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Preparing method of anode material of lithium cobalt, nickel, manganese, oxygen lithium ion battery

A lithium nickel manganese cobalt oxide lithium, ion battery technology, applied in electrode manufacturing, battery electrodes, chemical instruments and methods, etc. Improve specific capacity and cycle stability, improve appearance, and facilitate infiltration

Inactive Publication Date: 2009-02-04
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can produce spherical powder materials, but it is necessary to strictly control the flow of alkaline solution and the pH value of the solution to be able to realize the control of the powder material morphology, and the average particle size of the prepared material is usually less than 2 microns (usually 0.5-2 microns), can not meet the actual needs

Method used

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  • Preparing method of anode material of lithium cobalt, nickel, manganese, oxygen lithium ion battery
  • Preparing method of anode material of lithium cobalt, nickel, manganese, oxygen lithium ion battery
  • Preparing method of anode material of lithium cobalt, nickel, manganese, oxygen lithium ion battery

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Experimental program
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Embodiment 1

[0027] This embodiment is used to illustrate that the secondary ball cathode material LiNi provided by the present invention 1 / 3 mn 1 / 3 co 1 / 3 o 2 method of preparation.

[0028] 1 mole of nickel cobalt manganese hydroxide Ni with an average particle size of 0.6 micron 1 / 3 mn 1 / 3 co 1 / 3 (OH) 2 Put it into the intermittent fluidized bed granulator, feed compressed air at 110°C at a speed of 5 m / s, the precursor nickel cobalt manganese hydroxide Ni 1 / 3 mn 1 / 3 co 1 / 3 (OH) 2 Fluidize rapidly in the fluidized bed granulator, simultaneously with spray gun, 500 gram concentrations are sprayed in the fluidized bed granulator with the sodium carboxymethyl cellulose aqueous solution of 1% by weight, and the speed of injection is 5 g / min, Obtain spherical secondary particles; put the obtained secondary particles into a high-temperature furnace at 300°C for one-stage sintering for 4 hours to obtain a one-stage sintered product, and then mix the obtained one-stage sintered produc...

Embodiment 2

[0031] This embodiment is used to illustrate that the secondary ball cathode material LiNi provided by the present invention 2 / 5 mn 2 / 5 co 1 / 5 o 2method of preparation.

[0032] Repeat the steps of Example 1 to prepare positive electrode material LiNi 2 / 5 mn 2 / 5 co 1 / 5 o 2 , the difference is that the nickel manganese cobalt hydroxide used is Ni 2 / 5 mn 2 / 5 co 1 / 5 (OH) 2 .

[0033] For the above LiNi 2 / 5 mn 2 / 5 co 1 / 5 o 2 The powder is analyzed with an IRIS Advantange 1000ICP-AES type plasma emission spectrometer, and the recorded Li, Mn, Ni, and Co contents are respectively 7.22% (7.22% in theory), 22.85% (22.85% in theory), and 24.29% (in theory 22.33%), 12.25% (theoretical 12.25%). Particle size analysis was carried out with a MASTERSIZER laser particle size analyzer, and the measured D 50 = 11.63 microns.

Embodiment 3

[0035] This embodiment is used to illustrate that the secondary ball cathode material LiNi provided by the present invention 2 / 5 mn 2 / 5 co 1 / 5 o 2 method of preparation.

[0036] Take by weighing 1 mole of nickel nitrate, 1 mole of manganese nitrate and 1 mole of cobalt nitrate in the ratio of Ni:Mn:Co=1:1:1 and dissolve them in 750 milliliters of deionized water to form a solution of 4 moles / liter. Slowly add 1500 milliliters of 4 mol / liter NaOH aqueous solution under stirring conditions, control the temperature of the solution to 50°C, stir for 3 hours and then filter to obtain nickel manganese cobalt hydroxide Ni with an average particle size of 0.5 microns. 1 / 3 mn 1 / 3 co 1 / 3 (OH) 2 ; The above-mentioned nickel manganese cobalt hydroxide Ni 1 / 3 mn 1 / 3 co 1 / 3 (OH) 2 Add it to the fluidized bed granulator, feed compressed air at 120°C at a speed of 1 m / s, the precursor nickel cobalt manganese hydroxide Ni 1 / 3 mn 1 / 3 co 1 / 3 (OH) 2 Fluidize rapidly in the fluidize...

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Abstract

The invention relates to a method for preparing the anode material of lithium nickel manganese oxide lithium ion battery, wherein said method comprises that mixing nickel, manganese cobalt hydroxide and adhesive, preparing particles, sintering; mixing sintered product and lithium composite, sintering. The invention can prepare the ball anode material whose diameter is higher than 7 micrometer even when the diameter of forward element is lower than 1 micrometer, to reduce deposit time of forward element. The invention can increase contact area and improve capacity of battery.

Description

technical field [0001] The invention relates to a preparation method of a lithium ion battery positive electrode material, in particular to a preparation method of a spherical lithium nickel manganese cobalt oxygen lithium ion battery positive electrode material. Background technique [0002] Lithium-ion batteries have the advantages of high energy, long life, no memory effect, and low pollution. They are the mainstream products of chemical power sources and are widely used in mobile communication equipment and military fields. Among them, cathode materials occupy the most important position in the composition of lithium-ion battery products, and the research and development of high-performance and low-cost cathode materials has become a hot spot in the field of materials. [0003] At present, the positive electrode material used in commercial lithium-ion batteries is mostly lithium cobaltate, but its low specific capacity and high price have affected the application range o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/58H01M4/48C01D15/00C01G1/02C01G45/00C01G51/00C01G53/00
CPCY02E60/12Y02E60/10
Inventor 肖峰曹文玉
Owner BYD CO LTD
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