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A kind of nickel cobalt manganese carbonate and its preparation method and application

A technology of nickel-cobalt lithium manganese oxide and carbonate, applied in chemical instruments and methods, nickel compounds, structural parts, etc., can solve the problems of destroying the surface structure and affecting the electrochemical performance of materials, so as to achieve good electrochemical performance and reduce The effect of battery flatulence problem and improvement of surface structure stability

Active Publication Date: 2021-02-19
JIANGMEN KANHOO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In response to this problem, water washing is generally used to reduce residual lithium, but water washing will destroy the surface structure of the affected material and affect the electrochemical performance of the material.

Method used

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  • A kind of nickel cobalt manganese carbonate and its preparation method and application
  • A kind of nickel cobalt manganese carbonate and its preparation method and application
  • A kind of nickel cobalt manganese carbonate and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Add 1.69g NiSO 4 ·7H 2 O, 0.17g CoSO 4 ·7H 2 O and 0.1 g MnSO 4 ·H 2 O was dissolved in 100mL deionized water, 0.43g urea was added, stirred for 10 minutes to completely dissolve each solute, and a mixed aqueous solution was obtained;

[0037] 2) Add 10 mL of tetrahydrofuran into the mixed aqueous solution prepared above, and ultrasonically treat it for 30 minutes while stirring, then pour it into a high-pressure reaction kettle while stirring, seal it and place it in a constant temperature blast drying oven, and conduct a hydrothermal reaction at 120°C for 10 minutes. hours, take it out after cooling to room temperature, centrifuge the mixture after the hydrothermal reaction, remove the solid phase of the lower layer, wash with water and ethanol respectively, and then vacuum-dry at 80°C for 3 hours to obtain nickel-cobalt-manganese carbonate;

[0038] 3) Weigh 100g of high-nickel ternary nickel-cobalt-manganese lithium and 0.4g of the above-mentioned nickel-cob...

Embodiment 2

[0040] 1) Add 2.25g NiSO 4 ·7H 2 O, 0.28g CoSO 4 ·7H 2 O and 0.17g MnSO 4 ·H 2 O was dissolved in 100mL deionized water, 0.43g urea was added, stirred for 10 minutes to completely dissolve each solute, and a mixed aqueous solution was obtained;

[0041] 2) Add 12 mL of tetrahydrofuran into the mixed aqueous solution prepared above, and ultrasonically treat it for 30 minutes while stirring, then pour it into a high-pressure reaction kettle while stirring, place it in a constant temperature blast drying oven after sealing, and conduct a hydrothermal reaction at 120°C for 10 minutes. hours, take it out after cooling to room temperature, centrifuge the mixture after the hydrothermal reaction, remove the solid phase of the lower layer, wash with water and ethanol respectively, and then vacuum-dry at 80°C for 3 hours to obtain nickel-cobalt-manganese carbonate;

[0042] 3) Weigh 100g of high-nickel ternary nickel-cobalt-manganese lithium and 0.86g of the above-mentioned nickel-...

Embodiment 3

[0044] 1) 2.81g NiSO 4 ·7H 2 O, 0.42g CoSO 4 ·7H 2 O and 0.25g MnSO 4 ·H 2 O was dissolved in 100mL deionized water, 0.43g urea was added, stirred for 10 minutes to completely dissolve each solute, and a mixed aqueous solution was obtained;

[0045] 2) Add 16 mL of tetrahydrofuran into the mixed aqueous solution prepared above, and ultrasonically treat it for 30 minutes while stirring, then pour it into a high-pressure reaction kettle while stirring, seal it and place it in a constant temperature blast drying oven, and conduct a hydrothermal reaction at 120°C for 10 minutes. hours, take it out after cooling to room temperature, centrifuge the mixture after the hydrothermal reaction, remove the solid phase of the lower layer, wash with water and ethanol respectively, and then vacuum-dry at 80°C for 3 hours to obtain nickel-cobalt-manganese carbonate;

[0046] 3) Weigh 100g of high-nickel ternary nickel-cobalt-manganese lithium and 1.5g of the above-mentioned nickel-cobalt-...

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Abstract

The invention discloses a method for preparing nickel-cobalt-manganese carbonate. The method is simple and convenient in process and low in preparation cost. Nano-scale nickel-cobalt-manganese carbonate with excellent surface modification effect. The invention also discloses a method for surface modification of high-nickel ternary nickel-cobalt manganese oxide lithium, specifically the nickel-cobalt-manganese carbonate prepared by the invention is used to modify the surface of high-nickel ternary nickel-cobalt lithium manganese oxide, the method It effectively improves the stability of the surface structure of the high-nickel ternary nickel-cobalt lithium manganese oxide, reduces the residual lithium on the surface, and improves the electrochemical performance and safety factor of the high-nickel ternary nickel-cobalt lithium manganese oxide. Using the modified high-nickel ternary nickel-cobalt lithium manganese oxide as the positive electrode material of the ternary lithium-ion battery can solve the problem of flatulence of the battery, greatly improve the safety performance of the battery, and provide help for its application in the field of power batteries .

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery materials, and in particular relates to a nickel-cobalt-manganese carbonate and a preparation method and application thereof. Background technique [0002] High nickel ternary nickel cobalt lithium manganese oxide (LiNi 0.8 co 0.1 mn 0.1 o 2 ) structure is similar to that of lithium cobaltate, both of which are α-NaFeO 2 The layered structure belongs to the point group of R-3m space. Li atoms occupy the 3a position, oxygen atoms occupy the 6c position, Ni, Co, and Mn occupy the 3b position, and each transition metal atom is MO surrounded by 6 oxygen atoms 6 In an octahedral structure, lithium ions intercalate transition metal atoms and oxygen atoms to form layers. Lithium ions can move freely on the two-dimensional surface between layers to form a migration path for lithium ions during charge and discharge. High-nickel ternary nickel-cobalt lithium manganese oxide is a solid sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525
CPCC01G53/006C01P2004/03C01P2006/40C01P2006/80H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 陆俊杰范江吴建华史镇洪邓慧君苏柏涛李邑柯赵健辉邓晓燕万国江
Owner JIANGMEN KANHOO IND
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