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Cobalt-free nickel-manganese positive electrode material and preparation method and application thereof

A positive electrode material, nickel-manganese technology, applied in the field of cobalt-free nickel-manganese positive electrode material and its preparation, can solve the problems of less layered nickel-manganese positive electrode material, price fluctuation and high cost, and achieves inhibition of cation dissolution, reduction of preparation cost, The effect of improving the service life

Active Publication Date: 2021-07-23
GUANGDONG BRUNP RECYCLING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]Currently, the positive electrode material with higher energy density on the market is the nickel-cobalt-manganese ternary positive electrode material, but because the nickel-cobalt-manganese ternary positive electrode material contains cobalt, and cobalt It is a scarce resource, and the price of cobalt shows an increasing trend, which makes the price of positive electrode materials fluctuate greatly with the cobalt content. The problem of high cost, secondly, there are few reports on layered nickel-manganese cathode materials in the market, especially cobalt-free cathode materials with low and medium nickel content

Method used

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  • Cobalt-free nickel-manganese positive electrode material and preparation method and application thereof
  • Cobalt-free nickel-manganese positive electrode material and preparation method and application thereof
  • Cobalt-free nickel-manganese positive electrode material and preparation method and application thereof

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Embodiment 1

[0040] The cobalt-free layered nickel-manganese positive electrode material (Li 1.06 Ni 0.6 mn 0.3974 Me 0.0026 o 2 @(Al 2 o 3 ) 0.001 ·(TiO 2 ) 0.0015 ) preparation method, the concrete steps are as follows:

[0041] (1) NiSO 4 with MnSO 4 According to the molar ratio of Ni: Mn = 6:4, it was configured as a solution A of 2.5mol / L, placed in a reaction stirred tank and stirred at a stirring speed of 25rpm / min, and then sodium hydroxide and ammonia water were mixed at a pressure of 5m 3 / h flow rate into the prepared A solution, the reaction temperature is 55 ° C ~ 60 ° C, the reaction time is 2 h, after the reaction is completed, use deionized water to wash, place in a centrifuge for filtration, and the centrifugal speed is 600 rpm / min. The centrifugation time is 90min, and then dried at 150°C for 4h, and finally the cobalt-free nickel manganese hydroxide precursor Ni 0.6 mn 0.4 (OH) 2 ;

[0042] (2) The above-mentioned cobalt-free nickel-manganese hydroxide pre...

Embodiment 2

[0052] The cobalt-free layered nickel-manganese positive electrode material (Li 1.04 Ni 0.6 mn 0.3969 Me 0.0031 o 2 @(Al 2 o 3 ·TiO 2 ) 0.001 ·(Li 2 WO 4 ) 0.0015 ) preparation method, the concrete steps are as follows:

[0053] (1) NiSO 4 with MnSO 4 According to the molar ratio of Ni:Mn=6:4, it is configured into 2.3mol / L solution A, placed in a reaction stirred tank and stirred, the stirring speed is preferably 30rpm / min, and then sodium hydroxide and ammonia water are mixed at a pressure of 6.3m 3 / h flow rate into the prepared A solution, the reaction temperature is 50 ° C ~ 55 ° C, the reaction time is 2.5 h, after the reaction is completed, it is washed with deionized water, placed in a centrifuge for filtration, and the centrifugal speed is 600 rpm / min. The centrifugation time is 90min, and then dried at 150°C for 4h, and finally the cobalt-free nickel manganese hydroxide precursor Ni 0.6 mn 0.4 (OH) 2 ;

[0054] (2) The above-mentioned cobalt-free nic...

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Abstract

The invention belongs to the technical field of battery materials, and discloses a cobalt-free layered nickel-manganese positive electrode material and a preparation method and application thereof. The chemical formula of the cobalt-free layered nickel-manganese positive electrode material is LiaNixMnyMezO2@Mb, wherein Me is at least one of Zr, Al, W, Sr, Ti or Mg; and M is at least one of Al2O3, CeO2, TiO2, Yb2O3, Nb2O5, La2O3, WO3, titanium sol, aluminum sol, titanium aluminum sol, aluminum isopropoxide, butyl titanate, dialuminum hydrogen phosphate or lithium tungstate. Shallow layer coating is achieved through high-temperature sintering after metal oxide coating, and the shallow layer coating of the material is beneficial for preventing microcrack expansion caused by material structure change and internal stress change in the charging and discharging process in the circulation process of the material.

Description

technical field [0001] The invention belongs to the technical field of battery materials, and in particular relates to a cobalt-free nickel-manganese positive electrode material and a preparation method and application thereof. Background technique [0002] At present, the positive electrode material with higher energy density in the market is the nickel-cobalt-manganese ternary positive electrode material, but because the nickel-cobalt-manganese ternary positive electrode material contains cobalt, and cobalt is a scarce resource, the price of cobalt shows an increasing trend, which makes the positive electrode The price of materials fluctuates greatly with the cobalt content, so the development of cobalt-free cathode materials will become a trend in the future, which can reduce the problem of high cost of cathode materials due to the price of cobalt. Secondly, the market for layered nickel-manganese cathode materials There are few reports, especially for cobalt-free cathode...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/505H01M4/525H01M10/0525
CPCH01M4/628H01M4/505H01M4/525H01M10/0525H01M2004/028H01M2004/021Y02E60/10C01G53/50H01M4/366H01M4/1391H01M4/131C01P2002/74C01P2004/03C01P2004/51C01P2004/61C01P2006/12C01P2006/40
Inventor 黄东李长东汪乾刘婧婧阮丁山
Owner GUANGDONG BRUNP RECYCLING TECH
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