Lithium-ion battery positive electrode material prepared by rotary device and its preparation method and application

A technology for lithium-ion batteries and positive electrode materials, which can be applied to battery electrodes, positive electrodes, secondary batteries, etc., and can solve the problems of incapable of large-scale production and high energy consumption

Active Publication Date: 2020-10-20
湖南金富力新能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem solved by the present invention is: the existing high-nickel positive electrode materials for lithium-ion batteries have high energy consumption in the preparation process, cannot be mass-produced, and the product performance needs to be improved. Therefore, a new high-efficiency Preparation

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  • Lithium-ion battery positive electrode material prepared by rotary device and its preparation method and application
  • Lithium-ion battery positive electrode material prepared by rotary device and its preparation method and application
  • Lithium-ion battery positive electrode material prepared by rotary device and its preparation method and application

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preparation example Construction

[0064] In a preferred embodiment, the chemical formula of the high-nickel lithium ion positive electrode material of the present invention is Li x Ni a co b m c R d o 2 , wherein M is selected from manganese or aluminum, R is a doping element, 0.50

Embodiment 1

[0092] Select a 1000L fusion machine, turn on the stirring (500rpm), and add 500kg of nickel-cobalt-manganese precursor (Ni 0.69 co 0.14 mn 0.16 (OH) 2 ), then weighed 231.5kg monohydrate lithium hydroxide powder and joined in the fusion machine, then weighed 0.30kg basic cobalt carbonate (300ppm by finished product quality), and added 190kg by 80wt% solid content under stirring to remove Ionized water, 7.4kg polyimide powder (1% by finished product mass), after stirring (300rpm) for 0.5 hours, further reduce the speed (50rpm) and stir for 20min and discharge to form a molded paste material for subsequent use.

[0093] Adopt ventilated 24m roller kiln. Set the temperature in the heating zone to 200°C, feed air (pressure 0.01Mpa, oxygen content volume ratio 40%, gas input 600Nm 3 Under the condition of / h), the above-mentioned pasty material is packed into the ceramic sagger for the first sintering, the sintering time is 5 hours, the material is isolated from the air and co...

Embodiment 2

[0099] Select 1000L coulter type mixer for use, start stirring (main shaft 120rpm, side knife speed 1300rpm), add 500kg nickel-cobalt-manganese precursor (Ni 0.6 co 0.19 mn 0.21 (OH) 2 ), then weighed 209kg of lithium carbonate powder and added it to a coulter type mixer, and added 3.85kg of tetrabutyl titanate (industrial grade, purity 98.5% content to about 1000ppm in terms of finished product titanium content) under stirring conditions, 29kg deionized water, 143kg spherical graphite (20% by finished product quality), after stirring (1300rpm) 2 hours, further reduce the speed (3-5rpm) and stir for 6 hours discharging to form the powdered material of molding for subsequent use.

[0100] The ventilation 15m rotary kiln is adopted. Set the temperature in the heating zone to 500°C, feed oxygen-enriched air (pressure 0.02Mpa, oxygen content volume ratio 99.5%, gas input 50Nm 3 Under the condition of above-mentioned pasty material under the condition of sintering for the first...

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Abstract

The invention relates to a high-nickel positive electrode material for lithium-ion batteries prepared by a rotary kiln and a preparation method and application thereof. The positive electrode materialis prepared in an independent closed rotary device. The chemical formula is Li<x>NiCoM<c>R<d>O2, wherein M is manganese or aluminum, R is a doping element, 0.50<x<1.15, 0.55<a<0.95, 0.02<b<0.2,0.01<=c<0.25, 0.98<=a+b+c<=1.05, and 0<=d<0.1. The working temperature of the rotary device is 450-860 DEG C, and the speed is 10-20rpm. A ceramic lining piece or a coating is arranged on the inner wall of the rotary device. A temperature-resistant ceramic rotary device is employed to prepare the high-nickel positive electrode material, which can greatly reduce energy consumption, high-purity oxygen consumption and cost.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, mainly to the field of cathode materials for lithium-ion batteries, and in particular to a high-nickel cathode material for lithium-ion batteries prepared by a rotary device and its preparation method and application. Background technique [0002] In recent years, with the rise of smart phones and smart cars, the requirements for the power energy density and safety of mobile devices are getting higher and higher. At present, common cathode materials for lithium-ion batteries, such as lithium cobaltate, lithium manganate and lithium iron phosphate The material tends to be gradually replaced by high-nickel materials with low cobalt content such as nickel-cobalt lithium manganese oxide. Nickel-cobalt lithium manganese oxide materials (referred to as ternary materials) are usually layered rock salt structure materials, in which Ni, Co, and Mn are of the same period. Neighboring elements, usually ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/0525B01J19/28
CPCB01J19/28H01M4/485H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 杨亿华王海涛钟毅
Owner 湖南金富力新能源股份有限公司
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