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A kind of tin niobate nano plate and its preparation method and its application in the preparation of lithium battery

A technology of nanoplate and hydrothermal reaction, applied in nanotechnology, battery electrodes, secondary batteries, etc., can solve problems such as low theoretical capacity, inability to meet high specific capacity battery anode materials, poor safety performance, etc.

Active Publication Date: 2020-10-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the anode materials of commercial lithium-ion batteries are mainly carbon materials, but their low theoretical capacity (372mAh g -1 ), poor safety performance and other issues, unable to meet the requirements of a new generation of high specific capacity battery anode materials

Method used

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  • A kind of tin niobate nano plate and its preparation method and its application in the preparation of lithium battery
  • A kind of tin niobate nano plate and its preparation method and its application in the preparation of lithium battery
  • A kind of tin niobate nano plate and its preparation method and its application in the preparation of lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] sn 2 Nb 2 o 7 Preparation method of nanoplate:

[0033] 1) Weigh / measure 0.5g of Nb 2 o 5 , 0.84g of KOH and 30mL of 50% mass percent ethanol aqueous solution were placed in a reaction kettle lined with polytetrafluoroethylene, fully stirred and mixed uniformly to make a mixed solution A;

[0034] 2) Put the reaction kettle into an oven, and react the mixed solution A hydrothermally at 230°C for 12 hours;

[0035] 3) naturally cooling the substance B generated by the hydrothermal reaction to room temperature;

[0036] 4) Centrifuge the cooled substance B, wash it several times with deionized water and absolute ethanol, put it into a vacuum drying oven, and dry it at 40°C for 1 hour to obtain K 4 Nb 6 o 17 ;

[0037] 5) Weigh / measure 0.5g of K 4 Nb 6 o 17 , 1g of SnCl 2 2H 2 O, 3g of Na 3 C 6 h 5o 7 2H 2 O and 40mL of aqueous sodium hydroxide solution with a concentration of 0.1mol / L were placed in a reaction kettle lined with polytetrafluoroethylene, ...

Embodiment 2

[0044] sn 2 Nb 2 o 7 Preparation method of nanoplate:

[0045] 1) Weigh / measure 0.4g of Nb 2 o 5 , 0.84g of KOH and 50mL of 30% mass percent ethanol aqueous solution were placed in a reaction kettle lined with polytetrafluoroethylene, fully stirred and mixed evenly, and mixed solution A was made;

[0046] 2) Put the reaction kettle into an oven, and the mixed solution A is hydrothermally reacted at 250°C for 18 hours;

[0047] 3) naturally cooling the substance B generated by the hydrothermal reaction to room temperature;

[0048] 4) Centrifuge the cooled substance B, wash it several times with deionized water and absolute ethanol, put it into a vacuum drying oven, and dry it at 60°C for 1 hour to obtain K 4 Nb 6 o 17 ;

[0049] 5) Weigh / measure 0.5g of K 4 Nb 6 o 17 , 1.5g SnCl 2 2H 2 O, 4g of Na 3 C 6 h 5 o 7 2H 2 O and 20mL of aqueous sodium hydroxide solution with a concentration of 0.2mol / L were placed in a reaction kettle lined with polytetrafluoroethy...

Embodiment 3

[0056] sn 2 Nb 2 o 7 Preparation method of nanoplate:

[0057] 1) Weigh / measure 0.6g of Nb 2 o 5 , 0.84g of KOH and 40mL of 40% mass percent ethanol aqueous solution are placed in a polytetrafluoroethylene-lined reactor, fully stirred and mixed evenly, and mixed solution A is made;

[0058] 2) Put the reaction kettle into an oven, and the mixed solution A is hydrothermally reacted at 200°C for 24 hours;

[0059] 3) naturally cooling the substance B generated by the hydrothermal reaction to room temperature;

[0060] 4) Centrifuge the cooled substance B, wash it several times with deionized water and absolute ethanol, put it into a vacuum drying oven, and dry it at 50°C for 1 hour to obtain K 4 Nb 6 o 17 ;

[0061] 5) Weigh / measure 0.5g of K 4 Nb 6 o 17 , 2.5g SnCl 2 2H 2 O, 4g of Na 3 C 6 h 5 o 7 2H 2 O and 35mL of aqueous sodium hydroxide solution with a concentration of 0.5mol / L were placed in a reaction kettle lined with polytetrafluoroethylene, fully sti...

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Abstract

The invention discloses a Sn2Nb2O7 nano-plate, a preparation method thereof and application of the tin niobate nano-plate in preparation of lithium batteries, and belongs to the technical field of material preparation and lithium ion battery materials. The preparation method comprises the following steps: performing hydrothermal reaction on a certain amount of Nb2O5, KOH and alcohol aqueous solution to obtain K4Nb6O17; performing hydrothermal reaction on K4Nb6O17, SnCl2.2H2O, Na3C6H5O7.2H2O and a sodium hydroxide aqueous solution, cooling, centrifuging, washing and drying to obtain a Sn2Nb2O7nano-plate; mixing and grinding a certain amount of Sn2Nb2O7, sodium carboxymethylcellulose and acetylene black, adding a proper amount of water to prepare uniform slurry, and uniformly coating a copper plate to prepare a work electrode of a lithium ion battery. The preparation method of Sn2Nb2O7 is simple and easy to operate, and has low preparation cost and good repeatability. The Sn2Nb2O7 nano-plate has high purity and good crystallization, and is suitable for large-scale production. The lithium ion battery taking the Sn2Nb2O7 nano-plate as work plate has relatively high specific capacity,excellent rate performance and excellent circulation performance.

Description

technical field [0001] The invention belongs to the technical field of material preparation and lithium ion battery materials, in particular to a tin niobate (Sn 2 Nb 2 o 7 ) nanoplate and its preparation method and its application in the preparation of lithium batteries. Background technique [0002] Lithium-ion batteries have been widely used in various portable electronic devices and hybrid vehicles because of their advantages such as fast charging speed, long cycle life, high energy density, safety and pollution-free. With the advancement of science and technology and the improvement of people's living standards, there are higher requirements for the comprehensive performance of lithium-ion batteries. At present, the anode materials of commercial lithium-ion batteries are mainly carbon materials, but their low theoretical capacity (372mAh g -1 ), poor safety performance, etc., and cannot meet the requirements of a new generation of high specific capacity battery anod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G33/00B82Y30/00H01M4/48H01M10/0525
CPCB82Y30/00C01G33/00C01P2002/72C01P2004/03C01P2004/04C01P2004/62H01M4/48H01M10/0525H01M2004/021Y02E60/10
Inventor 孔新刚张家瑞冯旗黄剑锋殷立雄欧阳海波
Owner SHAANXI UNIV OF SCI & TECH