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Preparation method of iron phosphide nanosheet and biomass carbon composite material and application

A biomass carbon and composite material technology, applied in electrochemical generators, electrical components, battery electrodes, etc., can solve the problems of cumbersome process and high risk factor, and achieve the effects of simple process, improved cycle life and easy implementation.

Active Publication Date: 2018-11-13
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods are not only cumbersome, but also have a high risk factor
The present invention adopts the electrodeposition method to obtain the iron phosphide nanosheet / biomass carbon composite material, and the composite material significantly improves the cycle life of the sodium ion battery, and there is no relevant report yet

Method used

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  • Preparation method of iron phosphide nanosheet and biomass carbon composite material and application
  • Preparation method of iron phosphide nanosheet and biomass carbon composite material and application
  • Preparation method of iron phosphide nanosheet and biomass carbon composite material and application

Examples

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Embodiment 1

[0025] (1) Washing the leaves of Magnolia magnolia 2-3 times with a mixed solution of acetone and water. Dry in an oven at 60°C for 2 hours. Place the blade between graphite sheets, then anneal at 800°C for 2 hours, place in 3mol KOH aqueous solution for 2 hours, and place in 1mol / L HCl aqueous solution for 10 hours.

[0026] (2) The biomass carbon film obtained in step (1) is used as a working electrode, the platinum sheet is used as a counter electrode, and silver / silver chloride is placed in a sealed electrolytic cell as a reference electrode. Containing the ferric sulfate heptahydrate of 0.72mol / L, the sodium hypophosphite of 0.36mol / L, the glycine of 0.11mol / L, in the sealed electrolytic cell of the oxalic acid mixed electrolyte of 0.005mol / L, feed nitrogen after 15 minutes, A constant potential of -1.5 V was applied to the working electrode for 30 minutes for deposition. After electrodeposition, the working electrode was washed 2-3 times with deionized water. Amorphou...

Embodiment 2

[0032] (1) Washing the leaves of Magnolia magnolia 2-3 times with a mixed solution of acetone and water. Dry in an oven at 60°C for 2 hours. Put the blade in a tube furnace, feed nitrogen protective gas with an air intake of 0.2L / min, and heat up to 800°C at a rate of 2°C / min, keep it warm for 2 hours, and then naturally cool to room temperature to obtain biomass carbon membrane. Place in 3mol KOH aqueous solution for 2 hours, then place in 1mol / L HCl aqueous solution for 10 hours.

[0033] (2) The biomass carbon film obtained in step (1) is used as a working electrode, the platinum sheet is used as a counter electrode, and silver / silver chloride is placed in a sealed electrolytic cell as a reference electrode. Containing the ferric sulfate heptahydrate of 0.36mol / L, the sodium hypophosphite of 0.72mol / L, the glycine of 0.22mol / L, in the sealed electrolytic cell of the oxalic acid mixed electrolyte of 0.005mol / L, feed nitrogen after 15 minutes, A constant potential of -1.5 ...

Embodiment 3

[0037] (1) Washing the leaves of Magnolia magnolia 2-3 times with a mixed solution of acetone and water. Dry in an oven at 60°C for 2 hours. Put the blades in a tube furnace, feed nitrogen protective gas with an air intake of 0.2L / min, heat up to 800°C at a rate of 2°C / min, keep it warm for 2 hours, and then cool it down to room temperature naturally to obtain biomass carbon membrane. Place in 3mol KOH aqueous solution for 2 hours, then place in 1mol / L HCl aqueous solution for 10 hours.

[0038] (2) The biomass carbon film obtained in step (1) is used as a working electrode, the platinum sheet is used as a counter electrode, and silver / silver chloride is placed in a sealed electrolytic cell as a reference electrode. Containing the iron sulfate heptahydrate of 0.36mol / L, the sodium hypophosphite of 1.08mol / L, the glycine of 0.44mol / L, in the sealed electrolytic cell of the oxalic acid mixed electrolyte of 0.01mol / L, feed nitrogen after 15 minutes, A constant potential of -1....

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Abstract

The invention discloses a preparation method of an iron phosphide nanosheet and biomass carbon composite material. The method comprises the following steps: compositing the iron phosphide nanosheet and a biomass carbon membrane through using an electrochemical method, to obtain an iron phosphide / biomass carbon integrated electrode without a binder. The method is simple, and convenient to operate,and the preparation cost of materials is low. The iron phosphide is firstly composited with the biomass carbon material so as to obtain the composite material for the negative electrode material of asodium-ion battery. The composite material electrode is excellent in sodium storage performance, and stable in structure.

Description

technical field [0001] The invention relates to an iron phosphide nanosheet and biomass carbon composite material and a preparation method thereof; the invention also relates to the application of the composite material as an electrode material of a sodium ion battery, belonging to the field of composite materials and electrode materials. Background technique [0002] With the development and utilization of lithium-ion batteries, the reserves of lithium elements in the earth's crust are decreasing year by year, and it is an inevitable trend to develop a new type of sodium-ion batteries that can replace lithium-ion batteries. The abundance of sodium in the earth's crust is relatively high, and the price is low. The energy storage mechanism of sodium-ion batteries is similar to that of lithium-ion batteries, which is suitable for the application of large-scale energy storage technologies such as national smart grids. The electrode material is the core of the development of sod...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/133H01M4/136H01M4/1393H01M4/1397H01M10/054
CPCH01M4/133H01M4/136H01M4/1393H01M4/1397H01M4/362H01M4/5805H01M4/583H01M10/054Y02E60/10
Inventor 李雪莹吴辉陈立庄丹媛媛方记文
Owner JIANGSU UNIV OF SCI & TECH
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