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Copper lithium nickelate positive electrode material and preparation method thereof and lithium ion battery

A technology of lithium cupronickel oxide and positive electrode materials, which is applied in battery electrodes, secondary batteries, circuits, etc., and can solve the problem of unsatisfactory electrochemical performance of lithium-ion batteries, poor electrochemical performance such as reversible capacity, and large particle size of positive electrode materials. problem, to achieve the effect of stable cycle performance, good crystallinity and small size

Inactive Publication Date: 2018-09-07
SHENZHEN UTILITY POWER SOURCE CO LTD
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Problems solved by technology

To solve the problem of Li prepared by existing solid-state sintering method 2 CuO 2 or doped Li 2 CuO 2 Poor electrochemical properties such as large particle size and reversible capacity of positive electrode materials, and technical problems that require high temperature for preparation
[0007] Another object of the present invention is to provide a lithium-ion battery to solve the problem of existing Li-ion battery 2 CuO 2 or doped Li 2 CuO 2 Technical problems of unsatisfactory electrochemical performance of lithium-ion batteries with positive electrode materials

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  • Copper lithium nickelate positive electrode material and preparation method thereof and lithium ion battery
  • Copper lithium nickelate positive electrode material and preparation method thereof and lithium ion battery
  • Copper lithium nickelate positive electrode material and preparation method thereof and lithium ion battery

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preparation example Construction

[0026] On the other hand, the embodiment of the present invention provides a preparation method of the above-mentioned lithium cupronickel oxide positive electrode material. The preparation method technological process of described lithium copper nickelate cathode material is as follows figure 1 As shown, it includes the following steps:

[0027] S01: According to Li 2 Cu 0.5 Ni 0.5 o 2 The stoichiometric ratio obtains lithium source, copper source and nickel source respectively;

[0028] S02. Prepare a mixture slurry containing lithium source, copper source and nickel source: add the lithium source, copper source and nickel source into a solvent, and perform ball milling to obtain a mixture slurry;

[0029] S03. Spray-drying the mixture slurry: performing spray-drying treatment on the mixture slurry to obtain lithium copper nickelate precursor powder;

[0030] S04: Sintering the precursor powder in a protective atmosphere.

[0031] Wherein, described Li in above-mentio...

Embodiment 1

[0046] This embodiment provides a Li 2 Cu 0.5 Ni 0.5 o 2 Lithium cupronickel oxide positive electrode material and preparation method thereof. The crystal grain morphology of the lithium cuproniclate positive electrode material in this embodiment is a rod-like structure.

[0047] Its preparation method comprises the following steps:

[0048] (1) 90 parts of lithium hydroxide are added into 400 parts of deionized water for ultrasonic dissolution to obtain a clear solution of lithium hydroxide;

[0049] (2) Add the solution of step (1) into a ball mill for ball milling, then add 40 parts of copper oxide, 37.5 parts of nickel oxide and 100 parts of deionized water for ball milling, and control the solid content of the slurry to 25%;

[0050] (3) Stir the slurry in step (2) evenly and then spray-dry at 170°C, feed rate 13ml / min, needle pass frequency 10 times / min, and obtain spherical precursor powder;

[0051] (4) After calcining the precursor powder obtained in step (3) in...

Embodiment 2

[0055] This embodiment provides a Li 2 Cu 0.5 Ni 0.5 o 2 Lithium cupronickel oxide positive electrode material and preparation method thereof. The crystal grain morphology of the lithium cuproniclate positive electrode material in this embodiment is a rod-like structure.

[0056] Its preparation method comprises the following steps:

[0057] (1) 90 parts of lithium hydroxide are added into 400 parts of deionized water for ultrasonic dissolution to obtain a clear solution of lithium hydroxide;

[0058] (2) Add the solution of step (1) into a ball mill for ball milling, then add 40 parts of copper oxide, 37.5 parts of nickel oxide and 100 parts of deionized water for ball milling, and control the solid content of the slurry to 25%;

[0059] (3) Stir the slurry in step (2) evenly and then spray-dry at 170°C, feed rate 10ml / min, needle pass frequency 8 times / min, and obtain spherical precursor powder;

[0060] (4) After calcining the precursor powder obtained in step (3) in ...

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Abstract

The invention discloses a copper lithium nickelate positive electrode material and a preparation method thereof and a lithium ion battery containing the copper lithium nickelate positive electrode material. The copper lithium nickelate positive electrode material has a molecular formula of Li2Cu0.5Ni0.5O2, and the crystal morphology is a rod-like structure. The preparation method comprises the steps of: obtaining a lithium source, a copper source and a nickel source according to a stoichiometric ratio of Li2Cu0.5Ni0.5O2, preparing mixed slurry containing the lithium source, the copper source and the nickel source, spray-drying the mixed slurry and sintering precursor powder. The copper lithium nickelate positive electrode material has high crystallinity, forms rod-like crystal grains, andhas small size, uniformity and good electrochemical performance. The lithium ion battery has high electrical specific capacity and stable cycle performance.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a lithium copper nickelate positive electrode material, a preparation method thereof, and a lithium ion battery. Background technique [0002] Lithium-ion battery is a rechargeable battery. It has the advantages of high volume specific energy and mass specific energy, can be charged and discharged cyclically, and is environmentally friendly and pollution-free. . The first commercialization of lithium-ion batteries was realized by Sony Corporation of Japan in 1991. Since then, lithium-ion batteries have been widely used in a short period of time, such as mobile phone batteries, laptop power supplies, and digital cameras. The development of electric vehicles and hybrid vehicles, and the development of lithium-ion batteries have been pushed to another climax. The country also strongly supports the development of new energy. The introduction of various subs...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/525H01M10/0525
CPCH01M4/362H01M4/485H01M4/525H01M10/0525Y02E60/10
Inventor 王继生孟亚斌钟国兵
Owner SHENZHEN UTILITY POWER SOURCE CO LTD
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