Preparation method of layered quaternary positive electrode material of lithium ion battery

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of general discharge capacity of quaternary materials, large percentage of irreversible capacity, affecting the morphology and capacity of materials, and achieve the first irreversible capacity. Low percentage, low percentage of irreversible capacity, effect of reducing time cost and energy cost

Pending Publication Date: 2022-04-26
GUANGDONG UNIV OF TECH
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quaternary material prepared by this method has a general discharge capacity and a large percentage of the first irreversible capacity.
At the same time, the calcination time in the preparation process is too long, and the calcination temperature is not suitable, which leads to poor crystal morphology of the material and a dec

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of layered quaternary positive electrode material of lithium ion battery
  • Preparation method of layered quaternary positive electrode material of lithium ion battery
  • Preparation method of layered quaternary positive electrode material of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1 Preparation of a layered quaternary cathode material for lithium-ion batteries

[0029] According to Figure 1 The process flow diagram uses soluble metal salts as raw materials to prepare a four-way cathode material LiNi with a layered structure by co-precipitation method 0.6 Co 0.08 Mn 0.24 Fe 0.08 O 2 , the method includes the following steps:

[0030] (1) Configuration solution:

[0031] First of all, the molar ratio of the metal elements of Ni, Co, Mn, and Fe is 60:8:24:8 to accurately weigh the water-soluble nickel salt nickel tetrahydrate nickel acetate (C 4 H 14 NiO 8 ), water-soluble drill salt cobalt tetrahydrate (C 4 H 14 CoO 8 ), water-soluble manganese salt manganese tetrahydrate manganese acetate (C 4 H 14 MnO 8 ), water-soluble iron salt ferrous sulfate (FeSO) heptaceous ferrous acid (FeSO 4 ·7H 2 O), and configured with deionized water into a mixed metal solution A with a concentration of 0.6 M;

[0032] Then, with oxalic acid as the precipitant, o...

Example Embodiment

[0037] Example 2 Preparation of layered quaternary cathode material for lithium-ion batteries

[0038] According to Figure 1 The process flow diagram uses soluble metal salts as raw materials to prepare a four-way cathode material LiNi with a layered structure by co-precipitation method 0.6 Co 0.08 Mn 0.24 Fe 0.08 O 2 , the method includes the following steps:

[0039] (1) Configuration solution:

[0040] First of all, the molar ratio of the metal elements of Ni, Co, Mn, and Fe is 60:8:24:8 to accurately weigh the water-soluble nickel salt nickel tetrahydrate nickel acetate (C 4 H 14 NiO 8 ), water-soluble drill salt cobalt tetrahydrate (C 4 H 14 CoO 8 ), water-soluble manganese salt manganese tetrahydrate manganese acetate (C 4 H 14 MnO 8 ), water-soluble iron salt ferrous sulfate (FeSO) heptaceous ferrous acid (FeSO 4 ·7H 2 O), and configured with deionized water into a mixed metal solution A with a concentration of 0.4 M;

[0041] Then, with oxalic acid as the precipitant, oxa...

Example Embodiment

[0046] Example 3 Preparation of a layered quaternary cathode material for lithium-ion batteries

[0047] According to Figure 1The process flow diagram uses soluble metal salts as raw materials to prepare a four-way cathode material LiNi with a layered structure by co-precipitation method 0.6 Co 0.08 Mn 0.24 Fe 0.08 O 2 , the method includes the following steps:

[0048] (1) Configuration solution:

[0049] First of all, the molar ratio of the metal elements of Ni, Co, Mn, and Fe is 60:8:24:8 to accurately weigh the water-soluble nickel salt nickel tetrahydrate nickel acetate (C 4 H 14 NiO 8 ), water-soluble drill salt cobalt tetrahydrate (C 4 H 14 CoO 8 ), water-soluble manganese salt manganese tetrahydrate manganese acetate (C 4 H 14 MnO 8 ), water-soluble iron salt ferrous sulfate (FeSO) heptaceous ferrous acid (FeSO 4 ·7H 2 O), and configured with deionized water into a mixed metal solution A with a concentration of 0.7 M;

[0050] Then, with oxalic acid as the precipitant, o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Concentrationaaaaaaaaaa
Concentrationaaaaaaaaaa
Concentrationaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of battery positive electrode materials, and particularly relates to a preparation method of a layered quaternary positive electrode material of a lithium ion battery, which comprises the following steps: preparing soluble salts of metal elements (Ni, Co, Mn and Fe) into a mixed metal solution, adding the mixed metal solution into a solution of an oxalic acid precipitant, and uniformly stirring to obtain the layered quaternary positive electrode material of the lithium ion battery. The preparation method comprises the following steps: preparing a precursor of a novel quaternary positive electrode material by a coprecipitation method after adjusting a proper pH value, and finally calcining the precursor at high temperature to obtain a target product LiNi < 0.6 > Co < 0.08 > Mn < 0.24 > Fe < 0.08 > O < 2 >. Compared with an existing quaternary material LiNi < 0.6 > Co < 0.1 > Mn < 0.2 > Fe < 0.1 > O < 2 > preparation process, the quaternary positive electrode material LiNi < 0.6 > Co < 0.08 > Mn < 0.24 > Fe < 0.08 > O < 2 > prepared by the method disclosed by the invention is stable in structure, high in energy density and low in first irreversible capacity percentage, and has relatively good rate capability and cycle performance.

Description

technical field [0001] The invention belongs to the technical field of battery cathode materials, and in particular relates to a preparation method of a layered quaternary cathode material for a lithium ion battery. Background technique [0002] With the rapid development of science and technology and continuous economic growth, energy has become the core part of the progress of all walks of life. Batteries (including lead-acid batteries, lithium-ion batteries, nickel-cadmium batteries, etc.) play an important role in various places in people's lives, from smart electronic products such as mobile phones, cameras and notebook computers that can be seen everywhere to new energy vehicles to Large-scale energy storage equipment used by enterprises and countries needs to be applied to batteries. Among them, lithium-ion batteries have been widely developed and applied due to their advantages such as high energy density, good cycle performance, and low memory effect. The performa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525Y02E60/10
Inventor 何洁龙李军白哲黄新萍张正裕
Owner GUANGDONG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products