Preparation method of manganese-based compound positive pole material for secondary lithium ion battery

A composite positive electrode material and lithium-ion battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as acceleration, slow decomposition, and active material dissolution, and achieve low raw material costs, simple process routes, and high energy density. Effect

Inactive Publication Date: 2012-12-12
济宁市无界科技有限公司
View PDF3 Cites 38 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The open circuit voltage of the battery in the charging state is generally about 4V. Under this high voltage, the electrolyte itself will slowly decompose, and the positive electrode material in the charging state is a strong oxidant, which can catalyze and accelerate the oxidative decomposition of the electrolyte; In the charged state, due to the release of a large number of lithium ions, the structure of t

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 manganese-based compound positive pole material for secondary lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] (1) Take Li 2 CO 3 , MnO 2 , Mn 3 O 4 , Nb 2 O 5 , Sb 2 O 3 Weigh according to the molar ratio of 0.545:0.88:0.333:0.01:0.005;

[0027] (2) Prepare a polyethylene glycol (PEG) solution with a concentration of 0.1% by mass;

[0028] (3) Mixed treatment: press Li 2 CO 3 +Nb 2 O 5 +Sb 2 O 3 :Aluminum ball: 0.1% polyethylene glycol (PEG) solution = 1:2:1 after weighing, put it into an inclined ball mill and mix for 3h, then bake it at 300℃ for 10h for drying treatment. Then with MnO 2 , Mn 3 O 4 Then put them into the inclined ball mill with aluminum ball media and mix and grind for 4 hours;

[0029] (4) Roasting: Put the uniformly mixed materials into the sintering sagger and send them into the continuous sintering roller tunnel kiln. The temperature curve is to increase the temperature at a heating rate of 300℃ per hour. When the temperature reaches 400℃, it will be roasted at a constant temperature. 2h, then heat up again, when the temperature reaches 720℃, r...

Example Embodiment

[0032] Example 2

[0033] (1) Take Li 2 CO 3 , MnO 2 , Mn 3 O 4 , Nb 2 O 5 , Ga 2 O 3 Weigh according to the molar ratio of 0.545:0.68:0.4:0.005:0.01;

[0034] (2) Prepare a polyethylene glycol (PEG) solution with a concentration of 0.1% by mass;

[0035] (3) Mixed treatment: press Li 2 CO 3 +Nb 2 O 5 +Ga 2 O 3 :Aluminum ball: 0.1% polyethylene glycol (PEG) solution = 1:2:1 after weighing, put it into an inclined ball mill and mix for 3h, then bake it at 300℃ for 10h for drying treatment. Then with MnO 2 , Mn 3 O 4 Then put them into the inclined ball mill with aluminum ball media and mix and grind for 4 hours;

[0036] (4) Roasting: Put the uniformly mixed materials into the sintering sagger and send them into the continuous sintering roller tunnel kiln. The temperature curve is to increase the temperature at a heating rate of 300℃ per hour. When the temperature reaches 400℃, it will be roasted at a constant temperature. 2h, then heat up again, when the temperature reaches 720℃, roa...

Example Embodiment

[0039] Example 3

[0040] (1) Take Li 2 CO 3 , MnO 2 , Mn 3 O 4 , Nb 2 O 5 , Ga 2 O 3 Weigh according to the molar ratio of 0.545:0.98:0.3:0.005:0.01;

[0041] (2) Prepare a polyethylene glycol (PEG) solution with a concentration of 0.1% by mass;

[0042] (3) Mixed treatment: press Li 2 CO 3 +Nb 2 O 5 +Ga 2 O 3 :Aluminum ball: 0.1% polyethylene glycol (PEG) solution = 1:2:1 after weighing, put it into an inclined ball mill and mix for 3h, then bake it at 300℃ for 10h for drying treatment. Then with MnO 2 , Mn 3 O 4 Then put them into the inclined ball mill with aluminum ball media and mix and grind for 4 hours;

[0043] (4) Roasting: Put the uniformly mixed materials into the sintering sagger and send them into the continuous sintering roller tunnel kiln. The temperature curve is to increase the temperature at a heating rate of 300℃ per hour. When the temperature reaches 400℃, it will be roasted at a constant temperature. 2h, then heat up again, when the temperature reaches 720℃, roa...

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

The invention provides a preparation method of a manganese-based compound positive pole material for a secondary lithium ion battery. The general constitution formula of the positive pole material is Li (LixMn2-x-yMy) O4/Az, wherein x is more than or equal to 0 and less than or equal to 0.5, y is more than or equal to 0 and less than or equal to 2, and z is more than or equal to 0 and less than or equal to 0.5; and M is a doped modified element, and A is an oxide of a coating element or a phthalocyanines large-ring transition metal complex. When the positive pole material is prepared, a lithium source and an M source are added into mixing equipment containing a medium and a dispersing agent to be mixed and dried; then the mixture and a manganese source are added into the mixing equipment containing the medium and the dispersing agent to be mixed and dried; then the new mixture is roasted and then is cooled to a room temperature; and the new mixture and an A source are added into the mixing equipment containing the medium and the dispersing agent to be mixed and dried, are roasted again, are cooled to the room temperature and are mixed and crushed to obtain the manganese-based compound positive pole material. The preparation method disclosed by the invention has the advantages of simple process, low raw material cost and processing cost, simple process route, short period and low energy consumption. The produced manganese-based compound positive pole material has the advantages of high energy density, mass specific capacity, power performance, high-temperature circulating performance and high-temperature storage performance; and the capacity efficiency of the material is high at -40 DEG C.

Description

technical field [0001] The invention relates to a method for preparing a positive electrode material for a secondary lithium ion battery, in particular to a method for preparing a manganese-based composite positive electrode material for a secondary lithium ion battery. Background technique [0002] Traditional secondary batteries mainly include lead-acid batteries, cadmium-nickel batteries, nickel-metal hydride batteries, etc., which cannot meet the market demand well due to problems such as low energy density and environmental pollution. According to the needs of social development, its application scope will become wider and wider. With the continuous expansion of the application field of lithium-ion batteries, countries all over the world, especially the governments of developed countries, and group companies are investing heavily in technology research and development and market applications. Lithium-ion battery applications range from mobile phones, notebook computers...

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): H01M4/505H01M4/1391
CPCY02E60/122Y02E60/10
Inventor 蒋永乐蒋永善
Owner 济宁市无界科技有限公司
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap