Precursor of polynary positive electrode material for lithium ion battery, and preparation method thereof

A lithium-ion battery and positive electrode material technology, applied in the field of lithium-ion, can solve problems such as difficult to meet people's daily use, short service life, large environmental pollution, etc., and achieve the effect of low cost, high sphericity, and complete crystal structure

Inactive Publication Date: 2013-09-04
NANTONG RESHINE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lithium-ion batteries have been widely used in portable electronic devices such as notebook computers, mobile phones, and digital cameras because of their many good characteristics, and have expanded their applications to fields such as electric vehicles and satellite aerospace; Large environmental pollution, low capacity, low safety and short service life, it is difficult to meet people's daily use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A lithium-ion battery multi-system positive electrode material precursor and its preparation method: comprising the following steps: formulating a mixed salt solution A according to the molar ratio Ni:Co:Mn:Al=0.1:0.75:0.1:0.05, making the salt solution The concentration of metal ions is 0.4mol / L; sodium hydroxide and ammonium sulfate are used as complexing agents, the concentration of sodium hydroxide solution is 6mol / L, and ammonium sulfate is 10% aqueous solution; salt solution A and ammonium sulfate are co-flowed in a certain proportion In the reaction kettle filled with pure water, the solution in the reaction kettle is constantly stirred, the flow rate of the salt solution is fixed, the reaction temperature is controlled to be 40°C, and the addition of sodium hydroxide is controlled by controlling the pH value of the solution in the reaction kettle to 10.0. The slurry flows into another container through the overflow port, and it can be aged for 4 hours; filter the...

Embodiment 2

[0019] A lithium-ion battery multi-system cathode material precursor and a preparation method thereof: comprising the following steps: preparing a mixed salt solution A according to a molar ratio of Ni:Co:Mn:Al=0.2:0.55:0.2:0.05, and making the salt solution A The concentration of metal ions is 1.2mol / L; sodium hydroxide and ammonium sulfate are used as complexing agents, the concentration of sodium hydroxide solution is 8mol / L, and ammonium sulfate is 10% aqueous solution; the salt solution A and ammonium sulfate are co-flowed in a certain proportion In the reaction kettle filled with pure water, the solution in the reaction kettle is constantly stirred, the flow rate of the salt solution is fixed, the reaction temperature is controlled to be 45°C, and the addition of sodium hydroxide is controlled by controlling the pH value of the solution in the reaction kettle to 11.0. The slurry flows into another container through the overflow port and aged for 8 hours; filter the precip...

Embodiment 3

[0021] A lithium-ion battery multi-system positive electrode material precursor and its preparation method: comprising the following steps: according to the molar ratio Ni: Co: Mn: Al = 0.25: 0.45: 0.25: 0.05 to prepare a mixed salt solution A, make the salt solution The metal ion concentration is 2mol / L; sodium hydroxide and ammonium sulfate are used as complexing agents, the concentration of sodium hydroxide solution is 12mol / L, and ammonium sulfate is 10% aqueous solution; the salt solution A and ammonium sulfate are flowed together in a certain proportion In the reaction kettle filled with pure water, the solution in the reaction kettle is constantly stirred, the flow rate of the salt solution is fixed, the reaction temperature is controlled at 50°C, and the addition of sodium hydroxide is controlled by controlling the pH value of the solution in the reaction kettle to 12.0. The material flows into another container through the overflow port, and it can be aged for 10 hours...

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Abstract

The invention discloses a precursor of a polynary positive electrode material for a lithium ion battery, and a preparation method thereof. The precursor comprises NixCo(1-x-y-z)MnyWz(OH)2 (0<x<0.3,0<y<0.3,0<z<0.1), wherein W represents one of Al , Mg, Ti, Sr, Zr and W. The preparation method comprises the following steps of preparing a mixed salt solution A according to proportions, parallel-flowing the salt solution A and ammonium sulfate according to a certain proportion into a reactor with pure water by using sodium hydroxide and ammonium sulfate as a complexing agent; stirring the solution in the reactor continuously; controlling temperature and pH value of the reaction; introducing slurry in the reactor into another container through an overflow port for ageing; filtering precipitate and drying. The precursor has high density, high sphericility and complete crystal structure. The precursor has simple synthesis process, low cost and controllable granularity, and can be industrialized easily.

Description

technical field [0001] The invention relates to the technical field of lithium ions, in particular to a precursor of a multi-component anode material for a lithium ion battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries have been widely used in portable electronic devices such as notebook computers, mobile phones, and digital cameras because of their many good characteristics, and have expanded their applications to fields such as electric vehicles and satellite aerospace; Large environmental pollution, low capacity, low safety and short service life are difficult to meet people's daily use. Contents of the invention [0003] Purpose of the invention: The purpose of the invention is to make up for the deficiencies of the prior art, and to provide a high-voltage and high-safety lithium-ion battery multi-system cathode material precursor and a preparation method thereof. [0004] Technical solution: a lithium-ion battery multi-syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00H01M4/50H01M4/52H01M4/48
CPCY02E60/10
Inventor 刘奇张新龙王梁梁朱祥陈亮
Owner NANTONG RESHINE NEW MATERIAL
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