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Lithium titanate-indium bismuth liquid metal material for negative electrode of lithium battery and preparation method thereof

A negative electrode lithium titanate, liquid metal technology, applied in battery electrodes, secondary batteries, nanotechnology for materials and surface science, etc., can solve the problem of reducing the specific capacitance of lithium titanate, high reaction temperature, and potential safety hazards, etc. problem, to achieve the effect of stable operation, simple method and preventing flatulence problem

Active Publication Date: 2019-07-23
东营睿港管道工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is that: acid pickling is used after titanium dioxide is mixed with iron source and aluminum source. Can not be accurately doped on lithium and titanium respectively
However, its reaction temperature is high, energy consumption is high, and the process is complicated, which reduces the specific capacitance of lithium titanate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment provides a method for preparing a lithium titanate-indium bismuth liquid metal material for the negative electrode of a lithium battery, which includes the following steps:

[0025] Step 1: Mix glycerol and ethanol at a volume ratio of 0.05:1, stir and mix completely, add bismuth nitrate solid and dissolve it completely, slowly add tetrabutyl titanate into the mixed solution, and stir vigorously 30min, then ultrasonically treat the mixture for 15min and then transfer it to the reaction kettle; the molar ratio of bismuth nitrate and tetrabutyl titanate is 0.2:1; the reaction kettle is placed in a constant temperature oven at 120°C for 24h; after cooling, the The mixture in the kettle was filtered and dried, and placed in a temperature-programmed furnace for calcination at 600°C for 3 hours. After cooling, the calcined product was ground into a powder with uniform particles to obtain nano-lithium titanate;

[0026] Step 2: Mix metal indium and metal bismut...

Embodiment 2

[0033] This embodiment provides a method for preparing a lithium titanate-indium bismuth liquid metal material for the negative electrode of a lithium battery, which includes the following steps:

[0034] Step 1: Mix glycerol and ethanol at a volume ratio of 0.1:1, stir and mix completely, add bismuth nitrate solid and dissolve it completely, slowly add tetrabutyl titanate into the mixture, and stir vigorously 30min, then ultrasonically treat the mixture for 15min and then transfer it to the reaction kettle; the molar ratio of bismuth nitrate and tetrabutyl titanate is 0.2:1; the reaction kettle is placed in a constant temperature oven at 120°C for 24h; after cooling, the The mixture in the kettle was filtered and dried, and placed in a temperature-programmed furnace for calcination at 600°C for 3 hours. After cooling, the calcined product was ground into a powder with uniform particles to obtain nano-lithium titanate;

[0035] Step 2: Mix metal indium and metal bismuth at a m...

Embodiment 3

[0042] This embodiment provides a method for preparing a lithium titanate-indium bismuth liquid metal material for the negative electrode of a lithium battery, which includes the following steps:

[0043] Step 1: Mix glycerin and ethanol at a volume ratio of 0.2:1, stir and mix thoroughly, add bismuth nitrate solid and dissolve it completely, slowly add tetrabutyl titanate into the mixture, and stir vigorously 30min, then ultrasonically treat the mixture for 15min and then transfer it to the reaction kettle; the molar ratio of bismuth nitrate and tetrabutyl titanate is 0.2:1; the reaction kettle is placed in a constant temperature oven at 120°C for 24h; after cooling, the The mixture in the kettle was filtered and dried, and placed in a temperature-programmed furnace for calcination at 500°C for 3 hours. After cooling, the calcined product was ground into a powder with uniform particles to obtain nano-lithium titanate;

[0044] Step 2: Mix metal indium and metal bismuth at a m...

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Abstract

The invention provides a lithium titanate-indium bismuth liquid-state metallic material for a negative electrode of a lithium battery and a preparation method. The lithium titanate-indium bismuth binary liquid-state metallic material is big particles with grain sizes of 50-500[mu]m; in the big particles, lithium titanate nanoparticles are coated with indium bismuth alloy; the mass ratio of the indium element to the bismuth element is (0.55-0.8) to 1; and the mass ratio of indium bismuth alloy to lithium titanate is (5-20) to (95-80). The preparation method comprises the following steps of grinding lithium titanate into nanoscale; mixing metal indium and metal bismuth at the mass ratio of (0.55-0.8) to 1, and heating to 120-180 DEG C to form a liquid-state alloy; and performing mixing on the liquid-state alloy and nanometer lithium titanate at the mass ratio of (5-20) to (95-80), and next, putting the mixture into an air flow type spraying dryer to be subjected to air flow dispersion to form the lithium titanate-indium bismuth binary liquid-state metallic material, wherein the cavity temperature of the air flow type spraying dryer is 90-120 DEG C.

Description

technical field [0001] The invention belongs to the technical field of negative electrode materials of lithium ion batteries, and relates to a lithium titanate-indium bismuth binary liquid metal material applied to the negative electrode of lithium ion batteries and a preparation method thereof. Background technique [0002] Energy is an important material basis for human survival and development, the driving force behind various economic activities, and an important indicator of the level of social and economic development. With the gradual depletion of fossil fuels and the global warming it brings, many researchers have begun to pay attention to the new energy industry. Among them, lithium-ion batteries have become the research field of new energy due to a series of remarkable advantages such as high working voltage, large specific energy, light weight, small size, long cycle life, no memory effect, fast charging and discharging, and no environmental pollution. hotspot. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/485H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/38H01M4/485H01M10/0525Y02E60/10
Inventor 陈庆曾军堂陈兵
Owner 东营睿港管道工程有限责任公司