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Preparation method of quadrivalent cation-doped nickel-cobalt-manganese ternary material

A technology of tetravalent cations and ternary materials, which is applied in the field of battery electrode material preparation, can solve problems such as difficulty in consistent chemical composition of samples at room temperature, incomplete precipitation of nickel and cobalt ions, and large differences in precipitation conditions, achieving excellent discharge performance, The effect of good consistency and low raw material cost

Active Publication Date: 2018-01-12
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest problem with this method is that the precipitation conditions of the hydroxide co-precipitation produced by nickel, cobalt and manganese are quite different. If the amount of alkali used in the precipitation process is insufficient, then the nickel and cobalt ions may not be completely precipitated; if the precipitation process If the amount of alkali used is too much, then the precipitated manganese ions may be dissolved, making it difficult for the prepared samples to have consistent chemical composition and performance at room temperature.
However, the actual improvement effect is not obvious at present

Method used

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  • Preparation method of quadrivalent cation-doped nickel-cobalt-manganese ternary material
  • Preparation method of quadrivalent cation-doped nickel-cobalt-manganese ternary material
  • Preparation method of quadrivalent cation-doped nickel-cobalt-manganese ternary material

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Experimental program
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Embodiment 1

[0050] Nickel acetate, cobalt acetate, manganese carbonate, lithium hydroxide and zirconium dioxide were weighed according to the molar ratio of nickel, cobalt, manganese, lithium, and doped zirconium ions of 0.5:0.19:0.3:1.05:0.01. Mixture 1 is obtained by mixing nickel acetate, cobalt acetate, manganese carbonate and zirconium dioxide. Add 30 times the volume of deionized water of the total volume of mixture 1, mix well, then add ammonia water dropwise until the acidity of the solution is pH 11.5, add weighed lithium hydroxide, mix well by ball milling equipment, and age in a nitrogen atmosphere at 66°C After 20 hours, the precursor 2 was prepared. Precursor 2 was heated at 200°C under a vacuum condition of 0.1 atmosphere pressure to prepare dry precursor 3. Precursor 3 was placed in oxygen-enriched air with an oxygen volume content of 90%, heated from room temperature to 850 °C at a rate of 1 °C / min, and cooled to room temperature to prepare a layered α-NaFeO 2 Structured...

Embodiment 2

[0053] Nickel oxide, cobalt nitrate, manganese carbonate, lithium oxide and zirconium dioxide were respectively weighed according to the molar ratio of nickel, cobalt, manganese, lithium, and doped zirconium ions of 0.47:0.17:0.30:0.95:0.06. Mixture 1 is obtained by mixing nickel oxide, cobalt nitrate, manganese carbonate and zirconium dioxide. Add 1 times the volume of distilled water of the total volume of mixture 1, mix evenly, then add ammonia water dropwise to pH 12.5, add weighed lithium oxide, mix evenly through sand milling equipment, and age in an argon atmosphere at 60°C After 20 hours, Precursor 2 was prepared. Precursor 2 was spray-dried at 180°C to prepare dry precursor 3. Precursor 3 was placed in oxygen-enriched air with an oxygen volume content of 99%, programmed to heat from room temperature to 880 °C at a rate of 3 °C / min, and cooled to room temperature to prepare a layered α-NaFeO 2 Structured zirconium-doped ternary cathode material.

[0054] The ternary...

Embodiment 3

[0056] Nickel nitrate, cobalt acetate, manganese carbonate, lithium nitrate and germanium nitrate were respectively weighed according to the molar ratio of nickel, cobalt, manganese, lithium and doped germanium ions of 0.52:0.22:0.20:1.10:0.06. Mixture 1 is obtained by mixing nickel nitrate, cobalt acetate, manganese carbonate and germanium nitrate. Add methanol 50 times the volume of the total volume of mixture 1, mix well, then add ammonia water dropwise until the acidity of the solution is pH 9.5, add weighed lithium nitrate, mix well through a ball mill, and age in a helium atmosphere at 90°C for 48 hour, prepare precursor 2. Precursor 2 was heated at 280°C under a vacuum condition of 0.9 atmospheres to prepare dry precursor 3. Precursor 3 was placed in an oxygen-enriched air atmosphere with an oxygen volume content of 30%, heated from room temperature to 770 °C at a rate of 0.01 °C / min, and cooled to room temperature to obtain a layered α-NaFeO 2 Structured germanium-do...

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Abstract

The invention relates to a preparation method of a quadrivalent cation-doped nickel-cobalt-manganese ternary material. The preparation method is characterized in that a tetravalent ion-doped compoundis zirconium tetrachloride, zirconium oxychloride, zirconium dioxide, zirconium carbonate, basic zirconium chloride, zirconium acetate, ammonium zirconium carbonate, zirconium nitrate phosphite, Ge(OH)2, Ge(OH)4, germanium oxide, germanium chloride or germanium nitrate. Nickel, cobalt, manganese and the tetravalent ion-doped compound are mixed, and a dry precursor is prepared through wet grinding,ammonia water adding, lithium compound adding, aging, drying and other steps and then is placed in oxygen-enriched air or a pure oxygen atmosphere, and the quadrivalent cation-doped nickel-cobalt-manganese ternary cathode material is prepared by adopting a programmed heating method or a gradual heating zone heating method.

Description

technical field [0001] The invention belongs to the technical field of battery electrode material preparation, and relates to a method for nickel-cobalt-manganese ternary materials doped with tetravalent cations that can be used in lithium batteries, lithium ion batteries, polymer batteries and supercapacitors. technical background [0002] With the depletion of fossil energy, energy issues have increasingly become a focus of attention. Finding new materials for energy storage has become one of the research hotspots. The lithium-ion battery of the new energy storage system should have the advantages of high voltage, large capacity, no memory effect and long life, and can be widely used in digital products such as mobile phones, digital cameras, notebook computers, and power tools such as electric vehicles and hybrid electric vehicles . [0003] Lithium-ion batteries include positive electrode materials, negative electrode materials, separators, electrolytes, and current co...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCY02E60/10
Inventor 童庆松曾观音李青海郑思宁马莎莎余欣瑞
Owner FUJIAN NORMAL UNIV
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