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Multi-element anode lithium battery material suitable for high voltage and preparation method for material

A positive electrode material, high voltage technology, applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of aggravated electrolyte reaction, poor cycle performance, cycle performance deterioration, etc., to suppress side reactions, facilitate popularization and application, and produce low cost effect

Inactive Publication Date: 2014-01-01
CHENGDU JINGYUAN NEW MATERIALS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, nickel-cobalt lithium manganese oxide multi-element cathode material still has its own defects, especially under high voltage, the interface has poor compatibility with the electrolyte due to the presence of free lithium, resulting in poor cycle performance, and the existing lithium-ion multi-element anode Most of the materials are polycrystalline structures, and the structure is unstable under high voltage, which intensifies the reaction with the electrolyte and deteriorates the cycle performance
Therefore, the patent number is CN200810046300.8, which discloses "a nickel-cobalt-manganese multi-component doped lithium-ion battery positive electrode material and its preparation method", which prepares a non-agglomerated single-particle material and improves the stability of the particles for charging and discharging under high voltage. , but still deteriorates the cycle due to the layered structure and residual free lithium on the surface

Method used

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  • Multi-element anode lithium battery material suitable for high voltage and preparation method for material
  • Multi-element anode lithium battery material suitable for high voltage and preparation method for material
  • Multi-element anode lithium battery material suitable for high voltage and preparation method for material

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Experimental program
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Effect test

Embodiment 1

[0026] Dissolve nickel sulfate containing 19.57g of Ni element, cobalt sulfate containing 19.64g of Co element, manganese sulfate containing 18.18g of Mn element, and 0.53g of titanium nitrate containing Ti element in 1L of pure water, stir and dissolve, and configure the total A multi-element metal salt solution with a metal molar concentration of 1.0 mol / L, the molar ratio of nickel, cobalt and manganese in the solution is Ni:Co:Mn=5:2:3.

[0027] The above solution was heated to 70°C, and was added into 1.7L alkaline solution under stirring condition to carry out the reaction. The alkaline solution NH 3 The NaOH content is 0.6mol / L, and the NaOH content is 0.8mol / L. Adjust the pH value to 8.5, continue to stir for 1 hour after the feeding, and filter after standing for 2 hours to obtain solid matter, wash the material with pure water, and then dry it in an oven at 110°C for 5 hours to obtain the intermediate of Ti-doped multi-component positive electrode material .

[00...

Embodiment 2

[0031] Dissolve nickel nitrate containing 29.35g of Ni element, cobalt nitrate containing 11.74g of Co element, manganese nitrate containing 16.48g of Mn element and titanium nitrate containing 0.57g of Ti element in 1.5L of pure water, stir to dissolve, and configure the total A multi-element metal salt solution with a metal molar concentration of 1.5 mol / L, the molar ratio of nickel, cobalt and manganese in the solution is Ni:Co:Mn=5:2:3.

[0032]Heat the above solution to 50°C, and add it into 1.5L alkaline solution under stirring condition for reaction. The alkaline solution NH 3 The NaOH content is 0.4mol / L, and the NaOH content is 0.9mol / L. Adjust the pH value to 8.0, continue to stir for 4 hours after the addition, and filter after standing for 2 hours to obtain a solid. Wash the material with pure water, and then dry it in an oven at 110° C. for 5 hours to obtain a composite multi-component intermediate.

[0033] Combine the composite multi-component intermediate with...

Embodiment 3

[0036] Dissolve nickel chloride containing 29.47g of Ni element, cobalt chloride containing 11.72g of Co element, manganese chloride containing 16.52g of Mn element and magnesium nitrate containing 0.12g of Mg element in 1.2L of pure water, stir to dissolve, It is configured as a multi-element metal salt solution with a total metal molar concentration of 1.2mol / L, and the molar ratio of nickel, cobalt and manganese in the solution is Ni:Co:Mn=5:2:3.

[0037] Heat the above solution to 60°C, add it into 2L alkaline solution under stirring condition, and carry out the reaction. The alkaline solution NH 3 The content is 0.2mol / L, and the NaOH content is 0.5mol / L. Adjust the pH value to 9.0, continue to stir for 3 hours after the addition, and filter after standing for 2 hours to obtain a solid, wash the material with pure water, and then dry it in an oven at 110°C for 5 hours to obtain a composite multi-component intermediate.

[0038] Combine the composite multi-component inter...

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Abstract

The invention provides a multi-element anode lithium battery material suitable for high voltage, and a preparation method for the material. The multi-element anode lithium battery material has the feature of a single-particle structure, and the particle size distribution is within the range of 0.5-15 mum; the chemical formula of the nickel-cobalt-manganese multi-element lithium battery anode material with composite doping elements is LiNiXCoyMnzMaNbO2, wherein the value range of x, y and z is that: x is not smaller than 0.2 and not larger than 0.9, y is not smaller than 0 and not larger than 0.4, z is not smaller than 0.1 and not larger than 0.5, 1-x-y-z equals to a+b, is larger than 0, and is not larger than 0.05, M is any one selected from titanium, aluminum, ferrum, vanadium, silicium, fluorine, lanthanide and actinide elements, and N is any one selected from calcium, magnesium, aluminum, zirconium, ferrum and titanium. Based on the preparation of the single-particle multi-element lithium battery anode material, the method of compositing specific doping elements is adopted, the structural stability under high voltage charge and discharge is improved and the cycle performance of the material is effectively improved without changing the electrochemical performance of the material.

Description

technical field [0001] The invention relates to the field of preparation of positive electrode materials for lithium ion batteries, in particular to a multi-element positive electrode lithium battery material suitable for high voltage and a preparation method thereof. [0002] Background technique [0003] At present, lithium-ion batteries are widely used in portable electronic devices such as mobile phones, notebook computers, and digital cameras due to their high voltage, high energy density, and long cycle life. In recent years, various electronic products have gradually developed towards miniaturization, intelligence and functional diversification, which put forward higher requirements for the energy density of lithium-ion batteries. [0004] Increasing the charging voltage of the battery can significantly increase the capacity of the battery without increasing the active material in the battery, and is one of the most effective ways to increase the energy density of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/62
CPCY02E60/12H01M4/505H01M4/525H01M4/628Y02E60/10
Inventor 高玉煙徐频石谦陈东州林宁
Owner CHENGDU JINGYUAN NEW MATERIALS TECH
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