A kind of nickel-manganese-based positive electrode material precursor and the synthesis method of positive electrode material thereof

A positive electrode material and synthesis method technology, applied in the field of lithium ion battery material preparation, can solve the problems of electrochemical stability and low charge and discharge capacity, long co-precipitation reaction time, difficult filtration, etc., to achieve stable electrochemical performance, and each component Uniform distribution and good crystallinity

Active Publication Date: 2021-03-16
SICHUAN UNION SHINE NEW ENERGY SCI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The method can solve the following technical problems: (1) improve the electrochemical stability and low charge and discharge capacity of nickel and manganese as the main components of binary, ternary, or quaternary and more multi-element positive electrode materials; (2) ) Difficult filtration of ternary cathode material precursors in the process of co-precipitation; (2) The problem of long co-precipitation reaction time and low yield; (3) Completely eliminate the recovery and pollution of heavy metal ions in the production process of ternary cathode materials question

Method used

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  • A kind of nickel-manganese-based positive electrode material precursor and the synthesis method of positive electrode material thereof
  • A kind of nickel-manganese-based positive electrode material precursor and the synthesis method of positive electrode material thereof
  • A kind of nickel-manganese-based positive electrode material precursor and the synthesis method of positive electrode material thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039]Take 416.3g of battery-grade nickel sulfate hexahydrate, 27.38g of battery-grade manganese sulfate monohydrate, 36.3g of battery-grade aluminum sulfate octadecahydrate, add deionized water, and prepare a 1L solution, which is converted into nickel sulfate, manganese sulfate, and aluminum sulfate The total metal ion concentration in the mixed aqueous solution is 1.8mol / l, which is solution A; take 144g of analytically pure sodium hydroxide, add deionized water, and be prepared into a 1L solution, and the converted sodium hydroxide concentration is 3.6mol / l, which is for solution B. Add 450ml of bottom water (deionized water) into a 3L reactor, first place 2.11g of nano-metal nickel powder and 1.98g of nano-metal manganese powder in the reactor, and then pump A solution and B solution into the 3L reactor at the same time Co-precipitation reaction is carried out, the reaction conditions are: stirring intensity: medium, feeding time 30min, reaction time 1.0h, aging time 0.5h...

Embodiment 2

[0041] Take 416.3g of battery-grade nickel sulfate hexahydrate, 27.38g of battery-grade manganese sulfate monohydrate, 36.3g of battery-grade aluminum sulfate octadecahydrate, add deionized water, and prepare a 1L solution, which is converted into nickel sulfate, manganese sulfate, and aluminum sulfate The total metal ion concentration in the mixed aqueous solution is 1.8mol / l, which is solution A; take 144g of analytically pure sodium hydroxide, add deionized water, and be prepared into a 1L solution, and the converted sodium hydroxide concentration is 3.6mol / l, which is for solution B. Add 450ml of bottom water (deionized water) into a 3L reactor, first add 2.68g of nickel oxide powder and 2.55g of manganese oxide powder into the reactor, and then pump A and B solutions into the 3L reactor at the same time for co-precipitation reaction , The reaction conditions are: stirring intensity: medium, feeding time 30min, reaction time 2h, aging time 1h, reaction temperature 80°C. V...

Embodiment 3

[0043] Take 416.3g of battery-grade nickel sulfate hexahydrate, 27.38g of battery-grade manganese sulfate monohydrate, 36.3g of battery-grade aluminum sulfate octadecahydrate, add deionized water, and prepare a 1L solution, which is converted into nickel sulfate, manganese sulfate, and aluminum sulfate The total metal ion concentration in the mixed aqueous solution is 1.8mol / l, which is solution A; take 144g of analytically pure sodium hydroxide, add deionized water, and be prepared into a 1L solution, and the converted sodium hydroxide concentration is 3.6mol / l, which is for solution B. Add 450ml of bottom water (deionized water) into a 3L reactor, first add 5.28g of metal Ni powder and 4.944g of Mn powder into the reactor, and then pump the A and B solutions into the 3L reactor at the same time in parallel for co-precipitation reaction. The reaction conditions are: stirring intensity: medium, feeding time 30min, reaction time 2h, aging time 1h, reaction temperature 80°C. Va...

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Abstract

The invention belongs to the field of preparation of lithium-ion battery materials, in particular to a nickel-manganese-based cathode material precursor and a method for synthesizing the cathode material. The synthesis method comprises the steps of 1) adding soluble T salt, soluble nickel salt and soluble manganese salt into deionized water, and configuring a metal salt solution in proportion; 2) taking sodium hydroxide, potassium hydroxide or lithium hydroxide to prepare a precipitant solution ; 3) Add pure water, metal powder or metal oxide in the precipitation reactor, then add the metal salt solution and the precipitant solution into the precipitation reactor after heating respectively to carry out the co-precipitation reaction; filter while it is hot; finally filter The resulting precipitate was stirred and washed with deionized water, and dried in vacuum to obtain a nickel-manganese-based cathode material precursor. Then, the precursor is mixed with a lithium source, pre-calcined, and calcined at a high temperature. The prepared positive electrode material has a perfect layered structure, good crystallinity, stable electrochemical performance, and a charge-discharge capacity of more than 200mAh / g.

Description

technical field [0001] The invention belongs to the field of preparation of lithium-ion battery materials, and specifically relates to a method for synthesizing a binary, ternary, or quaternary or more multi-element positive electrode material NMT positive electrode material and its precursor with nickel and manganese as main components, specifically The invention is a nickel-manganese-based cathode material precursor and a method for synthesizing the cathode material. Background technique [0002] With the rapid development of new energy, high-capacity lithium-ion power batteries have become a hot spot in the development of global new energy production and technology. As the positive electrode material that affects the key part of lithium battery capacity, it is the focus of current technical research. The ternary positive electrode materials NCA and NCM, especially high-nickel NCA and NCM, have the advantages of large capacity and high voltage platform, and are currently t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00H01M4/485H01M4/505H01M4/525H01M10/0525
CPCC01G53/006C01P2002/72C01P2004/03C01P2006/11C01P2006/40H01M4/485H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 钟辉
Owner SICHUAN UNION SHINE NEW ENERGY SCI TECH CO LTD
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