Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of synthetic method of positive electrode material of lithium ion battery

A lithium-ion battery and cathode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of slow nucleation rate and larger primary particle size, improve production efficiency, facilitate mass production, The effect of reducing particle growth time

Active Publication Date: 2018-08-10
SHANDONG YUHUANG NEW ENERGY TECH +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the contrary, when the pH is lowered, the crystal nucleation rate is inhibited, the nucleation rate is slow, and the size of the primary particle growth becomes larger

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
  • A kind of synthetic method of positive electrode material of lithium ion battery
  • A kind of synthetic method of positive electrode material of lithium ion battery
  • A kind of synthetic method of positive electrode material of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a 10L reactor, control the nitrogen ventilation rate to 200mL / min to remove oxygen in and above the solution, stir at 1000rpm and control the temperature in the kettle to 50°C.

[0023] Configure a 3M metal ion aqueous solution, in which the molar ratio of nickel sulfate: cobalt sulfate: manganese sulfate is 5:2:3, and then enter the reaction kettle at a speed of 10mL / min, while the aqueous sodium hydroxide solution is figure 1 The set pH value is automatically added to the kettle by the automatic equipment controlled by the program. The pH value at the beginning of the reaction is set to 10, and the pH value is controlled to increase linearly. The pH value change rate V is , the reaction time is 26h, and at the same time, the ammonia solution is continuously pumped into the reaction kettle to maintain the required constant ammonia concentration in the kettle.

[0024] The synthesized precursor was sintered in two steps to prepare the desired positive electrode mate...

Embodiment 2

[0026] In a 10L reactor, control the nitrogen ventilation rate to 200mL / min to remove oxygen in and above the solution, stir at 1000rpm and control the temperature in the kettle to 50°C.

[0027] Configure a 3M metal ion aqueous solution, in which the molar ratio of nickel sulfate: cobalt sulfate: manganese sulfate is 5:2:3, and then enter the reaction kettle at a speed of 10mL / min, while the aqueous sodium hydroxide solution is figure 2 The set pH value is automatically added to the kettle by the automatic equipment controlled by the program. The pH value at the beginning of the reaction is set to 12.5, and the pH value is controlled to decrease linearly. The pH value change rate V is , the reaction time is 26h, and at the same time, the ammonia solution is continuously pumped into the reaction kettle to maintain the required constant ammonia concentration in the kettle.

[0028] The synthesized precursor was sintered in two steps to prepare the desired positive electrode m...

Embodiment 3

[0030] In a 10L reactor, control the nitrogen ventilation rate to 200mL / min to remove oxygen in and above the solution, stir at 1000rpm and control the temperature in the kettle to 50°C.

[0031] Configure a 3M metal ion aqueous solution, in which the molar ratio of nickel sulfate: cobalt sulfate: manganese sulfate is 6:2:2, and then enter the reaction kettle at a speed of 10mL / min, while the aqueous sodium hydroxide solution is image 3 The set pH value is automatically added into the kettle by the automatic equipment controlled by the program. The pH value at the beginning of the reaction is set to 10, and the pH value is controlled to increase linearly in multiple stages. The pH change rate of the first stage is V 1 for , the reaction time is 10h; the second stage increases linearly, and the pH change rate V 2 for , the reaction time is 2h; in the third stage, the pH value increases linearly, and the pH change rate V 3 for , The reaction time is 4h. At the same time...

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

No PUM Login to View More

Abstract

Disclosed is a synthesis method for a positive electrode material of a lithium ion battery, which belongs to the technical field of positive electrode materials of lithium ion batteries. The granularity and morphology changes of precursors are regulated and controlled by controlling a linear pH value in a co-precipitation reaction. According to the synthesis method for a positive electrode material of a lithium ion battery in the present invention, a positive electrode material of a lithium ion battery is at least one of a lithium-rich manganese-based material and a ternary material. The synthesis method involves a pH value in a kettle being controlled to linearly change with ti me or the volume of added salting-in liquid within any one or a plurality of time periods △t in the co-precipitation process, such that the growth speed of primary particles and secondary particles is controlled to linearly change, making primary particle s have a growth speed changing in a gradated manner from the inside of the particles to the outside of the particles, achieving the aim of controlling the electromechanical performance, facilitating batch production, and having widespread prospects of large-scale application.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery cathode materials, in particular to a synthesis method of lithium ion battery cathode materials. Background technique [0002] The chemical co-precipitation method is the most widely used in the liquid-phase chemical synthesis of powder materials. Generally, an appropriate precipitant is added to the raw material liquid, so that the components that have been mixed uniformly in the solution are co-precipitated according to the stoichiometric ratio, or in the An intermediate product is first reacted and precipitated in the solution, and then calcined and decomposed to prepare the target product. The particle size and shape of the product can be regulated according to the experimental conditions, and the effective components in the product can be uniformly mixed at the atomic and molecular levels. The equipment is simple and the operation is easy. [0003] In the traditional chemical co-...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 牛龙伟张会斌赵洪东王瑛赵成龙张盈盈赵宝娜袁亚彬
Owner SHANDONG YUHUANG NEW ENERGY TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com