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Positive electrode material of high-capacity lithium ion battery and preparation method of positive electrode material

A technology for lithium-ion batteries and positive electrode materials, applied in battery electrodes, batteries, secondary batteries, etc., can solve problems such as poor chemical cycle performance, poor safety performance, and poor thermal stability, and achieve uniform product particle size distribution and low manufacturing cost. Effects of low temperature, thermal stability and safety improvement

Inactive Publication Date: 2016-04-20
SICHUAN FUHUA NEW ENERGY HIGH TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of high-capacity lithium-ion battery positive electrode material and preparation method thereof, aim at solving existing lithium-ion battery lithium nickelate (LiNiO 2 ) Poor electrochemical cycle performance, poor thermal stability, and poor safety performance of positive electrode materials

Method used

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  • Positive electrode material of high-capacity lithium ion battery and preparation method of positive electrode material
  • Positive electrode material of high-capacity lithium ion battery and preparation method of positive electrode material
  • Positive electrode material of high-capacity lithium ion battery and preparation method of positive electrode material

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preparation example Construction

[0041] Such as figure 1 As shown, the preparation method of the high-capacity lithium-ion battery positive electrode material of the embodiment of the present invention comprises the following steps:

[0042] S101: Add 50% NiSO 4 ·6H 2 O, 70% CoSO 4 ·7H 2 O and 90%Al(NO 3 ) 3 9H 2 O was dissolved in deionized water to obtain solution A;

[0043] S102: Add 50% NiSO 4 ·6H 2 O, 30% CoSO 4 ·7H 2 O and 10%Al(NO 3 ) 3 9H 2 O was dissolved in deionized water to obtain solution B with the same volume as solution A;

[0044] S103: Add solution A to solution B at a speed V of 10ml / min, stir vigorously to make it evenly mixed;

[0045] S104: At the same time, flow the mixed solution B into the container C at twice the flow rate of the solution A, and exhaust the liquid A and the liquid B at the same time;

[0046] S105: Simultaneously add ammonia water and 4mol / L NaOH solution to container C of the mixed solution obtained in step S104, adjust the pH value to 11.0, the rea...

Embodiment 1

[0054] Dissolve 4.0 mol of nickel sulfate, 1.05 mol of cobalt sulfate, and 0.45 mol of aluminum nitrate in 1000 mL of deionized water to completely dissolve to obtain mixed salt solution A;

[0055] Then dissolve 4.0 mol of nickel sulfate, 0.45 mol of cobalt sulfate, and 0.05 mol of aluminum nitrate in 1000 mL of deionized water to completely dissolve it to prepare mixed salt solution B;

[0056] A certain amount of sodium hydroxide was dissolved in the CO removed 2 in deionized water to obtain 4mol / L sodium hydroxide solution, and then dissolve an appropriate amount of concentrated ammonia water in the sodium hydroxide solution to obtain a mixed solution of sodium hydroxide and ammonia water for subsequent use.

[0057]When the mixed salt solution A is added to the mixed salt solution B at a speed of 10ml / min, the mixed salt solution B is added to the container C at a speed of 20ml / min, and the mixed solution of sodium hydroxide and ammonia water is added at a certain rate. ...

Embodiment 2

[0060] Dissolve 3.75 mol of nickel sulfate, 1.4 mol of cobalt sulfate, and 0.45 mol of aluminum nitrate in 1000 mL of deionized water to completely dissolve to obtain mixed salt solution A;

[0061] Then dissolve 3.75 mol of nickel sulfate, 0.60 mol of cobalt sulfate, and 0.05 mol of aluminum nitrate in 1000 mL of deionized water to completely dissolve it to prepare mixed salt solution B;

[0062] A certain amount of sodium hydroxide was dissolved in the CO removed 2 in deionized water to obtain 4mol / L sodium hydroxide solution, and then dissolve an appropriate amount of concentrated ammonia water in the sodium hydroxide solution to obtain a mixed solution of sodium hydroxide and ammonia water for subsequent use.

[0063] When the mixed salt solution A is added to the mixed salt solution B at a speed of 10ml / min, the mixed salt solution B is added to the container C at a speed of 20ml / min, and the mixed solution of sodium hydroxide and ammonia water is added at a certain rate....

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Abstract

The invention discloses a positive electrode material of a high-capacity lithium ion battery and a preparation method of the positive electrode material. The preparation method comprises the following steps: dissolving raw materials into de-ionized water to prepare a mixed solution A and a mixed solution B, which have the same volume and different concentrations; adding a sodium hydroxide solution and an ammonia water solution into a container C in a parallel flow manner to be subjected to co-precipitation, so as to prepare a co-precipitate Ni1-x-yCoxAly(OH)2+y precursor; after ageing, filtering, washing and drying the prepared co-precipitate precursor, uniformly mixing the co-precipitate precursor with a lithium source; pressing and molding mixed materials, putting the mixture into a pipe furnace for presintering, and sintering the mixture in an oxygen / oxygen-enriching air airflow to obtain a target product. The positive electrode material of the lithium ion battery, provided by the invention, has no impure phases and has high crystallization quality; the product has a uniformly-distributed grain diameter and a regular spherical shape, and has a very high specific discharge capacity and relatively excellent circulating stability; the positive electrode material can meet high-energy density and high-power charging and discharging requirements, a process is simple and a manufacturing cost is relatively low.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a high-capacity lithium-ion battery cathode material and a preparation method thereof. Background technique [0002] With the deteriorating global environment and the depletion of fossil resources such as oil and natural gas, the research and development of energy conservation and emission reduction and green energy are imminent. Both at home and abroad attach great importance to the development and application of new energy and renewable clean energy. Lithium-ion battery is one of the promising new green energy sources. Because lithium-ion batteries have high specific capacity, high working voltage, high energy density, fast charging, low self-discharge rate, long-term storage, long cycle life, good safety performance, no memory effect, wide operating temperature range, and lightweight and other advantages, lithium-ion batteries have been widely used i...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/525H01M10/0525
CPCH01M4/366H01M4/525H01M10/0525H01M2220/20Y02E60/10
Inventor 刘兴泉刘一町何振华
Owner SICHUAN FUHUA NEW ENERGY HIGH TECH CO LTD
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