Lithium ion battery positive electrode material prepared by high temperature reaction device and its preparation method and application

A lithium-ion battery, cathode material technology, applied in battery electrodes, secondary battery manufacturing, positive electrodes, etc., can solve the problems of product performance to be improved, small single-line production capacity, high cost, and achieve expansion of production capacity, reduction of energy consumption and use. The effect of air volume and simple operation

Active Publication Date: 2020-12-01
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

[0016] 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, small single-line production capacity, high cost, and product performance needs to be improved

Method used

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  • Lithium ion battery positive electrode material prepared by high temperature reaction device and its preparation method and application
  • Lithium ion battery positive electrode material prepared by high temperature reaction device and its preparation method and application
  • Lithium ion battery positive electrode material prepared by high temperature reaction device and its preparation method and application

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preparation example Construction

[0067] 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

[0099] 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 weigh 138kg lithium hydroxide powder and join in the fusion machine, then weigh 0.29kg basic cobalt carbonate (300ppm by finished product quality), add 190kg deionized water by 80wt% solid content under stirring, After stirring (300rpm) for 0.5h, further reduce the speed (50rpm) and stir for 20min to form a formed paste material for later use.

[0100] Adopt ventilated 24m roller kiln. Set the temperature in the heating zone to 200°C, and introduce oxygen-enriched air (the volume ratio of oxygen content is 40%, and the gas input volume is 600Nm 3Under the condition of / h), the above-mentioned pasty material is packed into the ceramic sagger for the first sintering, the sintering time is 15h, the material is cooled to normal temperature, the weight of the incoming and outgoing material is weighed, and the loss on ign...

Embodiment 2

[0106] Select 2000L coulter type mixer with cooling jacket for use, start stirring (main shaft 120rpm, side cutter speed: 1300rpm), add 1000kg of nickel-cobalt-manganese precursor (Ni 0.6 co 0.19 mn 0.21 (OH) 2 ), then weigh 418kg lithium carbonate powder and join in the plow mixer, add 7.65kg tetrabutyl titanate (industrial grade, purity 98.5% content is about 1000ppm in terms of finished product titanium content) under stirring situation, 6kg of deionized water, stirred (1300rpm) for 0.5h, then further reduced speed (3-5rpm) and stirred for 6h to form a formed powdery material for later use.

[0107] The ventilation 15m rotary kiln is adopted. Set the temperature in the heating zone to 500°C, and introduce oxygen-enriched air (the volume ratio of oxygen content is 70%, and the gas input volume is 150Nm 3 Under the condition of / h), put the above-mentioned pasty material into a ceramic bowl for the first sintering, the sintering time is 10h, the material is isolated from ...

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Abstract

The invention relates to a high-nickel positive electrode material for lithium-ion batteries prepared by a high-temperature reaction device and its preparation method and application. The positive electrode material is prepared in an independently closed high-temperature reaction device, and its chemical formula 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<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, 0≤d<0.1; wherein, the mass fraction of the nickel element in the positive electrode material is >30%, preferably >40%; wherein, the high temperature reaction device has a stirring function, the temperature is 400-900°C, and the stirring speed is 5-50rpm; the high-temperature reaction device includes a kettle body, a rotating shaft arranged in the center of the kettle body and a motor connected to the rotating shaft, and ceramic patches or coatings are provided on the inner wall of the kettle body and the surface of the rotating shaft. The positive electrode material preparation process of the present invention greatly reduces the energy consumption and gas consumption of the high nickel lithium ion battery positive electrode material, expands production capacity, reduces costs and further promotes the application of lithium ion batteries.

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 using a high-temperature reaction device, 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, power density and safety of mobile devices are getting higher and higher. At present, the common cathode materials for lithium-ion batteries mainly include lithium cobalt oxide, lithium manganese oxide, Lithium nickel cobalt manganate, lithium nickel cobalt aluminate and lithium iron phosphate. Although lithium cobalt oxide has high energy density, it is mainly used in lithium-ion batteries in the 3C field due to limited cobalt storage and poor safety of the prepared lithium-ion battery system. Lithium manganate and lit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/04H01M10/0525B01J19/18
CPCB01J19/18H01M4/485H01M4/505H01M4/525H01M10/0427H01M10/0525H01M2004/028Y02E60/10Y02P70/50
Inventor 杨亿华钟毅王海涛
Owner 湖南金富力新能源股份有限公司
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