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Inorganic composite nanoparticle, as well as preparation method thereof, and application of inorganic composite nanoparticle to all-solid-state lithium ion battery

An inorganic composite and nanoparticle technology, applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems of uneven dispersion, limiting the performance of composite polymer electrolytes, and agglomeration, so as to solve the problem of battery short circuit, improve room temperature conductivity and Effect of improving mechanical strength and mechanical stability

Active Publication Date: 2017-05-24
中科(马鞍山)新材料科创园有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, inorganic fillers, especially inorganic nanofillers, are prone to agglomeration and uneven dispersion in the polymer matrix, which limits the further improvement of the performance of composite polymer electrolytes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Preparation of carbon nanotubes / attapulgite rods:

[0083] (A)': Disperse the attapulgite bar in an aqueous solution of sodium hexametaphosphate with a mass percentage of 1%-5%, magnetically stir at a speed greater than 500r / min for 1h-2h, then ultrasonically disperse for 1h-2h, statically Set aside for 2 hours, centrifuge and dehydrate the obtained upper milky white suspension and dry it at 100°C to obtain purified attapulgite sticks;

[0084] (A): Place two quartz boats with a distance of 5 cm in the tube furnace. Ferric chloride powder is evenly dispersed on the bottom of one quartz boat, and a silicon substrate is placed on the bottom of the other quartz boat. Spread on the surface of the silicon substrate;

[0085] (B): Introduce argon gas into the tube furnace to remove the air, raise the temperature to 350°C at a rate of 20°C / min, and keep it warm for 30min;

[0086] (C): Continue to heat up to 700°C at a rate of 25°C / min, feed a mixed gas of hydrogen and argon...

Embodiment 2

[0098] Preparation of carbon nanotubes / attapulgite rods is the same as in Example 1.

[0099] Preparation of inorganic composite nanoparticles:

[0100] (1) The dispersion of attapulgite rods (carbon nanotubes / attapulgite rods) loaded with 0.5wt% carbon nanotubes in situ and the dispersion liquid of graphene oxide were added to an appropriate amount of organic solvent dichloride according to a certain ratio. methane to obtain a mixed solution. Wherein, the particle size of the attapulgite rods is 30nm, and the mass content of graphene oxide is 5% of the total amount of the attapulgite rods loaded with carbon nanotubes in situ and the graphene.

[0101] (2) Ultrasonicize the above mixed solution for 1 hour, stir at 30°C for 1 hour, then continue to heat up to 55°C, stir and reflux for 5 hours, centrifuge the suspension, wash and filter it repeatedly with absolute ethanol, and filter The cake was fully dried under vacuum conditions at 40°C to obtain a mixture of surface-modifi...

Embodiment 3

[0108] Preparation of carbon nanotubes / attapulgite rods is the same as in Example 1.

[0109] Preparation of inorganic composite nanoparticles:

[0110] (1) The dispersion liquid of the attapulgite bar (carbon nanotube / attapulgite bar) loaded with 10wt% carbon nanotubes in situ and the dispersion liquid of graphene oxide were added to an appropriate amount of organic solvent 2-hydroxy -1,3-dioxolane-4-carboxylic acid to obtain a mixed solution. Wherein, the particle size of the attapulgite rod is 150nm, and the mass content of graphene oxide is 0.1% of the total amount of the attapulgite rod and graphene loaded with carbon nanotubes in situ.

[0111] (2) Ultrasonicize the above mixture for 5 hours, stir at 55°C for 2 hours, then continue to heat up to 90°C, stir and reflux for 40 hours, centrifuge the suspension, wash and filter it repeatedly with absolute ethanol, and filter The cake was fully dried under vacuum conditions at 80° C. to obtain a mixture of surface-modified c...

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Abstract

The invention provides an inorganic composite nanoparticle, as well as a preparation method thereof, and an application of the inorganic composite nanoparticle to an all-solid-state polymer battery. The inorganic composite nanoparticle disclosed by the invention comprises a surface modified carbon nanotube / attapulgite rod and a surface modified oxidized graphene mixture, wherein the carbon nanotube / attapulgite rod is an attapulgite rod which is loaded with a carbon nanotube at an original position. An all-solid-state polymer electrolyte adopting the inorganic composite nanoparticle, a polymer matrix and alkali metal salt not only has high mechanical strength, high flexibility, high mechanical stability, high chemical stability and high heat stability, but also has higher ionic conductivity (between 1.206*10<-5>-4.261*10<-4> S / cm), can realize favorable contact with electrodes, and is small in interface resistance. The preparation method of the inorganic composite nanoparticle and a preparation method of the all-solid-state polymer electrolyte disclosed by the invention are simple, and industrialized popularization and application are easy to realize.

Description

technical field [0001] The invention belongs to the technical field of polymer electrolytes, and relates to an inorganic composite nanoparticle, its preparation method and its application in an all-solid-state lithium ion battery, in particular to an inorganic composite nanoparticle, its preparation method and a battery containing the inorganic composite nanoparticle All solid polymer electrolyte and all solid lithium ion battery. Background technique [0002] Lithium-ion batteries have many advantages such as high energy density, long service life, large output power, small self-discharge, no memory effect, fast charging and discharging, and environmental friendliness. Small and medium-sized batteries such as electric bicycles are widely used in the field, and have become an indispensable part of the energy economy in the 21st century. However, the use of volatile, flammable and explosive organic electrolytes in lithium-ion batteries is likely to cause safety problems, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/056H01M10/0565Y02E60/10
Inventor 谭强强徐宇兴
Owner 中科(马鞍山)新材料科创园有限公司