200mAh / g, which is widely used in h...

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 Patents(China)
IPC IPC(8): H01M4/36H01M4/525H01M4/485H01M4/62H01M10/0525
CPCH01M4/366H01M4/485H01M4/525H01M4/62H01M10/0525H01M2004/021Y02E60/10
Inventor 杨成浩欧星熊训辉
Owner 广东容钠新能源科技有限公司