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Preparing method of nickel cobalt lithium manganate ternary positive electrode material

A positive electrode material, nickel-cobalt-manganese technology, applied in the field of energy materials, can solve problems such as poor fluidity, low bulk density, and difficult control of material morphology, and achieve the effects of improving bulk density and cycle performance, improving performance, and improving physical and chemical properties

Inactive Publication Date: 2015-07-29
田东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is difficult to mix the three elements of nickel, cobalt, and manganese evenly, so the synergistic effect of the three elements cannot be fully utilized, and the shape of the prepared material is difficult to control. Usually, the synthesized powder material is composed of random particles. , this material has low bulk density and poor fluidity, which is not conducive to the production of positive electrode materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] NiSO 4 , CoSO 4 , Mn(NO 3 ) 3 According to the molar ratio of Ni:Co:Mn = 16:3:1, it is dissolved in a certain amount of deionized water to prepare a mixed salt solution, in which the total concentration of metal ions is 1mol / L, and 2mol / L NaOH is prepared in addition solution and 1mol / L Na 2 S 2 o 8 solution. Mix 500mL NaOH solution and 300mL NaOH solution with a flow rate of 20mL / min 2 S 2 o 8 The solutions were simultaneously input into 500mL of metal salt mixed aqueous solution for reaction. After the lye and the oxidizing agent solution are completely added, the reaction vessel is sealed, under normal pressure, at 30° C., and the stirring reaction is continued for 5 h to obtain a co-precipitation reaction mixture. The above co-precipitation reaction mixture was subjected to solid-liquid separation, washed 4 times with deionized water, and the filtrate was placed in an oven and vacuum-dried at 100 °C for 12 hours to obtain a dry ternary cathode material p...

Embodiment 2

[0024] NiSO 4 , CoSO 4 , Mn(NO 3 ) 3 According to the molar ratio of Ni:Co:Mn=16:3:1, it is dissolved in a certain amount of deionized water to prepare a mixed salt solution, in which the total concentration of metal ions is 1mol / L, and 2mol / L NaOH is prepared in addition solution and 1mol / L Na 2 S 2 o 8 solution. Mix 500mL NaOH solution and 300mL NaOH with a metering pump at a flow rate of 20mL / min 2 S 2 o 8The solutions were simultaneously input into 500mL of metal salt mixed aqueous solution for reaction. After the lye and the oxidizing agent solution are completely added, the reaction vessel is sealed, under normal pressure, at 30° C., and the stirring reaction is continued for 5 h to obtain a co-precipitation reaction mixture. The above co-precipitation reaction mixture was subjected to solid-liquid separation, washed with deionized water four times, and the filtrate was placed in an oven and vacuum-dried at 100° C. for 12 hours to obtain a dry ternary cathode...

Embodiment 3

[0029] NiSO 4 , CoSO 4 , Mn(NO 3 ) 3 According to the molar ratio of Ni:Co:Mn = 16:3:1, it is dissolved in a certain amount of deionized water to prepare a mixed salt solution, in which the total concentration of metal ions is 1mol / L, and 1mol / L NaOH is prepared in addition solution and 0.5mol / L Na 2 S 2 o 8 solution. Mix 500mL NaOH solution and 300mL NaOH with a metering pump at a flow rate of 20mL / min 2 S 2 o 8 The solutions were simultaneously input into 500mL of metal salt mixed aqueous solution for reaction. After the lye and the oxidizing agent solution are completely added, the reaction vessel is sealed, under normal pressure, at 30° C., and the stirring reaction is continued for 5 h to obtain a co-precipitation reaction mixture. The above co-precipitation reaction mixture was subjected to solid-liquid separation, washed 4 times with deionized water, and the filtrate was placed in an oven and vacuum-dried at 100 °C for 12 hours to obtain a dry ternary cathod...

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Abstract

The invention relates to the field of an electrode material, in particular to a nickel cobalt manganese ternary electrode material and a preparing method thereof, and aims at solving the technical problem of poor circulation performance of the nickel cobalt manganate ternary positive electrode material in the prior art. A coprecipitation method is adopted for preparing a ternary positive electrode material precursor, and the physical and chemical properties of the ternary positive electrode material precursor are improved, so that the accumulation density and the circulation performance of the nickel cobalt manganate ternary positive electrode material are improved, in addition, surface covering is adopted for modifying the ternary positive electrode material, and the performance of the nickel cobalt manganate ternary positive electrode material is improved.

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 nickel-cobalt lithium manganate ternary positive electrode material, and belongs to the technical field of energy materials. Background technique [0002] Lithium-ion batteries have the advantages of high energy, long life, no memory effect and low pollution, and are widely used in mobile phones, computers, electric bicycles, electric vehicles, national defense and other fields. At present, the positive electrode materials used in lithium-ion batteries mainly include lithium cobalt oxide, lithium iron phosphate, lithium manganese oxide and lithium nickel cobalt manganese oxide. With the development of power batteries used in electric vehicles, due to lithium iron phosphate and lithium manganate The energy density is too low to meet its requirements. Lithium nickel cobalt manganese oxide has the advantages of hi...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/131H01M4/1391H01M4/362H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 田东
Owner 田东
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