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

Composite coated all-solid-state battery cathode material and preparation method thereof and all-solid-state battery

A technology of all-solid-state batteries and positive electrode materials, applied in battery electrodes, electrolyte storage battery manufacturing, secondary batteries, etc., can solve the problems of low ion conductivity, achieve the effect of improving rate performance and cycle performance, and speeding up the process of large-scale application

Inactive Publication Date: 2021-01-01
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF4 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low ionic conductivity of solid-state batteries is the main factor limiting their large-scale application. The reason for the low ionic conductivity is that the ionic conductivity of solid-state electrolytes is lower than that of liquid electrolytes; Another important factor for solid-state battery applications

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
  • Composite coated all-solid-state battery cathode material and preparation method thereof and all-solid-state battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment provides a positive electrode material coated with LATP&CNT composite, the preparation of which includes the following steps:

[0024] Fluidized bed preparation of coated positive electrode:

[0025] (1) Take by weighing 10kg NCM712 cathode material and add in the fluidized bed cavity;

[0026] (2) Mix 25.3g of lithium nitrate, 39.3g of aluminum nitrate nonahydrate, 142.5g of tetrabutyl titanate, 143.1g of triethyl phosphate, and 1L of ethanol, and then add 10kg of CNT slurry with a solid content of 0.4%. , through the form of a peristaltic pump, add gas atomization, add gas into the cavity at a speed of 4g / min, the cavity speed is 300, the gas supply temperature is 120°C, and the exhaust temperature is 40°C;

[0027] (3) The powder material was sintered at 500° C. for 4 hours to obtain a composite-coated cathode material of LATP & CNT.

[0028] Prepare a solid-state battery with the above-mentioned coated and modified composite positive electrode mate...

Embodiment 2

[0032] This embodiment provides an all-solid-state battery using LLTO&CNT-coated positive electrode materials and its manufacturing method. The preparation includes the following steps:

[0033] Fluidized bed preparation of coated positive electrode:

[0034] (1) Take by weighing 10kg NCM712 cathode material and add in the fluidized bed cavity;

[0035] (2) Mix and stir 64.4g of lanthanum nitrate, 10.3g of lithium nitrate, 101.3g of tetrabutyl titanate, and 10L of ethylene glycol monomethyl ether, and then add 10kg of CNT slurry with a solid content of 0.4%. Form, add gas to atomize, add to the cavity at a speed of 4g / min, the cavity speed is 300, the gas supply temperature is 120°C, and the exhaust temperature is 40°C;

[0036] (3) Heat-preserve and sinter the powder material at 550 degrees for 6 hours to obtain a composite coated positive electrode material.

[0037] Prepare a solid-state battery with the above-mentioned coated and modified positive electrode material, the...

Embodiment 3

[0041]This embodiment provides an all-solid-state battery using a positive electrode material coated with LATP&CNT and its manufacturing method. The preparation includes the following steps:

[0042] Fluidized bed preparation of coated positive electrode:

[0043] (1) Weigh 10kg NCM712 positive electrode material, LATP powder 50g, CNT powder 50g and mix fully;

[0044] (2) The mixed powder material is sintered at 500°C for 6 hours to obtain a composite coated positive electrode material.

[0045] Prepare a solid-state battery with the above-mentioned coated and modified positive electrode material, the specific method is:

[0046] (1) The LATP ceramic powder is sand-milled to obtain 300nm particles, and the LATP particles are dissolved in isopropanol dispersion, and then coated on both sides of the 12-micron PP diaphragm through the ceramic coating process, and the coating thickness is prepared as follows: 2 micron LATP functional ionic membrane.

[0047] (2) Using the abov...

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 composite coated all-solid-state battery cathode material and a preparation method thereof, and an all-solid-state battery, and relates to the technical field of lithium ionbatteries, the composite coated all-solid-state battery cathode material comprises a cathode material and a composite coating layer coating the surface of the cathode material; and the composite coating layer is formed by composite coating of lithium-containing metal oxide and a conductive material. Precursor powder can be prepared by adopting a dry-mixing process or a wet-mixing process and thenis calcined. The composite cathode material is prepared by coating the cathode material with the lithium-containing metal oxide and the conductive material, the material has dual characteristics of lithium ion conduction and electron conduction, a bulk phase ion and electron path in an electrode is constructed, the material is used for an all-solid-state battery, the rate capability and the cycleperformance of the battery can be improved, and the large-scale application process of the all-solid-state battery is accelerated.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a composite-coated all-solid-state battery cathode material, a preparation method thereof, and an all-solid-state battery. Background technique [0002] In recent years, with the increase of nickel content in positive electrode materials, on the one hand, it corresponds to the increase of battery energy density, but on the other hand, safety accidents have also increased significantly. The reason is that with the increase of nickel content, on the one hand, the thermal stability of the positive electrode material itself shows an obvious downward trend, which is manifested as a continuous decrease in thermal decomposition temperature; on the other hand, Pan Feng’s research group proposed that the thermal stability of ternary materials The poor stability is mainly related to the oxygen reaction that occurs at the interface, that is, during the charging process, lithiu...

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): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525H01M10/058
CPCH01M4/366H01M4/505H01M4/525H01M4/62H01M4/625H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 牛亚如朱冠楠曹勇
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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