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

Lithium-rich manganese-based anode material for lithium ion battery and preparation method

A lithium-rich manganese-based lithium, ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as poor conductivity, rate performance bottlenecks, and decreased lattice order, achieving long service life, preparation The effect of simplifying the process and improving the rate performance

Inactive Publication Date: 2014-12-10
QINGDAO QIANYUN HIGH TECH NEW MATERIAL
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of lithium-rich manganese-based lithium-ion battery cathode material itself has poor conductivity, so that the performance under high-current charging and discharging is still not ideal, and it cannot meet the requirements of practical applications.
In particular, due to the existence of the Li2MnO3 phase with low conductivity and the decrease in the lattice order generated during the first activation process, the transport of lithium ions is affected, so the rate performance of this type of lithium-rich manganese-based lithium-ion battery cathode material has become One of the bottlenecks of its practical application

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The preparation process of the lithium-rich manganese-based lithium-ion battery positive electrode material of the present invention consists of the following steps: 1) first dissolving metal lithium salt, nickel salt, manganese salt and cobalt salt in deionized water, mixing to form a transparent solution, and then adding Add sucrose to the transparent solution, stir until it is transparent, then heat the solution, continuously stir and evaporate to remove the water in the solution, first form a sol, and finally obtain a gel; Calcining for 2h-4h to remove the organic components, and then calcining for the second time at 800°C-900°C for 15h-20h after grinding, to obtain the lithium-rich manganese-based lithium ion battery cathode material.

[0012] The added amount of the sucrose is 15% of the total molar weight of the total metal ions in the transparent solution.

[0013] The solution was heated to 75°C.

Embodiment 2

[0015] The preparation process of the lithium-rich manganese-based lithium-ion battery positive electrode material of the present invention consists of the following steps: 1) first dissolving metal lithium salt, nickel salt, manganese salt and cobalt salt in deionized water, mixing to form a transparent solution, and then adding Add sucrose to the transparent solution, stir until it is transparent, then heat the solution, continuously stir and evaporate to remove the water in the solution, first form a sol, and finally obtain a gel; Calcining for 2h-4h to remove the organic components, and then calcining for the second time at 800°C-900°C for 15h-20h after grinding, to obtain the lithium-rich manganese-based lithium ion battery cathode material.

[0016] The added amount of the sucrose is 25% of the total molar weight of the total metal ions in the transparent solution.

[0017] The solution was heated to 85°C.

[0018] Compared with the traditional co-precipitation method, ...

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 discloses a lithium-rich manganese-based anode material for a lithium ion battery, and a preparation method. The preparation process comprises the following steps: (1) metal lithium salt, nickel salt, manganese salt and cobalt salt are dissolved in deionized water and mixed to form a transparent solution, sucrose is added into the transparent solution, the solution is agitated to be transparent and then is heated, agitation is performed continuously for evaporation, water in the solution is removed, so that sol is formed firstly, and gel is obtained finally; (2) the gel is subjected to primary calcination at 500 DEG C-550 DEG C for 2h-4h to remove organic ingredients, and then the gel subjected to primary calcination is subjected to secondary calcination at 800 DEG C-900 DEG C for 15h-20h after being ground, the preparation process is greatly simplified, the temperature, the pH value, the feeding speed and the like of a co-precipitation system are not required to be controlled precisely, the contact between primary particles is improved efficiently, and the rate capability of the material is improved.

Description

technical field [0001] The invention relates to the field of positive electrode materials for lithium ion batteries, in particular to the positive electrode materials and preparation methods of lithium-rich manganese-based lithium ion batteries. Background technique [0002] Lithium-ion batteries have been widely used in mobile phones, cameras, notebook computers, portable appliances, etc. Compared with traditional secondary batteries, lithium-ion batteries have the advantages of high platform voltage (about 3.2-3.7V), high energy density, and no memory effect. The early commercial production of lithium-ion batteries mainly uses LiCoO2 as the positive electrode material. LiCoO2 has high capacity and good stability, but this positive electrode material has performance, economic and environmental problems, and people need to develop new ones. The cathode material system is used to meet people's needs for energy density, power density, safety, and low cost of energy storage ba...

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 Applications(China)
IPC IPC(8): H01M4/136H01M4/1397
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 孙琦李岩孙慧英
Owner QINGDAO QIANYUN HIGH TECH NEW MATERIAL
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