A kind of ultra-large particle size nickel-cobalt-manganese hydroxide for energy storage and preparation method thereof

A technology of hydroxide and nickel-cobalt-manganese, applied in the direction of manganese oxide/manganese hydroxide, cobalt oxide/cobalt hydroxide, nickel oxide/nickel hydroxide, etc. It can improve the tap density, avoid particle cracking and improve the compactness.

Active Publication Date: 2020-06-23
HUAYOU NEW ENERGY TECH (QUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are problems that the particles are easy to agglomerate and the sphericity is not good, and the stirring intensity is too high. When the particle size is large, the particles are easy to crack
Chinese patent 201510815143.2 optimizes the co-precipitation reaction and prepares a tap density of 2.3g / cm 3 Precursors with a particle size of 10-50 μm above, but additional nucleating agents are required, and the nickel-cobalt-manganese precursor is composed of two primary particles with different shapes and particle sizes, which affects the uniformity of the material

Method used

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  • A kind of ultra-large particle size nickel-cobalt-manganese hydroxide for energy storage and preparation method thereof
  • A kind of ultra-large particle size nickel-cobalt-manganese hydroxide for energy storage and preparation method thereof
  • A kind of ultra-large particle size nickel-cobalt-manganese hydroxide for energy storage and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] 1. Select nickel sulfate, cobalt sulfate and manganese sulfate, and prepare a mixed metal salt solution with a total metal ion concentration of 2.5mol / L according to the molar ratio of Ni:Co:Mn of 0.55:0.20:0.25; the prepared concentration is 8.0mol / L The sodium hydroxide solution is used as a precipitating agent; the ammonia solution with a concentration of 8.0mol / L is prepared as a complexing agent.

[0036] 2. Feed nitrogen into the 5000L sealed reaction kettle with stirring and temperature control device, the flow rate is 1200L / h, add 2000L bottom liquid; the added bottom liquid is ammonia concentration of 3g / L, pH value of 12.2, temperature of 60°C aqueous solution. Start stirring, continue and feed nitrogen into the reactor for atmosphere protection, and maintain nitrogen protection during the entire reaction process, with a flow rate of 1200 L / h.

[0037]3. Add the mixed metal salt solution, sodium hydroxide solution and ammonia solution prepared in step 1 into ...

Embodiment 2

[0046] 1. Select nickel sulfate, cobalt sulfate and manganese sulfate, and prepare a mixed metal salt solution with a total metal ion concentration of 2.0mol / L according to the molar ratio of Ni:Co:Mn of 0.52:0.20:0.28; the prepared concentration is 6.0mol / L The sodium hydroxide solution is used as a precipitating agent; the ammonia solution with a concentration of 7mol / L is prepared as a complexing agent.

[0047] 2. Feed nitrogen into the 5000L sealed reaction kettle with stirring and temperature control device, the flow rate is 1800L / h, add 4000L bottom liquid; the added bottom liquid is ammonia concentration of 3g / L, pH value of 12.0, temperature of Aqueous solution at 57°C. Start stirring, continue and feed nitrogen into the reactor for atmosphere protection, and maintain nitrogen protection during the entire reaction process, with a flow rate of 1800 L / h.

[0048] 3. Add the mixed metal salt solution, sodium hydroxide solution and ammonia solution prepared in step 1 int...

Embodiment 3

[0057] 1. Select nickel sulfate, cobalt sulfate and manganese sulfate, and prepare a mixed metal salt solution with a total metal ion concentration of 2.0mol / L according to the molar ratio of Ni:Co:Mn of 0.50:0.20:0.30; the prepared concentration is 5.0mol / L The sodium hydroxide solution is used as a precipitating agent; the ammonia solution with a concentration of 5.5mol / L is prepared as a complexing agent.

[0058] 2. Feed nitrogen into the 5000L sealed reaction kettle with stirring and temperature control device, the flow rate is 2200L / h, add 3000L bottom liquid; the added bottom liquid is ammonia concentration of 4g / L, pH value of 12.2, temperature of Aqueous solution at 55°C. Start stirring, continue to feed nitrogen into the reactor for atmosphere protection, and maintain nitrogen protection during the entire reaction process, with a flow rate of 2200 L / h.

[0059] 3. Add the mixed metal salt solution, sodium hydroxide solution and ammonia solution prepared in step 1 in...

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Abstract

The invention discloses an extra-large particle size nickel-cobalt-manganese hydroxide for energy storage and a preparation method thereof. The current extra-large particle size nickel-cobalt-manganese hydroxide precursor is easy to be cracked so that the usage is affected. The chemical formula of the nickel-cobalt-manganese hydroxide is NixCoyMnz (OH) 2, wherein x+y+z is equal to 1, the x is notsmaller than 0.45 and not larger than 0.55, the y is not smaller than 0.15 and not larger than 0.25, the z is not smaller than 0.25 and not larger than 0.35, D50 ranges from 15 to 50 microns, tap density is 2.3-2.7 g / cm<3>, and no particles are cracked; the synthesis reaction is continuously carried out, a material is washed by using an all-in-one washing and filtering machine and is dried by a rotary kiln, and the dried material is demagnetized by a sieve and two sections of electromagnetic de-ironing separators to obtain the extra-large particle size nickel-cobalt-manganese hydroxide for energy storage. The preparation method can stably control the nucleation and growth speed of the seed crystal to reach an equilibrium, not only improves the compactness of the particles, but also improves the tap density of the product by controlling the particle size distribution, and also avoids the problem that the particles are cracked.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery ternary cathode material precursors, in particular to a nickel-cobalt-manganese hydroxide with a super-large particle size for energy storage and a preparation method thereof. Background technique [0002] Energy storage technology can balance the relationship between energy supply and demand, is compatible with a large number of renewable energy sources, and effectively solves the problems of abandoning wind, water, and light. It has been widely used in the four major links of power generation, transmission, distribution, and power consumption. component. [0003] Lithium-ion battery is an electrochemical energy storage device, which has the advantages of high energy density, high energy conversion efficiency, and long cycle life. After years of development, it has been widely used in energy storage power stations. In 2017, the installed capacity of electrochemical energy storage projects newl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/50H01M4/52H01M10/0525C01G53/04C01G51/04C01G45/02
CPCC01G45/02C01G51/04C01G53/04H01M4/50H01M4/52H01M10/0525Y02E60/10
Inventor 李肖萌沈震雷崔玉听项志峰郭美鑫陈要忠
Owner HUAYOU NEW ENERGY TECH (QUZHOU) CO LTD
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