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Lithium and sodium ion battery flame retardant and preparation and application methods thereof

A sodium-ion battery, flame retardant technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of high price, wide particle size distribution, rapid battery temperature rise, etc., and achieve low production cost, uniform particle size, Good flame retardant effect

Active Publication Date: 2018-05-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But they all have a common disadvantage: the electrolyte of lithium and sodium-ion batteries is basically a flammable organic solvent. When charging and discharging at a high rate, short circuit or high temperature, the interior of the battery will heat up rapidly, resulting in combustion and explosion.
Therefore, safety issues have restricted the application of lithium and sodium ion batteries.
The alumina produced by these methods is generally amorphous hard agglomerated particles with wide particle size distribution, poor performance, high price, complicated process, and even pollutes the environment, which greatly limits its application in various aspects.

Method used

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  • Lithium and sodium ion battery flame retardant and preparation and application methods thereof
  • Lithium and sodium ion battery flame retardant and preparation and application methods thereof
  • Lithium and sodium ion battery flame retardant and preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of Al2O3 Flame Retardant by Alternating Current Electrochemical Method

[0038] Immerse the aluminum / graphite rod as the working electrode in 200mL of 2.5mol / L sodium nitrate electrolyte solution, the immersion area is 4cm 2 . Then set the AC voltage to 8V and the frequency to 50Hz for electrolysis. After the electrolysis is finished, the electrolyzed product is centrifuged, washed, dried and collected. Finally, under the protection of argon, the dried electrolyte was placed in a tube furnace and calcined at 450 °C for 2 h with a heating rate of 2 °C / min.

[0039] (2) Application of the prepared aluminum oxide flame retardant in lithium and sodium ion batteries

[0040] Respectively with 1.0mol / L LiPF 6 / EC+DMC (volume ratio 1:1) and 1.0mol / L NaClO 4 / PC solution is used as the reference electrolyte for lithium and sodium ion batteries. In a nitrogen-filled glove box, add Al per milliliter of Li-ion battery reference electrolyte 2 o 3 The quality...

Embodiment 2

[0046] (1) Preparation of Al2O3 Flame Retardant by Alternating Current Electrochemical Method

[0047] Immerse aluminum / platinum as a working electrode in 500mL of 1.75mol / L ammonium sulfate electrolyte solution, with an immersion area of ​​20cm 2 . Then set the AC voltage to 2.5V and the frequency to 70Hz for electrolysis. After the electrolysis is finished, the electrolyzed product is centrifuged, washed, dried and collected. Finally, under the protection of argon, the dried electrolyte was placed in a tube furnace and calcined at 500 °C for 6 h with a heating rate of 5 °C / min.

[0048] (2) Application of the prepared aluminum oxide flame retardant in lithium and sodium ion batteries

[0049] Respectively with 1.0mol / L LiPF 6 / EC+DMC (volume ratio 1:1) and 1.0mol / L NaClO 4 / PC solution is used as the reference electrolyte for lithium and sodium ion batteries. In a nitrogen-filled glove box, add Al per milliliter of Li-ion battery reference electrolyte 2 o 3 The quali...

Embodiment 3

[0054] (1) Preparation of Al2O3 Flame Retardant by Alternating Current Electrochemical Method

[0055] Immerse aluminum / aluminum as a working electrode in 800mL 0.75mol / L potassium carbonate electrolyte solution, with an immersion area of ​​60cm 2 . Then set the AC voltage to 18V and the frequency to 120Hz for electrolysis. After the electrolysis is finished, the electrolyzed product is centrifuged, washed, dried and collected. Finally, under the protection of argon, the dried electrolyte was placed in a tube furnace and calcined at 800 °C for 12 h with a heating rate of 8 °C / min.

[0056] (2) Application of the prepared aluminum oxide flame retardant in lithium and sodium ion batteries

[0057] Respectively with 1.0mol / L LiPF 6 / EC+DMC (volume ratio 1:1) and 1.0mol / L NaClO 4 / PC solution is used as the reference electrolyte for lithium and sodium ion batteries. In a nitrogen-filled glove box, add Al per milliliter of Li-ion battery reference electrolyte 2 o 3 The qual...

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Abstract

The invention discloses a lithium and sodium ion battery flame retardant and preparation and application methods thereof. The preparation method includes that alternating-current equipment with certain voltage and frequency applied is adopted for electrolysis of metal aluminum operating electrodes in inorganic salt electrolytes solution, an electrolysis product is subjected to centrifuging, washing, drying and calcining in a protecting atmosphere to obtain an aluminum oxide flame retardant uniform in particle size, and the aluminum oxide flame retardant is applied to lithium and sodium ion batteries. The method is simple in operation, high in yield, environmentally friendly, low in production cost and beneficial to industrial production.

Description

technical field [0001] The invention relates to the technical field of preparation of flame retardants for lithium and sodium ion batteries, in particular to an Al 2 o 3 Flame retardant and its preparation method, and its application in lithium and sodium ion batteries. Background technique [0002] As a secondary battery, lithium-ion batteries have the advantages of high specific energy, good cycle performance and low pollution, and are widely used in various electrical appliances. Due to the advantages of rich sodium resources and low price, sodium-ion batteries have attracted the attention of researchers in recent years. But they all have a common disadvantage: the electrolyte of lithium and sodium-ion batteries is basically a flammable organic solvent. When charging and discharging at a high rate, short circuit or high temperature, the interior of the battery will heat up rapidly, resulting in combustion and explosion. . Therefore, safety issues have restricted the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525H01M10/054
CPCH01M10/0525H01M10/054H01M10/0567H01M2300/0025Y02E60/10
Inventor 纪效波帅洪磊侯红帅徐为
Owner CENT SOUTH UNIV
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