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Lithium-intercalated metal oxide and preparation method and application thereof

A lithium metal oxide and alkali metal compound technology, which is applied in the field of lithium intercalation metal oxide and its preparation, can solve the problems of low initial discharge capacity and capacity retention rate of lithium-ion batteries, difficulty in uniform distribution of lithium elements, etc.

Active Publication Date: 2020-11-24
XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects that the existing nickel-containing positive electrode material system needs a high temperature and high pressure process to intercalate lithium and the lithium element is difficult to achieve an ideal uniform distribution state, which leads to the low initial discharge capacity and capacity retention rate of the obtained lithium ion battery , and provide a metal oxide that can achieve good lithium intercalation only at normal temperature and pressure, and its preparation method and application. The first discharge capacity and capacity retention rate of the lithium ion battery corresponding to the lithium intercalation metal oxide thus obtained are both very high

Method used

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  • Lithium-intercalated metal oxide and preparation method and application thereof
  • Lithium-intercalated metal oxide and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0037] S1. Combine the metal mixture (Ni, Co, Mn, Zr and W five metals at a molar ratio of 1:1:1:0.04:0.07), nitric acid, high purity water, and sodium sulfate in a molar ratio of 10:2:2:1. At the same time, add 13g / L ammonium sulfate to the reactor for chemical corrosion crystallization reaction, and under normal pressure, control the ORP value of oxidation-reduction potential at -2000mv, the conductivity at 300uS / cm, and the input power of stirring Control at 0.8kw / m 3 ·H, the metal ion concentration is controlled at 6g / L, the pH value is controlled at 7-8, the reaction temperature is controlled at 50°C, the residence time of the material in the reactor is controlled at 30h, the crystallization process continuously consumes water and does not produce excess waste water After full reaction, magnetic particles and slurry are obtained by magnetic separation at a magnetic separation intensity of 200Gas. The slurry is solid-liquid separated to obtain solid particles and filtrate. T...

Embodiment 2

[0041] S1, the metal mixture (NiO, MgO, ZrO and WO 3 The four metal oxides are mixed at a molar ratio of 1:0.008:0.005:0.008), nitric acid, high-purity water, and sodium chloride are simultaneously added to the reactor for chemical corrosion crystallization reaction in parallel flow according to the molar ratio of 10:2:1:2. Add 30g / L of ethylenediaminetetraacetic acid, under normal pressure, control the ORP value of oxidation-reduction potential at -600mv, the conductivity at 500uS / cm, and the stirring input power at 0.9kw / m 3 ·H, the metal ion concentration is controlled at 9g / L, the pH value is controlled at 8-10, the reaction temperature is controlled at 60℃, the residence time of the material in the reactor is controlled at 15h, the crystallization process continuously consumes water and does not produce excess waste water After full reaction, magnetic particles and slurry are obtained by magnetic separation at a magnetic separation intensity of 5000 Gas. The slurry is solid-...

Embodiment 3

[0045] S1. Combine the metal mixture (Ni, Co, Al, Zr and Ti five metals at a molar ratio of 1:0.12:0.15:0.01:0.012), nitric acid, high purity water, and sodium sulfate in a molar ratio of 10:2:1:2. At the same time, add 30g / L ammonium chloride to the reactor for chemical corrosion crystallization reaction. Under normal pressure, control the ORP value of the oxidation-reduction potential at 100mv, the electrical conductivity at 5000uS / cm, and stir the input power Control at 0.7kw / m 3 ·H, the metal ion concentration is controlled at 15g / L, the pH value is controlled at 6-8, the reaction temperature is controlled at 50°C, the residence time of the material in the reactor is controlled at 15h, the crystallization process continuously consumes water and does not produce excess waste water After full reaction, magnetic particles and slurry are obtained by magnetic separation at a magnetic separation intensity of 3000Gas. The slurry is solid-liquid separated to obtain solid particles a...

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Abstract

The invention belongs to the field of lithium ion batteries, and relates to a lithium-intercalated metal oxide and a preparation method and application thereof. The preparation method of the lithium-intercalated metal oxide comprises the following steps: sequentially carrying out chemical corrosion crystallization reaction, magnetic separation, solid-liquid separation and washing on nickel-containing metal and / or nickel-containing metal oxide, an oxidant I, water and a complexing agent, pre-sintering the obtained nickel-containing metal hydroxide in an oxidizing atmosphere at the temperature of 180-350 DEG C for 2-10 hours, and sequentially carrying out lithium intercalation reaction, solid-liquid separation and calcination on the obtained nickel-containing precursor, an alkali metal compound, an oxidant II, water and an optional additive. The lithium-intercalated metal oxide prepared by the method provided by the invention is used as a lithium ion battery cathode material, so that thefirst discharge capacity and capacity retention rate of the lithium ion battery can be effectively improved. In addition, no wastewater is generated in the chemical corrosion crystallization reactionprocess, and water is continuously consumed, so that the purpose of environmental friendliness can be achieved.

Description

Technical field [0001] The invention belongs to the field of lithium ion batteries, and specifically relates to a lithium intercalation metal oxide and a preparation method and application thereof. Background technique [0002] With the application of lithium-ion batteries in electric vehicles, lithium-ion battery cathode materials have received widespread attention. The performance of lithium-ion battery cathode materials directly affects the use and promotion of electric vehicles, and the development of high capacity, high safety, and long life , Low-cost, environmentally friendly cathode materials for lithium-ion batteries are the main direction for future development. Vehicle-mounted cathode materials currently present a state of coexistence of multiple types of materials. Lithium iron phosphate, multi-element materials, and lithium manganese oxide are currently used in the EV field. Among them, Panasonic of Japan and LG of South Korea have successfully applied high-nickel ma...

Claims

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Application Information

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IPC IPC(8): C01G53/04C01G53/00H01M4/525H01M10/0525
CPCC01G53/04C01G53/42H01M4/525H01M10/0525C01P2004/03C01P2006/40H01M2004/028Y02E60/10
Inventor 马跃飞林予舒余康杰
Owner XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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