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A kind of nickel cobalt lithium aluminate electrode material and its preparation method and application

A technology of nickel-cobalt lithium aluminate and electrode materials, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems affecting the performance of materials, etc., to improve electrical conductivity and high temperature stability, high electrical conductivity, and increase electrical conductivity Effect

Active Publication Date: 2018-11-16
江苏贝肯盛创新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the method of coating the surface of nickel-cobalt-lithium aluminate, there are gaps between the coating and the coating after firing, which affects the performance of the material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a preparation method of nickel-cobalt-lithium-aluminate electrode material, which comprises the following steps:

[0035]Step 1: Dissolve 0.75mol nickel acetate, 0.2mol cobalt acetate and 0.05mol aluminum acetate in 100ml deionized water, stir well, then add 2mol molybdenum disulfide as an inducer to obtain a mixed solution, then add ammonia water to adjust the pH of the mixed solution The value was 8.0, stirred for 60min to obtain a suspension;

[0036] Step 2: Weigh 1mol of lithium acetate, stir and dissolve it in 100ml of deionized water to obtain a lithium acetate solution;

[0037] Step 3: At a temperature of 55°C, add lithium acetate solution dropwise to the above suspension at a rate of 20ml / min, stir while adding dropwise, and then stir at room temperature for 2.5h, then filter with suction, and dry at 100°C Dry under vacuum for 16h to obtain powder;

[0038] Step 4: Grinding the powder for 15 minutes in a dry environment, and then pla...

Embodiment 2

[0042] This embodiment provides a preparation method of nickel-cobalt-lithium-aluminate electrode material, which comprises the following steps:

[0043] Step 1: Dissolve 0.8mol nickel acetate, 0.15mol cobalt nitrate and 0.05mol aluminum acetate in 100ml deionized water, stir well, then add 3mol graphene as an inducer to obtain a mixed solution, then add ammonia water to adjust the pH value of the mixed solution 9.0, stirred for 60min to obtain a suspension;

[0044] Step 2: Weigh 1.05mol of lithium acetate, stir and dissolve it in 100ml of deionized water to obtain a lithium acetate solution;

[0045] Step 3: At a temperature of 60°C, add lithium acetate solution dropwise to the above suspension at a rate of 20ml / min, stir while adding dropwise, and then stir at room temperature for 2.5h, then filter with suction, and cool at 100°C Dry under vacuum for 16h to obtain powder;

[0046] Step 4: Grinding the powder in a dry environment for 15 minutes, and then placing it in a tu...

Embodiment 3

[0050] This embodiment provides a preparation method of nickel-cobalt-lithium-aluminate electrode material, which comprises the following steps:

[0051] Step 1: Dissolve 0.75mol of nickel nitrate, 0.2mol of cobalt nitrate and 0.05mol of aluminum isopropoxide in 100ml of isopropanol, stir thoroughly, then add 2mol of tungsten disulfide as an inducer to obtain a mixed solution, then add ammonia water to adjust the mixture The pH of the solution was 10, stirred for 60 minutes to obtain a suspension;

[0052] Step 2: Weigh 1.02mol of lithium acetate, fully stir and dissolve in 100ml of isopropanol to obtain a lithium acetate solution;

[0053] Step 3: At a temperature of 65°C, add the lithium acetate solution dropwise to the above suspension at a rate of 20ml / min, stir while adding dropwise, and then stir at room temperature for 2.5h, then filter with suction, and dry at 100°C Dry under vacuum for 16h to obtain powder;

[0054] Step 4: Grinding the powder for 15 minutes in a dr...

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Abstract

The invention provides a nickel, cobalt and lithium aluminate electrode material, a method for preparing the same and application of the nickel, cobalt and lithium aluminate electrode material. Two-dimensional nanometer materials and layered nickel, cobalt and lithium aluminate are stacked and compounded with one another in an interlayer manner, the layered nickel, cobalt and lithium aluminate is positioned between two layers of two-dimensional nanometer materials to form a sandwich structure, and a molar ratio of the two-dimensional nanometer materials to the nickel, cobalt and lithium aluminate is (2-5):1. According to the method for preparing the nickel, cobalt and lithium aluminate electrode material, the two-dimensional nanometer materials are used as inducers for growing and synthesizing the nickel, cobalt and lithium aluminate, nanometer materials with tungsten disulfide, molybdenum disulfide or graphene two-dimensional layer structures are led in procedures for preparing the nickel, cobalt and lithium aluminate, the nickel, cobalt and lithium aluminate with stable layer structures can be induced to be synthesized by the aid of the surface activity of the two-dimensional nanometer materials and the layer structures, accordingly, the shortcoming of flocculation of aluminum can be overcome, the procedures to prepare the nickel, cobalt and lithium aluminate are stable and uniform and are easy to control, and the prepared nickel, cobalt and lithium aluminate can be completely crystallized and is compact in structure and high in tap density and electric conductivity.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery cathode materials, and relates to a nickel-cobalt-lithium-aluminate electrode material and a preparation method and application thereof. Background technique [0002] Energy is an important material basis for human survival and development, the driving force behind various economic activities, and an important indicator of the level of social and economic development. With the gradual depletion of fossil fuels and the global warming it brings, many researchers have begun to pay attention to the new energy industry. Among them, lithium-ion batteries have become the research field of new energy due to a series of remarkable advantages such as high working voltage, large specific energy, light weight, small size, long cycle life, no memory effect, fast charging and discharging, and no environmental pollution. hotspot. [0003] With the advancement of science and technology, higher requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/485H01M4/525H01M4/62H01M4/624H01M4/625H01M10/0525Y02E60/10
Inventor 陈庆曾军堂王镭迪
Owner 江苏贝肯盛创新能源科技有限公司