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Nano needle-shaped bismuth phosphate material as well as preparation method and application thereof

A bismuth phosphate and nano-needle technology, applied in phosphates, phosphorus oxyacids, nanotechnology and other directions, can solve the problems of potassium storage capacity loss, insufficient promotion and application, etc., and achieve low equipment requirements, low operating costs, and excellent cycle performance. Effect

Inactive Publication Date: 2021-05-28
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned PIBs negative electrode material in the prior art in the process of repeatedly deintercalating potassium, bismuth phosphate (BiPO 4 ) Nanoparticles will gradually pulverize and gradually lose potassium storage capacity, which limits its popularization and application.

Method used

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  • Nano needle-shaped bismuth phosphate material as well as preparation method and application thereof
  • Nano needle-shaped bismuth phosphate material as well as preparation method and application thereof
  • Nano needle-shaped bismuth phosphate material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Dissolve 0.5mmol of bismuth nitrate pentahydrate in 50ml of ethylene glycol to form a mixed solution. Subsequently, 0.5 mmol of ammonium dihydrogen phosphate powder was slowly added to the above mixed solution. Stir magnetically at room temperature for 40 minutes, then get a clear solution, then slowly add 1mL of deionized water to the solution, stir slowly for 10 minutes, and get a cloudy solution, then put it into a Teflon liner and place it in an oven at 160°C for 24 hours , to obtain a gray solution, which was centrifuged and washed three times with absolute ethanol and once with deionized water, and then put into a blast drying oven at 120° C. for 8 hours to obtain a gray powder, which is a bismuth phosphate nanomaterial.

[0037] figure 1 Be the field emission scanning electron micrograph of the obtained bismuth phosphate nanomaterial of embodiment 1; From figure 1 It can be seen that the synthesized bismuth phosphate needle-like nanomaterials are relatively uni...

Embodiment 2

[0039] Dissolve 0.5mmol of bismuth nitrate pentahydrate in 70ml of ethylene glycol to form a mixed solution. Then 0.5 mmol of ammonium dihydrogen phosphate powder was slowly added to the above mixed solution. Stir magnetically at room temperature for 40 minutes, then obtain a clear solution, then slowly add 3 mL of deionized water to the solution, and slowly stir for 2 days to obtain a cloudy solution, then put it into a Teflon liner and place it in an oven at 160°C for 48 hours. Obtain a gray-black solution, centrifuge it, wash it with absolute ethanol for 3 times, then wash it with deionized water once, and finally wash it with absolute ethanol, then put it into a blast drying oven for 8 hours at 120°C to obtain a gray-black powder , which is bismuth phosphate nanomaterial.

[0040] Figure 6 Be the field emission scanning electron micrograph of the obtained bismuth phosphate nanomaterial of embodiment 2; From Figure 6 It can be seen that the prepared bismuth phosphate n...

Embodiment 3

[0042] Dissolve 0.5mmol of bismuth nitrate pentahydrate in 30ml of ethylene glycol to form a mixed solution. Then 0.5 mmol of ammonium dihydrogen phosphate powder was slowly added to the above mixed solution. Stir magnetically at room temperature for 40 minutes, then obtain a clear solution, then slowly add 3 mL of deionized water to the solution, and stir slowly for 10 minutes to obtain a cloudy solution, then put it into a Teflon liner and place it in an oven at 160°C for 12 hours , to obtain a light gray solution, which was centrifuged and washed three times with absolute ethanol, then once with deionized water, and finally washed with absolute ethanol, and then put into a blast drying oven at 120°C for 8 hours to obtain light gray The powder is the bismuth phosphate nanomaterial. Figure 7 It is the field emission scanning electron micrograph of the bismuth phosphate nanomaterial obtained in Example 3. From Figure 7 It can be seen that the prepared bismuth phosphate na...

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Abstract

The invention belongs to the technical field of new energy, and discloses a nano needle-shaped bismuth phosphate material as well as a preparation method and an application thereof. The bismuth phosphate material is prepared by the following steps: dissolving bismuth salt in an organic solvent, and stirring to prepare a solution A; dissolving phosphate into the solution A, and stirring to obtain a solution B; dropwise adding deionized water into the solution B, and continuously stirring to obtain a solution C; putting the raw materials into a polytetrafluoroethylene reaction liner, carrying out solvothermal reaction at 120-160 DEG C, then respectively centrifuging by using absolute ethyl alcohol and deionized water, and then drying at 80-120 DEG C, thereby obtaining the product. Bismuth phosphate is prepared by adopting a solvothermal method, then the size of a reaction sample is regulated and controlled by regulating and controlling the solvothermal reaction time and the amount of dropwise added deionized water, the method is simple and easy to implement, and the nano needle-shaped bismuth phosphate electrode material with the controllable average particle size is synthesized. The material has high specific capacity, excellent cycle performance and high rate capability.

Description

technical field [0001] The invention belongs to the technical field of new energy, and more specifically relates to a nano needle-like bismuth phosphate material and a preparation method and application thereof. Background technique [0002] Extensive use of fossil fuels has caused a series of problems such as global warming and environmental pollution. Various clean and renewable energy sources such as solar energy, hydrogen energy, and nuclear energy can well solve the above problems, and thus have attracted widespread attention. However, the above-mentioned clean and renewable energy has certain problems such as regionality, seasonality, and timeliness, so high-efficiency energy storage devices are needed to effectively store the above-mentioned energy. At present, among high-efficiency energy storage devices, lithium-ion batteries occupy a dominant position in the market due to a series of advantages such as high energy density, long cycle life, and environmental friend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/26B82Y40/00H01M4/58H01M10/054
CPCC01B25/26B82Y40/00H01M4/5825H01M10/054H01M2004/021H01M2004/027C01P2004/10C01P2004/03C01P2004/04C01P2002/72C01P2006/40Y02E60/10
Inventor 陈通张伟蓝鑫鑫吴家伟关超文黄少铭
Owner GUANGDONG UNIV OF TECH
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