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Preparation method of lithium-sodium-doped synergic carbon coated modified lithium barium titanate anode material

A nitrogen-doped carbon and sodium-doped technology, applied in battery electrodes, electrical components, electrochemical generators, etc., can solve the problems of low electronic and ionic conductivity, inability to obtain high-power and long-life lithium-ion battery anode materials, etc. , to achieve the effect of uniform particle size, superior electrochemical performance, and high power

Active Publication Date: 2017-06-13
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

It can be seen from this that BaLi 2 Ti 6 o 14 It is very suitable as an electrode material for lithium-ion batteries, but pure BaLi 2 Ti 6 o 14 It has the disadvantages of low electronic and ionic conductivity, so it is urgent to take effective measures to modify it to improve its electrochemical performance
[0005] Existing BaLi 2 Ti 6 o 14 The modification method of the negative electrode material is mainly to do the barium site with metal ions, including Ag + , Pb 2+ 、Al 3+ , La 3+ At the same time, surface silver coating was also tried. However, a single modification measure failed to effectively obtain high-performance barium lithium titanate, so that a high-power and long-life lithium-ion battery that can meet the current social needs cannot be obtained. Negative material

Method used

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  • Preparation method of lithium-sodium-doped synergic carbon coated modified lithium barium titanate anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Take 0.1 mole of barium nitrate, 0.2 mole of lithium nitrate, 0.01 mole of sodium acetate, 0.6 mole of nano-titanium dioxide (6 nm), and 0.1 mole of carbon black, mix them by ball milling at 400 rpm for 19 hours, and place them in an oven at 150°C After drying, grind it finely in an agate mortar, then sinter the powder in a muffle furnace, first take 2 hours to raise the temperature from room temperature to 650°C, and keep the temperature at this temperature for 5 hours for pre-calcination to decompose the salts, and then It takes 2 hours to raise the temperature to 950°C, and keep it at this temperature for 10 hours, and then naturally cool to room temperature to obtain lithium-site sodium-doped barium lithium titanate. Next, put the obtained lithium-site sodium-doped barium lithium titanate into a porcelain boat and place it in a tube atmosphere furnace, and then put another porcelain boat containing melamine into a tube atmosphere furnace and place it in an...

Embodiment 2

[0012] Example 2: Take 0.1 mole of barium nitrate, 0.2 mole of lithium nitrate, 0.03 mole of sodium acetate, 0.6 mole of nano-titanium dioxide (6 nm), and 0.1 mole of carbon black, mix them by ball milling at 400 rpm for 19 hours, and place them in an oven at 150°C After drying, grind it finely in an agate mortar, then sinter the powder in a muffle furnace, first take 2 hours to raise the temperature from room temperature to 650°C, and keep the temperature at this temperature for 5 hours for pre-calcination to decompose the salts, and then It takes 2 hours to raise the temperature to 950°C, and keep it at this temperature for 10 hours, and then naturally cool to room temperature to obtain lithium-site sodium-doped barium lithium titanate. Next, put the obtained lithium-site sodium-doped barium lithium titanate into a porcelain boat and place it in a tube atmosphere furnace, and then put another porcelain boat containing melamine into a tube atmosphere furnace and place it in an...

Embodiment 3

[0013]Example 3: Take 0.1 mole of barium nitrate, 0.2 mole of lithium nitrate, 0.05 mole of sodium acetate, 0.6 mole of nano-titanium dioxide (6 nm), and 0.1 mole of carbon black, mix them by ball milling at 400 rpm for 19 hours, and place them in an oven at 150 ° C. After drying, grind it finely in an agate mortar, then sinter the powder in a muffle furnace, first take 2 hours to raise the temperature from room temperature to 650°C, and keep the temperature at this temperature for 5 hours for pre-calcination to decompose the salts, and then It takes 2 hours to raise the temperature to 950°C, and keep it at this temperature for 10 hours, and then naturally cool to room temperature to obtain lithium-site sodium-doped barium lithium titanate. Next, put the obtained lithium-site sodium-doped barium lithium titanate into a porcelain boat and place it in a tube atmosphere furnace, and then put another porcelain boat containing melamine into a tube atmosphere furnace and place it in ...

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Abstract

The invention relates to a lithium-sodium-doped synergic carbon coated modified lithium barium titanate anode material which is prepared from the following steps of: ball-milling and mixing barium nitrate, lithium nitrate, sodium acetate, titanium dioxide and carbon black; then sintering the obtained powder in a muffle furnace; firstly, pre-sintering the powder at a constant temperature of 650 DEG G for 5 hours to decompose a salt; then sintering the powder at 950 DEG C for 10 hours; naturally cooling the powder to room temperature to obtain the lithium-sodium-doped lithium barium titanate; then putting the obtained lithium-sodium-doped lithium barium titanate in a porcelain boat and placing the porcelain boat in a tubular atmospheric furnace; then placing another porcelain where melamine in the tubular atmospheric furnace too and placing the porcelain in the upstream of an air flow; by taking argon as protective gas, treating the porcelain for 2 hours at 650 DEG C; naturally cooling the same to room temperature; taking out a product and grinding the product into powder; and obtaining the product which is the lithium-sodium-doped synergic carbon coated modified lithium barium titanate anode material.

Description

technical field [0001] The invention relates to a barium lithium titanate negative electrode material for a lithium ion battery, in particular to a preparation method for lithium-site sodium doping and nitrogen doping carbon coating modified barium lithium titanate negative electrode material. Background technique [0002] In recent years, my country has successively issued support policies for new energy vehicles, reflecting the country's emphasis on the development of new energy vehicles, especially electric vehicles. However, most electric vehicles in my country are equipped with lead-acid batteries. These batteries have low specific energy and short life. They often need to be scrapped and replaced after one year of use. Moreover, heavy metals such as lead and cadmium and sulfuric acid contained in batteries are harmful to the environment. The environment is seriously harmful, and the recycling technology of this type of battery is difficult, and the current recycling wor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/583H01M4/62H01M10/0525
CPCH01M4/366H01M4/485H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 罗明贺舒杰吴瑶瑶杨科张延玉
Owner NINGBO UNIV
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