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A kind of preparation method of barium sodium titanate composite negative electrode material for lithium ion battery

A technology for lithium ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of reducing the energy density of the whole battery, low lithium ion diffusion rate, low theoretical capacity, etc., and achieve excellent rate performance, dispersion The effect of good performance, stability and high conductivity

Active Publication Date: 2020-05-05
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the relatively low lithium ion diffusion rate, low electrical conductivity, and low theoretical capacity all restrict Li 4 Ti 5 o 12 Wider range of applications; in addition, a relatively high voltage platform (1.55V vs. Li + / Li), significantly reduced the Li 4 Ti 5 o 12 As the full battery voltage of the negative electrode, which in turn reduces the energy density of the full battery

Method used

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  • A kind of preparation method of barium sodium titanate composite negative electrode material for lithium ion battery
  • A kind of preparation method of barium sodium titanate composite negative electrode material for lithium ion battery

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Embodiment 1

[0020] Dissolve 0.02mol sodium nitrate and 0.01mol barium nitrate in 300mL ethanol aqueous solution, add citric acid, the ratio of citric acid to metal cation is 3.5:1, stir for 3h, and record it as solution A; 4 Dissolved in alcohol solution, stirred for 2h, recorded as solution B. The solutions A and B were quickly mixed and vigorously stirred, and the temperature was raised to 80°C. After the liquid was evaporated to dryness, it was placed in a vacuum drying oven for 12 hours at 100°C for vacuum drying. Then put the precursor in a muffle furnace for pre-calcination at 450°C for 6 hours, cool to room temperature, mill in a ball mill for 4 hours, sieve, put it into a muffle furnace and burn at 1000°C for 12 hours, cool to room temperature, and ball mill 24h, the lithium-ion battery negative electrode material BaNa 2 Ti 6 o 14 Material. Take 1g of the resulting BaNa 2 Ti 6 o 14 Put the material into a clean beaker, add 100mg of sodium dodecylsulfonate, add 400mL of deio...

Embodiment 2

[0022] Dissolve 0.02mol sodium nitrate and 0.01mol barium nitrate in 300mL ethanol aqueous solution, add citric acid, the ratio of citric acid to metal cation is 3:1, stir for 2h, record as solution A; 4 Dissolved in alcohol solution, stirred for 1h, recorded as solution B. The solutions A and B were quickly mixed and vigorously stirred, and the temperature was raised to 80°C. After the liquid was evaporated to dryness, it was placed in a vacuum drying oven at 90°C for 12 hours in vacuum. Then put the precursor in a muffle furnace at 400°C for 4 hours, cool to room temperature, ball mill in a ball mill for 3 hours, sieve, put it in a muffle furnace and burn at 900°C for 10 hours, cool to room temperature, and ball mill 24h, the lithium-ion battery negative electrode material BaNa 2 Ti 6 o 14 Material. Take 1g of the resulting BaNa 2 Ti 6 o 14 Put the material into a clean beaker, add 100mg of sodium dodecylsulfonate, then add 400mL of deionized water, sonicate for 10min...

Embodiment 3

[0024] Dissolve 0.02mol sodium nitrate and 0.01mol barium nitrate in 300mL ethanol aqueous solution, add citric acid, the ratio of citric acid to metal cation is 4:1, stir for 3h, record as solution A; 4 Dissolved in alcohol solution, stirred for 2h, recorded as solution B. The solutions A and B were quickly mixed and vigorously stirred, and the temperature was raised to 80°C. After the liquid was evaporated to dryness, it was placed in a vacuum drying oven at 120°C for vacuum drying for 12 hours. Then put the precursor in a muffle furnace at 600°C for 6 hours, cool to room temperature, mill in a ball mill for 4 hours, sieve, put it in a muffle furnace and burn at 1100°C for 15 hours, cool to room temperature, and ball mill 24h, the lithium-ion battery negative electrode material BaNa 2 Ti 6 o 14 Material. Take 1g of the resulting BaNa 2 Ti 6 o 14 Put the material into a clean beaker, add 100mg of sodium dodecylsulfonate, then add 400mL of deionized water, sonicate for ...

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Abstract

The invention discloses a preparation method of a sodium barium titanate composite negative material for a lithium ion battery, which belongs to the technical field of a lithium ion battery. The method comprises the following steps: dissolving sodium nitrate and barium nitrate into an alcohol aqueous solution, adding organic acid, and marking as a solution A; dissolving TiCl4 in the alcohol solution, and marking as a solution B; mixing the solution A and the solution B, stirring, and evaporating the liquid; then pre-burning in a muffle furnace, sintering, cooling to room temperature, ball milling to obtain a BaNa2Ti6O14 material; placing the BaNa2Ti6O14 material into a beaker, adding a surfactant and deionized water, ultrasonically dispersing, and then stirring; and then adding pyrrole andacid solution, adding oxidant, stirring in an icy water bath, washing, and obtaining the BaNa2Ti6O14@PPy composite negative material. The negative material is uniform in particle size, stable and compact in structure, remarkable in wide potential window reversibility, excellent in rate capacity and stable in cycling life.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a titanate negative electrode material of a lithium ion battery, in particular to a preparation method of a barium sodium titanate composite negative electrode material. Background technique [0002] Traditional fossil energy is facing the crisis of shortage or even depletion, and it has brought huge pressure to environmental protection. The new industrialization development direction of circular economy and low-carbon economy will promote the rapid development of new energy automobile industry. As a new generation of environmentally friendly and high-energy batteries, lithium-ion power batteries have become the mainstream product of power batteries for new energy vehicles. Although the protection circuit of lithium-ion batteries is relatively mature, for power batteries, the selection of negative electrode materials is very critical to truly ensure safe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525
CPCH01M4/362H01M4/485H01M4/62H01M10/0525Y02E60/10
Inventor 朱彦荣伊廷锋
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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