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

Preparation method of nanocarbon coated lithium titanate cathode material

A technology of carbon-coated lithium titanate and negative electrode materials, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high production cost, agglomeration phenomenon, high price, etc., and achieve saving The effect of production cost, reduction of manufacturing cost, and improvement of material properties

Active Publication Date: 2014-03-26
SHANDONG GOLDENCELL ELECTRONICS TECH
View PDF12 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The most commonly used preparation methods for lithium titanate anode materials are solid-phase method and organic titanium source decomposition synthesis method. However, the lithium titanate material produced by the solid-phase method has a large particle size, obvious agglomeration phenomenon, fast capacity decay, and poor cycle performance. Good; the use of organic titanium sources as raw materials to prepare lithium titanate materials can refine the material size, but it is expensive and the production cost is high, which is not suitable for mass industrial production. At the same time, the intrinsic conductivity of lithium titanate is low, which is not conducive to positive electrodes. High rate discharge of materials

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 nanocarbon coated lithium titanate cathode material
  • Preparation method of nanocarbon coated lithium titanate cathode material
  • Preparation method of nanocarbon coated lithium titanate cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing a nanosized and carbon-coated composite lithium titanate negative electrode material, comprising the following steps:

[0022] (1) Prepare 8mol / L strong alkali solution, weigh 80ml and add it to 100ml of autoclave polytetrafluoroethylene lining, then weigh 2g of titanium dioxide and add it, and then place it in an oven to react at 160°C for 5 hours. After the reaction was completed, the precipitate in the polyethylene lining of the autoclave was washed several times with hydrochloric acid, then washed with distilled water and filtered, and finally placed in a drying device for 5 hours at 100 °C; (2) according to the Li:Ti molar ratio of 0.84 : 1 Weigh the lithium carbonate and the pretreated titanium dioxide powder material, and place them in a ball mill; then weigh and weigh 0.2 times the molar mass of the soluble carbon source (relative to Ti salt), add it to the beaker and dissolve it with a small amount of distilled water. All were transferred...

Embodiment 2

[0025] (1) Prepare a 6 mol / L strong alkali solution, weigh 80 ml and add it to a 100 ml autoclave polytetrafluoroethylene lining, then weigh 2 g of titanium dioxide and add it, and then place it in an oven to react at 180°C for 3 hours. After the reaction, the precipitate in the polyethylene lining of the autoclave was washed several times with hydrochloric acid, then washed with distilled water and filtered, and finally placed in a drying device for 5 hours at 100 °C; (2) according to the Li:Ti molar ratio of 0.84 : 1 Weigh the lithium carbonate and the pretreated titanium dioxide powder material, and place them in a ball mill; then weigh and weigh 0.2 times the molar mass of the soluble carbon source (relative to Ti salt), add it to the beaker and dissolve it with a small amount of distilled water. All were transferred into a ball mill jar, and put into agate balls for ball milling for 1 hour; (3) The obtained materials were quickly dried by spray drying equipment, and then a...

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

A preparation method of a nanocarbon coated lithium titanate cathode material comprises the following steps of: (1) preparing a strongly alkaline solution, weighing titanium dioxide, adding into an autoclave for reaction for 3-5h at 160-180 DEG C, cleaning a precipitate in a polyethene lining of the autoclave with hydrochloric acid for several times, performing filtration washing with distilled water, then putting in vacuum drying equipment for drying, (2) weighing a lithium source and pretreated titanium dioxide powder material according to an Li:Ti mole ratio, putting in a ball milling tank, then weighing a soluble carbon source, adding a little distilled water, dissolving at room temperature or under a heating condition, transferring all into a mixing tank, (3) quickly drying slurry with a spray dryer, transferring all materials into a corundum crucible or a saggar, putting in a muffle furnace for sintering in shielding gas, and (4) grinding and sieving an obtained material, and obtaining the carbon coated lithium titanate cathode material.

Description

technical field [0001] The invention relates to a preparation method of lithium titanate negative electrode material of lithium ion secondary battery, in particular to a preparation method of nanometer carbon-coated lithium titanate negative electrode material. Background technique [0002] Lithium-ion battery, also known as "lithium-ion battery", is an important new energy technology in the 21st century to cope with the increasing depletion of energy and the deteriorating environment. Its development first began during the world oil crisis in the 1960s and 1970s. After nearly 20 years of exploration, in 1990, Japan's Sony Energy Company and Italy's Moli Energy Company took the lead in developing a carbon material as the negative electrode and LiCoO as the negative electrode. 2 Lithium-ion battery with positive electrode. Since then, lithium-ion batteries have developed rapidly. At the same time, lithium-ion batteries have high energy density, high average output voltage,...

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): H01M4/36H01M4/485B82Y30/00
CPCY02E60/122B82Y30/00B82Y40/00H01M4/366H01M4/485H01M4/625H01M10/0525Y02E60/10
Inventor 关成善宗继月孟博杜显振
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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