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Iron-copper-tin ternary selenide nano material for sodium-ion battery and preparation method of iron-copper-tin ternary selenide nano material

A sodium-ion battery and nano-material technology, applied in the field of multi-component selenide nano-materials and its preparation, and electrode materials for high-performance sodium-ion batteries, can solve the problems that graphite cannot meet the needs of sodium-ion batteries, etc., and achieve the benefits of charge transfer, Long cycle life and good chemical stability

Active Publication Date: 2022-06-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the radius of sodium ions is larger than that of lithium ions, graphite, which is traditionally used as an anode material for lithium-ion batteries, cannot meet the needs of sodium-ion batteries. Therefore, it is necessary to find a suitable anode material for sodium-ion batteries

Method used

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  • Iron-copper-tin ternary selenide nano material for sodium-ion battery and preparation method of iron-copper-tin ternary selenide nano material
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  • Iron-copper-tin ternary selenide nano material for sodium-ion battery and preparation method of iron-copper-tin ternary selenide nano material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 1.60 mmol of iron dichloride, 0.20 mmol of copper dichloride, and 0.20 mmol of tin dichloride, dissolve them in 20 mL of deionized water, and after they are completely dissolved, add 1.8 g of citric acid, and continue to stir; then, add 3 mmol sodium selenite, 1 mmol selenium powder, and then add 30 mL of deionized water to form a mixed solution; after ultrasonic stirring for 2 to 3 hours, in vigorous stirring, add 10 mL of hydrazine hydrate dropwise to form a suspension; The turbid liquid was transferred to a 100 mL reaction kettle and reacted at 160 °C for 15 hours; after the reaction, the reaction product was obtained by centrifugation, repeatedly washed with deionized water and ethanol for 3 to 5 times, and dried at 70 °C for 12 hours. The desired product is obtained, which is an iron-copper-tin ternary selenide nanomaterial.

Embodiment 2

[0026] Weigh 1.58 mmol of ferric chloride, 0.19 mmol of copper dichloride, and 0.19 mmol of tin dichloride, and dissolve them in 19 mL of deionized water. After they are completely dissolved, add 2.0 g of citric acid and continue to stir; then, add 2.8 g of citric acid. mmol sodium selenite, 1.1 mmol selenium powder, and then add 28 mL of deionized water to form a mixed solution; after ultrasonic stirring for 2 to 3 hours, in vigorous stirring, add 9 mL of hydrazine hydrate dropwise to form a suspension; The suspension was transferred to a 100 mL reactor and reacted at 140 °C for 12 hours; after the reaction, the reaction product was obtained by centrifugation, washed with deionized water and ethanol repeatedly for 3 to 5 times, and dried at 70 °C for 12 hours , the desired product is obtained, which is an iron-copper-tin ternary selenide nanomaterial.

Embodiment 3

[0028]Weigh 1.62 mmol of iron dichloride, 0.21 mmol of copper dichloride, and 0.21 mmol of tin dichloride, and dissolve them in 21 mL of deionized water. After they are completely dissolved, add 2.1 g of citric acid and keep stirring; then, add 3.2 g of citric acid. mmol sodium selenite, 0.9 mmol selenium powder, and then add 32 mL of deionized water to form a mixed solution; after ultrasonic stirring for 2 to 3 hours, in vigorous stirring, add 11 mL of hydrazine hydrate dropwise to form a suspension; The suspension was transferred to a 100 mL reaction kettle and reacted at 180 °C for 18 hours; after the reaction, the reaction product was obtained by centrifugation, repeatedly washed with deionized water and ethanol for 3 to 5 times, and dried at 70 °C for 12 hours , the desired product is obtained, which is an iron-copper-tin ternary selenide nanomaterial.

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Abstract

The invention discloses an iron-copper-tin ternary selenide nano material for a sodium ion battery, which takes FeSe2 as a matrix and has a FeSe2 type phase structure. Two transition metal elements of Cu and Sn are uniformly dispersed in FeSe2; the microcosmic shape is a nano-polyhedron stacked shape, and fine nano-particles are attached to the surfaces of part of nano-polyhedrons. The invention also discloses a preparation method of the nano material, which comprises the following steps: taking dichloride as a transition metal source, taking water as a solvent, adding citric acid, and continuously stirring to homogenize a precursor solution; adding a selenium source sodium selenite and selenium powder, dropwise adding hydrazine hydrate, and then carrying out hydrothermal reaction to obtain the nano material. According to the invention, multi-component compounding of the selenide is realized, and the multi-component metal selenide with uniformly distributed transition metal elements is formed. The iron-copper-tin ternary selenide nano material is used as an electrode material to assemble a sodium ion battery, and the sodium ion battery has the advantages of ultra-long cycle life, ultra-fast charge characteristic and ultra-wide temperature range working characteristic.

Description

technical field [0001] The invention belongs to the fields of nanomaterials and energy, and in particular relates to a multicomponent selenide nanomaterial and a preparation method thereof, which can be used as electrode materials for high-performance sodium ion batteries. Background technique [0002] With the economic growth, the energy crisis and environmental pollution problems in the 21st century are becoming more and more serious. In order to meet our future energy needs, clean energy should be developed to replace traditional fossil fuels, such as solar energy, wind energy, nuclear energy, biomass energy and tidal energy, etc. A new type of environmentally friendly energy. However, these green energy sources are unstable and cannot be directly used by the people. Energy storage devices are needed to store and convert the output into stable energy that can be directly used by the people. Rechargeable secondary ion batteries have been widely studied and applied due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/00H01M4/36H01M4/58H01M10/054
CPCC01B19/007H01M4/362H01M4/58H01M10/054H01M2004/028C01P2002/72C01P2004/03C01P2004/61C01P2006/40Y02E60/10
Inventor 吕建国陈栋梁田杨陈鸿文
Owner ZHEJIANG UNIV
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