Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation and application of zirconium dioxide coated lithium manganate positive electrode material

A positive electrode material, zirconium dioxide technology, applied in the field of electrochemistry, can solve the problems of poor structural stability of lithium manganate positive electrode materials, poor high-temperature cycle performance of batteries, and complexity, so as to improve electrochemical performance and structural stability , regular shape effect

Pending Publication Date: 2022-04-05
安徽博石高科新材料股ふん有限公司
View PDF12 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method to solve the problems that the existing lithium manganate coating modification process proposed in the above background technology is relatively complicated, the structure stability of lithium manganate positive electrode material is not good, and the high-temperature cycle performance of the battery is poor.

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 and application of zirconium dioxide coated lithium manganate positive electrode material
  • Preparation and application of zirconium dioxide coated lithium manganate positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A kind of application of lithium manganate cathode material coated with zirconium dioxide, comprises the following steps:

[0051] Select LiMn1.95Al0.05O3.8F0.2@xZrO2 material with ZrO2 coating amount of 1%, and then mix the positive electrode material, acetylene black and PVDF according to the mass ratio of 8:1:1, and add an appropriate amount of solvent N-methylpyrrolidone solution Slurry. It was uniformly coated on a 20 μm thick aluminum foil, and then vacuum-dried at 120° C. for 6 h. Punch out composite electrode discs with a diameter of 12.0 mm with a tablet press. The obtained disc was used as the positive electrode, the metal lithium sheet was used as the negative electrode, Celgard-2400 was used as the diaphragm, and the 1mol / LLiPF6 (EC+DMC) (volume ratio was 1:1) mixture was used as the electrolyte, and the argon-filled glove box was used to Assemble the CR2025 button battery, and then use the LANDCT2001A battery test system to conduct charge and discharge te...

Embodiment 2

[0053] A kind of application of lithium manganate cathode material coated with zirconium dioxide, comprises the following steps:

[0054] Select the LiMn1.95Al0.05O3.8F0.2@xZrO2 material with a ZrO2 coating amount of 3%, then mix the positive electrode material, acetylene black and PVDF according to the mass ratio of 8:1:1, and add an appropriate amount of solvent N-methylpyrrolidone solution Slurry. It was uniformly coated on a 20 μm thick aluminum foil, and then vacuum-dried at 120° C. for 6 h. Punch out composite electrode discs with a diameter of 12.0 mm with a tablet press. The obtained disc was used as the positive electrode, the metal lithium sheet was used as the negative electrode, Celgard-2400 was used as the diaphragm, and the 1mol / LLiPF6 (EC+DMC) (volume ratio was 1:1) mixture was used as the electrolyte, and the argon-filled glove box was used to Assemble the CR2025 button battery, and then use the LANDCT2001A battery test system to conduct charge and discharge ...

Embodiment 3

[0056] A kind of application of lithium manganate cathode material coated with zirconium dioxide, comprises the following steps:

[0057] Select the LiMn1.95Al0.05O3.8F0.2@xZrO2 material with ZrO2 coating amount of 5%, then mix the positive electrode material, acetylene black and PVDF according to the mass ratio of 8:1:1, and add an appropriate amount of solvent N-methylpyrrolidone solution Slurry. It was uniformly coated on a 20 μm thick aluminum foil, and then vacuum-dried at 120° C. for 6 h. Punch out composite electrode discs with a diameter of 12.0 mm with a tablet press. The obtained disc was used as the positive electrode, the metal lithium sheet was used as the negative electrode, Celgard-2400 was used as the diaphragm, and the 1mol / LLiPF6 (EC+DMC) (volume ratio was 1:1) mixture was used as the electrolyte, and the argon-filled glove box was used to Assemble the CR2025 button battery, and then use the LANDCT2001A battery test system to conduct charge and discharge te...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of electrochemistry, in particular to preparation and application of a zirconium dioxide coated lithium manganate positive electrode material, which comprises the following steps: S1, weighing materials: weighing manganese dioxide (MnO2), lithium fluoride (LiF), aluminum hydroxide (Al (OH) 3), zirconium dioxide (ZrO), lithium carbonate (Li2CO3), a dispersing agent and a binder according to a stoichiometric ratio; the solid materials are sequentially poured into a ball mill, then the ball mill is started to grind the materials, the dispersing agent and the adhesive are poured into the ball mill to be mixed and ground during grinding, and therefore uniform slurry is prepared. The zirconium dioxide coating method designed by the invention has the beneficial effects that when the lithium manganate positive electrode material is produced by using the method, the high-temperature cycle performance of a lithium manganate battery can be improved by the generated LMO-Al-F-3% material, so that the electrochemical performance of the lithium manganate battery is improved.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to the preparation and application of a zirconium dioxide-coated lithium manganate cathode material. Background technique [0002] Lithium ions have attracted the attention of scientists because of their advantages such as high energy density, long cycle life, low self-discharge ability and no memory effect. In recent years, it has been widely used in portable electronic devices and shifted to the fields of electric vehicles and large-scale energy storage, and the safety and manufacturing cost of batteries are the focus of attention in these fields. Lithium manganese oxide has become one of the most widely used cathode materials due to its abundant reserves, low material cost and high safety. [0003] Chinese Patent No. CN105742610B provides a method for preparing a carbon-coated lithium iron manganese phosphate film-type positive electrode material. First, the iron-mangan...

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): H01M4/36H01M4/48H01M4/505H01M10/0525
Inventor 陈静波王剑锋陈鹏鹛马岩华贺兆书
Owner 安徽博石高科新材料股ふん有限公司