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Preparation method and application of negative electrode material of tin phosphide sodium ion battery

A sodium-ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of specific capacity, rate performance and cycle performance to be improved, large pollution, poor safety, etc., to improve volume expansion effect Effects of agglomeration effect, high specific capacity, enhanced conductivity and stability

Inactive Publication Date: 2017-02-22
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing literature mostly uses highly toxic and flammable white phosphorus or organic phosphorus as the phosphorus source, which has the disadvantages of large pollution and poor safety, and the specific capacity, rate performance and cycle performance need to be improved

Method used

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  • Preparation method and application of negative electrode material of tin phosphide sodium ion battery
  • Preparation method and application of negative electrode material of tin phosphide sodium ion battery
  • Preparation method and application of negative electrode material of tin phosphide sodium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0034] In this example, a Sn 4 P 3 A preparation method for a negative electrode material for a sodium ion battery, comprising the following steps:

[0035] S1: Take 0.372g of non-toxic commercial red phosphorus, and put it into a stainless steel ball milling tank for ball milling. The ball milling beads are zirconia balls of different sizes, and the mass ratio of the balls to red phosphorus is 100:1. Argon is filled as a protective gas, the rotating speed of the ball mill is 300rpm, and the time is 3h to obtain red phosphorus with a fine particle size (<5 μm);

[0036] S2: Take 1.805g of stannous chloride dihydrate powder, add it to 80mL of ethylenediamine solvent, and stir evenly with a magnetic stirrer to obtain SnCl 2 Dispersion liquid, the concentration is 0.1mol / L;

[0037] S3: Take 0.372g of fine red phosphorus obtained in S1 and add SnCl obtained in S2 2 In the dispersion liquid, first use an ultrasonic cleaning machine for ultrasonic stirring, the power is 100W, a...

Embodiment 2

[0042] In this example, a Sn 4 P 3 A preparation method for a negative electrode material for a sodium ion battery, comprising the following steps:

[0043] S1: Take 0.558g of non-toxic commercial red phosphorus, and put it into a stainless steel ball milling tank for ball milling. The ball milling beads are zirconia balls of different sizes, and the mass ratio of the balls to red phosphorus is 100:1. Argon is filled as a protective gas, the ball milling speed is 300rpm, and the time is 0.5h to obtain red phosphorus with a fine particle size (<5 μm);

[0044] S2: Take 1.805g of stannous chloride dihydrate powder, add it to 80mL of ethylenediamine solvent, and stir evenly with a magnetic stirrer to obtain SnCl 2 Dispersion liquid, the concentration is 0.1mol / L;

[0045] S3: Take 0.558g of fine red phosphorus obtained in S1 and add SnCl obtained in S2 2 In the dispersion, first use an ultrasonic cleaning machine for ultrasonic stirring, the power is 100W, and the duration is...

Embodiment 3

[0050] In this example, a Sn 4 P 3 A preparation method for a negative electrode material for a sodium ion battery, comprising the following steps:

[0051] S1: Take 0.372g of non-toxic commercial red phosphorus, and put it into a stainless steel ball milling tank for ball milling. The ball milling beads are zirconia balls of different sizes, and the mass ratio of the balls to red phosphorus is 50:1. Argon is filled as a protective gas, the rotating speed of the ball mill is 100 rpm, and the time is 3 hours to obtain red phosphorus with a fine particle size (<5 μm);

[0052] S2: Take 1.805g of stannous chloride dihydrate powder, add it to 200mL ethylenediamine solvent, and stir evenly with a magnetic stirrer to obtain SnCl 2 Dispersion liquid, the concentration is 0.04mol / L;

[0053] S3: Take 0.372g of fine red phosphorus obtained in S1 and add SnCl obtained in S2 2 In the dispersion liquid, first use an ultrasonic cleaning machine for ultrasonic stirring, the power is 100...

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Abstract

The invention relates to a preparation method and application of a negative electrode material of a tin phosphide sodium ion battery. The preparation method of the negative electrode material of the tin phosphide sodium ion battery comprises the following steps of performing ball milling pretreatment on poisonless commercial red phosphorus; preparing dispersing liquid of Sn salt; uniformly mixing the red phosphorus subjected to ball milling pretreatment and the dispersing liquid of the Sn salt; putting into a reaction kettle, and fully reacting, so as to obtain a turbid suspension; naturally cooling the turbid suspension, filtering to obtain a precipitate, washing, and drying, so as to obtain the negative electrode material of the tin phosphide sodium ion battery. The prepared negative electrode material of the tin phosphide sodium ion battery has the advantages that the problems of large irreversible capacity loss and poor conduction and circulation properties are solved when the pure phosphorus material is used for actually preparing a negative electrode of the sodium ion battery; high-poison white phosphorus or organic phosphorus is not used as a phosphorus source, so that the green and simple effects are realized, and the safety is high.

Description

technical field [0001] The invention relates to the field of battery material preparation, in particular to a preparation method and application of a tin phosphide sodium ion battery negative electrode material. Background technique [0002] Green new energy and energy-saving technology is the fundamental guarantee for solving energy and environmental problems. With the development of solar energy, wind energy, long-range electric vehicles and smart grids, higher and higher requirements are placed on new energy storage systems. In order to meet the growing demand for energy saving and environmental protection, the research and development of power sources and energy storage materials with high specific capacity, high safety, long life, and low cost has become an important frontier research direction in the world. Because Na element is abundant in nature, accounting for about 2.64% of the earth's crustal reserves, it is widely distributed and the development cost is low. Com...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/136H01M4/1397H01M10/054
CPCH01M4/136H01M4/1397H01M4/5805H01M10/054Y02E60/10
Inventor 汝强郭庆汪贝胡社军
Owner SOUTH CHINA NORMAL UNIVERSITY
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