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High-voltage nickel-manganese binary positive electrode material as well as preparation method and application thereof

A positive electrode material, high voltage technology, applied in the direction of electrical components, battery electrodes, chemical instruments and methods, etc., can solve the problems of low reactivity, uneven mixing, etc., achieve low cost, accelerate industrialization process, inhibit or repair The effect of oxygen deficiency

Pending Publication Date: 2022-04-15
湖南海利锂电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-voltage nickel-manganese binary positive electrode material and its preparation method and application, so as to solve the problems of uneven mixing and low reactivity in the market today.

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  • High-voltage nickel-manganese binary positive electrode material as well as preparation method and application thereof

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Embodiment 1

[0032] Such as figure 1 Shown, a kind of high-voltage type nickel-manganese binary cathode material and its preparation method and application comprise the following steps:

[0033] 1. Preparation of spherical manganese-coated nickel-type nickel-manganese binary precursor S.

[0034] 2. Preparation of zirconium-doped catalyst-type dopant P with high specific surface area and high activity.

[0035] 3. Mix the nickel-manganese binary precursor S, the lithium source, and the catalyst-type dopant P according to a certain ratio, then perform a calcination, and after natural cooling, crushing, and sieving, the niobium-doped , zirconium and phosphorus high-voltage nickel-manganese binary cathode material.

[0036] (1) Configure solution or suspension:

[0037] a. Configure high-purity manganese sulfate with deionized water to form 25.93 L of manganese sulfate solution with a concentration of 0.5 mol / L, and filter after dissolving completely;

[0038] b. The sodium hydroxide soluti...

Embodiment 2

[0052] Such as figure 1 As shown, this embodiment provides a high-voltage nickel-manganese binary positive electrode material, and its preparation method includes the following steps:

[0053] (1) Configure solution or suspension:

[0054] a. Configure high-purity manganese sulfate with deionized water to form 19.45 L of manganese sulfate solution with a concentration of 0.8 mol / L, and filter after dissolving completely;

[0055] b. The sodium hydroxide solution is configured into 31.12 L of sodium hydroxide solution with a concentration of 1.0 mol / L with deionized water, and filtered;

[0056] c. Weigh 492.09g of battery-grade nickel hydroxide with D50=6.0μm, add deionized water, and adjust to a suspension with a concentration of 60g / L;

[0057] d. Weighing 100g of niobium oxyphosphate powder with a particle size of 3.5 μm is configured into a suspension with a concentration of 80g / L with deionized water;

[0058] e. The zirconium acetate solution with a purity of 99.5% (z...

Embodiment 3

[0069] Such as figure 1 As shown, this embodiment provides a high-voltage nickel-manganese binary positive electrode material, and its preparation method includes the following steps:

[0070] (1) Configure solution or suspension:

[0071] a. Configure high-purity manganese sulfate with deionized water to form 12.96L of manganese sulfate solution with a concentration of 1.0mol / L, and filter after dissolving completely;

[0072] b. The sodium hydroxide solution is configured into 32.40 L of sodium hydroxide solution with a concentration of 0.8 mol / L with deionized water, and filtered;

[0073] c. Weigh 411.55g of battery-grade nickel hydroxide with D50=4.0μm, add deionized water, and adjust to a suspension with a concentration of 50g / L;

[0074] d. Weighing 100g of niobium oxyphosphate powder with a particle size of 5.0 μm is configured into a suspension with a concentration of 70g / L with deionized water;

[0075] e. The zirconium acetate solution with a purity of 99.5% (23%...

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Abstract

The invention is applicable to the technical field of lithium ion batteries, and provides a high-voltage type nickel-manganese binary positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: (1) preparing a spherical manganese-coated nickel type nickel-manganese binary precursor S; (2) preparing a zirconium-doped catalyst type dopant P with high specific surface area and high activity; and (3) uniformly mixing the nickel-manganese binary precursor S, a lithium source and the high-specific-surface-area catalyst type dopant P according to a certain proportion, performing primary calcination, and performing natural cooling, crushing and sieving to obtain the niobium, zirconium and phosphorus doped high-voltage type nickel-manganese binary positive electrode material. According to the invention, in-situ solid-phase reaction is realized, three elements of niobium, zirconium and phosphorus are uniformly doped, the synergistic effect among different elements is fully utilized, and the structural stability of the material under high voltage is greatly enhanced.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a high-voltage nickel-manganese binary positive electrode material and a preparation method and application thereof. Background technique [0002] Nickel-manganese binary cathode materials have both performance and cost advantages, and are one of the most promising cathode materials for the next generation. Among the many methods for preparing nickel-manganese binary cathode materials, the method of solid-phase sintering with manganese source and nickel source is undoubtedly the simplest, but this method is prone to LixNi1- xO heterophase, the capacity and cycle of the material are generally poor, especially the stability of mass production is too poor to meet the requirements of industrial production; another method that is expected to be industrialized is to prepare nickel-manganese binary precursors by co-precipitation The main disadvantages of this method are f...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525
CPCY02E60/10
Inventor 汪永斌彭爱国庄新娟杨平生廖利斌刘艳
Owner 湖南海利锂电科技有限公司
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