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Preparation method of high-tap spherical ternary cathode material precursor

A cathode material and precursor technology, applied in the field of new energy material preparation, can solve the problems of low bulk density and achieve the effect of improving high temperature performance, excellent physical and electrochemical performance, and excellent stability

Inactive Publication Date: 2011-12-14
XIAMEN TUNGSTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the ternary cathode materials reported in China are formed of irregular flaky or granular particles, and the packing density is low, which is mainly affected by the precursor of the ternary cathode material. Improving the physical and chemical properties of the precursor is particularly critical for improving the performance of the ternary cathode material.

Method used

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  • Preparation method of high-tap spherical ternary cathode material precursor
  • Preparation method of high-tap spherical ternary cathode material precursor
  • Preparation method of high-tap spherical ternary cathode material precursor

Examples

Experimental program
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Effect test

Embodiment 1

[0025] NiSO 4 , MnSO 4 , CoSO 4 According to the molar ratio of Ni: Mn: Co = 5:3:2, the nickel-manganese-cobalt mixed aqueous solution is prepared, the total concentration is 3.0 mol / liter, and the sodium hydroxide solution is prepared at 10.0 mol / liter, and the concentration is 6.0 mol / liter. Ammonia solution, use a metering pump to respectively input nickel-cobalt-manganese salt solution, sodium hydroxide solution, and ammonia solution into the pre-filled 6m 3 The volume of the reactor is carried out in the reactor. Under the protection of argon, the temperature of the reactor is controlled to be 50°C, the pH value is 11.5, the stirring speed is 180r / min, the flow rate of ammonia water is controlled, the nickel content in the mother liquor is controlled to be 200mg / L, and the liquid-solid content in the reactor is controlled to be 400g / L, the feed liquid in the reactor is discharged naturally, the feed is continuously fed for 60 hours, the feed is stopped, the material i...

Embodiment 2

[0027] Ni(NO 3 ) 2 , Mn(NO 3 ) 2 , Co(NO 3 ) 2 According to the molar ratio of Ni: Mn: Co = 8:1:1, the nickel-manganese-cobalt mixed aqueous solution is prepared, the total concentration is 2.0 mol / liter, and the potassium hydroxide solution is prepared at 5 mol / liter, and the concentration is 4 mol / liter. Mixed solution of ammonia water and 2 mol / liter ammonium bicarbonate, input the mixed solution of nickel cobalt manganese salt solution, sodium hydroxide solution, ammonia water and ammonium bicarbonate into the pre-filled 6m 3 The volume of the reactor is carried out in the reactor. Under the condition of nitrogen protection, the temperature of the reactor is controlled at 55°C, the pH value is 11.0, and the stirring speed is 240r / min. The solid content of the feed liquid is 300g / L, the feed liquid of the reactor is naturally discharged, the feed is continuously fed for 50 hours, the feeding is stopped, the material in the reactor is transferred to the aging tank, the...

Embodiment 3

[0029] NiCl 2 , MnCl 2, CoCl 2 According to the molar ratio of Ni: Mn: Co = 7:2:1, the nickel-manganese-cobalt mixed aqueous solution is prepared, the total concentration is 2.5 mol / liter, and the sodium hydroxide solution is prepared at 4 mol / liter, and the concentration is 4 mol / liter. Ammonia and 0.5 mol / liter disodium edetate mixed complexing agent solution, nickel cobalt manganese salt solution, sodium hydroxide solution, ammonia and disodium edetate mixed solution are input into Pre-filled 6m 3 The volume of the reactor is carried out in the reactor. Under nitrogen or other inert and other protective conditions, control the temperature of the reactor to 45°C, the pH value to 10.5, and the stirring speed to 150r / min, and control the flow rate of the mixed complexing agent so that the content of the mother liquor in the reactor is 100mg / L. The liquid-solid content of the medium feed is 500g / L, the feed liquid in the reactor is naturally discharged, the feed is continuo...

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Abstract

The present invention discloses a high -vibration -shaped triggea orthopedic material preparation method. Put nickel salt, cobalt salt, manganese salt and alkaline aquatic solution, complexing agent in the reactor.Synthetic spherical or spherical ternary orthopedic material front -drive body, chemical formula is NIXCOYMNZ (OH) 2,0.5 ≤ x ≤1,0≤y ≤ 0.5, 0 ≤Z ≤ 0.5, x+y+z = 1, add alkaline pH pHSurface treatment, washing dry and drying the three -yuan positive electrode material front drive body.The present invention improves the processing performance of ternary positive electrode materials, vibrating density, overcoming material capacity and stability defects. By controlling the appearance and particle size of the front -drive body, the materialization performance of the three yuan positive pole material is achieved, and the stability of the material is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of new energy materials, and in particular relates to a method for preparing a precursor of a highly-tapped spherical ternary positive electrode material. Background technique [0002] Lithium-ion batteries are a new generation of green high-energy batteries, which have the advantages of high voltage, high energy density, good cycle performance, small self-discharge, no memory effect, and wide operating temperature range. They are widely used in portable electronic devices, such as mobile phones and notebook computers. , digital cameras, MP3, MP4, etc., also have good application prospects in electric vehicles, and lithium-ion batteries have a good development background. [0003] Cathode materials are an important part of lithium-ion batteries. At present, the anode material of industrialized lithium-ion batteries is LiCoO 2 , the research is relatively mature, and the comprehensive perform...

Claims

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Application Information

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IPC IPC(8): H01M4/1391
CPCY02E60/122Y02E60/12Y02E60/10
Inventor 宋阜钱文连马跃飞曾雷英杨金洪
Owner XIAMEN TUNGSTEN
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