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

High-temperature lithium battery cathode material, preparation method thereof and high-temperature lithium battery

A high-temperature lithium battery and cathode material technology, applied in the field of materials, can solve problems such as insufficient discharge capacity, and achieve the effect of excellent discharge capacity performance

Active Publication Date: 2021-03-16
太仓市华盈电子材料有限公司
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent CN108493440B discloses a high-temperature lithium battery positive electrode material prepared from lithium molybdate as a raw material, the high-temperature lithium battery made by using the high-temperature lithium battery positive electrode material as the positive electrode is discharged at about 200°C Slightly insufficient capacity

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
  • High-temperature lithium battery cathode material, preparation method thereof and high-temperature lithium battery
  • High-temperature lithium battery cathode material, preparation method thereof and high-temperature lithium battery
  • High-temperature lithium battery cathode material, preparation method thereof and high-temperature lithium battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0048] The invention provides a method for preparing a high-temperature lithium battery positive electrode material, which includes the following steps;

[0049] Step S1: preparing lithium molybdate.

[0050] For the preparation of lithium molybdate in step S1, the present invention provides the following two preparation methods.

[0051] Among them, method one includes the following steps:

[0052]Step S11: Weighing the lithium source and the molybdenum source according to the molar ratio of Li:Mo=(2~2.2):1, grinding and mixing to obtain the mixture B;

[0053] Step S12: placing the mixture B obtained in step S11 in an air atmosphere, sintering at a temperature of 450-700° C. for 3-10 hours, and obtaining lithium molybdate after cooling;

[0054] Step S13: placing the lithium molybdate obtained in step S12 under a reducing atmosphere, reducing at a temperature of 700-900° C. for 10-20 hours at a high temperature, and obtaining the lithium molybdate after cooling.

[0055] ...

Embodiment 1

[0073] According to the mol ratio of Li:Mo=2:1, take by weighing 14.8g lithium carbonate and 28.8g molybdenum trioxide with analytical balance, the lithium carbonate and molybdenum trioxide that take are poured in the agate mortar, after fully grinding, pass 150 mesh sieves to obtain mixture B.

[0074] Put the mixture B into a corundum crucible and place it in a muffle furnace for sintering. The sintering atmosphere is air, and the temperature is raised at a heating rate of 5°C / min, and then sintered at 550°C for 5 hours. The sintered product is cooled to room temperature with the furnace. Then take it out to get lithium molybdate.

[0075] Grind the obtained lithium molybdate and pass through a 150-mesh sieve, put it into a crucible and place it in a tube furnace for high-temperature reduction; pass hydrogen-argon mixed gas into the tube furnace (the content of hydrogen is 5%) A reducing atmosphere is formed, and the rate of hydrogen-argon gas mixture is 150mL / min; the tube...

Embodiment 2

[0079] According to the mol ratio of Li:Mo=2:1, take by weighing 3.0g lithium carbonate and 5.1g molybdenum dioxide with analytical balance, pour the lithium carbonate and molybdenum dioxide that take into agate mortar, after fully grinding, pass 150 mesh sieves to obtain mixture B.

[0080] Put the mixture B into a corundum crucible and place it in a tube furnace. Argon gas is introduced into the tube furnace to form an inert gas atmosphere. The rate of argon gas introduction is 100mL / min; The heating rate is raised to 600°C, and the temperature is kept for sintering for 4 hours; then, the tube furnace continues to heat up to 800°C at a rate of 5°C / min, and the temperature is kept for sintering for 10 hours; the sintered product is cooled to room temperature with the furnace and taken out to obtain molybdenum Lithium Oxide.

[0081] The obtained lithium molybdate is ground and crossed a 200 mesh sieve; the lithium molybdate, 2.0g lithium nitrate and potassium nitrate formed ...

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
Melting pointaaaaaaaaaa
Discharge capacityaaaaaaaaaa
Discharge capacityaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a high-temperature lithium battery positive electrode material. The preparation method comprises the following steps: preparing lithium molybdate; grinding and sieving the lithium molybdate; weighing 70-90 parts by mass of ground and sieved lithium molybdate, 5-20 parts by mass of eutectic salt with the melting point lower than 300 DEG C and 5-10 parts by mass of activated carbon, grounding and evenly mixing, and obtaining a mixture A; and sintering the mixture A in a vacuum atmosphere to obtain a high-temperature lithium battery positive electrode material. The invention also provides a high-temperature lithium battery positive electrode material and a high-temperature lithium battery. The high-temperature lithium battery positive electrode material and the preparation method thereof provided by the invention can be applied to the field of high-temperature batteries, and the high-temperature lithium battery prepared from the high-temperature lithium battery positive electrode material has excellent discharge capacity performance.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a high-temperature lithium battery with an operating temperature range of 150-300° C., a positive electrode material of the high-temperature lithium battery and a preparation method. Background technique [0002] Thermal battery, also known as heat-activated battery, is a kind of storage battery that mainly uses eutectic salt as electrolyte, and works after the temperature reaches the melting point of eutectic salt through the heating source inside the battery. The working temperature of thermal batteries is generally 350~550 °C, which has the basic characteristics of heating activation and long-term storage. At room temperature, thermal batteries can be stored for up to 25 years with almost no loss of electrochemical energy. [0003] Thermal batteries have the advantages of high specific energy, large specific power, fast discharge rate, and wide operating temperat...

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): H01M4/36H01M4/58H01M6/36
CPCH01M4/362H01M4/5825H01M6/36
Inventor 任晓英
Owner 太仓市华盈电子材料有限公司
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