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High-nickel ternary material of lithium ion battery and preparation method of high-nickel ternary material

A high-nickel ternary material and lithium-ion battery technology, applied in electrical components, battery electrodes, secondary batteries, etc., can solve the problems of capacity loss, poor performance of large ball rate, etc., achieve high residual alkali on the surface, reduce electrochemical Performance difference, effect of high nickel content

Active Publication Date: 2018-02-16
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this combination will inevitably cause a certain capacity loss. At the same time, the rate performance of the large ball is relatively poor.

Method used

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  • High-nickel ternary material of lithium ion battery and preparation method of high-nickel ternary material
  • High-nickel ternary material of lithium ion battery and preparation method of high-nickel ternary material
  • High-nickel ternary material of lithium ion battery and preparation method of high-nickel ternary material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A high-nickel ternary material for a lithium ion battery, comprising fast ion conductor coated particles and nano-alumina coated particles, the fast ion conductor coated particle includes a large grain core and a fast ion conductor layer, the nano-alumina coated particle Particles include a small particle core and a nano-alumina layer; fast ion conductor coated particles and nano-alumina coated particles are evenly dispersed, the fast ion conductor layer is coated on the outside of the large particle core, and the nano-alumina layer is coated on the outside of the small particle core; The conductor layer is lithium lanthanum titanate, and the large and small cores are high-nickel ternary materials with the same chemical composition;

[0029] Among them, the chemical composition of the large grain core and the small grain core is LiNi 0.85 co 0.1 mn 0.05 o 2 , the particle size of the large particle core is 18 μm, the particle size of the small particle core is 3 μm, ...

Embodiment 2

[0032] A high-nickel ternary material for a lithium ion battery, comprising fast ion conductor coated particles and nano-alumina coated particles, the fast ion conductor coated particle includes a large grain core and a fast ion conductor layer, the nano-alumina coated particle Particles include a small particle core and a nano-alumina layer; fast ion conductor coated particles and nano-alumina coated particles are evenly dispersed, the fast ion conductor layer is coated on the outside of the large particle core, and the nano-alumina layer is coated on the outside of the small particle core; The conductor layer is lithium lanthanum titanate, and the large grain core and the small grain core are high-nickel ternary materials with the same chemical composition.

[0033] The preparation method of the above-mentioned high-nickel ternary material for a lithium-ion battery comprises the following steps: coating the large grain core with a fast ion conductor to obtain a fast ion condu...

Embodiment 3

[0035] A high-nickel ternary material for a lithium ion battery, comprising fast ion conductor coated particles and nano-alumina coated particles, the fast ion conductor coated particle includes a large grain core and a fast ion conductor layer, the nano-alumina coated particle Particles include a small particle core and a nano-alumina layer; fast ion conductor coated particles and nano-alumina coated particles are evenly dispersed, the fast ion conductor layer is coated on the outside of the large particle core, and the nano-alumina layer is coated on the outside of the small particle core; The conductor layer is lithium lanthanum titanate, and the large and small cores are high-nickel ternary materials with the same chemical composition;

[0036] Among them, the chemical composition of the large grain core and the small grain core is LiNi 0.98 co 0.01 mn 0.01 o 2 , the particle size of the large particle core is 14 μm, the particle size of the small particle core is 5 μm,...

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Abstract

The invention discloses a high-nickel ternary material of a lithium ion battery. The high-nickel ternary material comprises quick ion conductor-coated particles and nanometer aluminum oxide-coated particles; the quick ion conductor-coated particle comprises a big-particle core and a quick ion conductor layer; the nanometer aluminum oxide-coated particle comprises a small-particle core and a nanometer aluminum oxide layer; the quick ion conductor-coated particles and nanometer aluminum oxide-coated particles are uniformly dispersed; the quick ion conductor layer coats the big-particle core; thenanometer aluminum oxide layer coats the small-particle core; the quick ion conductor layer is lithium lanthanum titanate; and the big-particle core and the small-particle core are the high-nickel ternary materials with the same chemical components. The invention also discloses a preparation method of the high-nickel ternary material of the lithium ion battery. By performing independent and targeted coating on the high-nickel ternary materials with the same chemical components and different dimensions, and by performing mixing based on a proper proportion, the rate capability and the cycle performance of the high-nickel ternary material can be improved on the basis of capacity maintaining.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a high-nickel ternary material for lithium-ion batteries and a preparation method thereof. Background technique [0002] Due to its high working voltage, energy density, long life and environmental friendliness, lithium-ion batteries have become the power source of a new generation of electric vehicles, electric tools and electronic products, and have been widely used in energy, transportation, communications, etc. in different fields. At the end of 2015, in the "13th Five-Year" new energy vehicle pilot special project issued by the Ministry of Science and Technology, it is required that by 2020, the specific energy of lithium-ion power batteries in my country will reach 300Wh / kg, and even 350Wh / kg. [0003] Ternary materials, especially high-nickel ternary materials, are the current research hotspots, and have been widely used due to their high capacity and excell...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M4/58H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/485H01M4/505H01M4/525H01M4/5825H01M10/0525Y02E60/10
Inventor 高玉仙陈方李道聪
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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