Spinel type nanocrystalline material and preparation method and application thereof

A nanocrystalline material and spinel-type technology, applied in nanotechnology, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as the difficulty in preparing spinel-type oxides, and achieve breakthroughs in electrochemical performance and high specific capacity , The effect of simple process

Inactive Publication Date: 2019-11-26
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The structures of nanomaterials prepared by the above method include nanowires, nanosheets, nanoflowers, etc., and their sizes are usually above 20 nanometers, and can even reach micron levels (Yuan, C. Z., Wu. H. B., et al. Mixed

Method used

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  • Spinel type nanocrystalline material and preparation method and application thereof
  • Spinel type nanocrystalline material and preparation method and application thereof
  • Spinel type nanocrystalline material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 1.5 mmol commercial grade cobalt acetate tetrahydrate and 3 mmol commercial grade manganese acetate tetrahydrate, add 225 mL ethanol and 1.5 mL ammonia water, mix well in a 250 mL three-necked flask, and heat the reaction system in a hot oil bath at 80 °C for 2 h. After the reaction was completed, the reaction system was cooled to room temperature, and the obtained solution was transferred to a polytetrafluoroethylene liner of a small laboratory reactor, and the reactor was heated in a blast oven at 150 °C for 10 h. After the reaction is over, wait for the reaction system to cool down to room temperature, transfer the obtained product to a Buchner funnel, cover the inside of the funnel with an organic microporous filter membrane (0.22 μm in pore size), add ethanol to fill the funnel volume, and filter until it is completely drained. Wash solution, repeat 3 times. The washed product was transferred to filter paper and dried in a forced air oven at 60 °C for 12 h to...

Embodiment 2

[0026] Weigh 4.5 mmol of commercial grade manganese acetate tetrahydrate, add 225 ml of ethanol and 1.5 mL of ammonia water, mix well in a 250 mL three-necked flask, and heat the reaction system in a hot oil bath at 80 °C for 2 h. After the reaction was completed, the reaction system was cooled to room temperature, and the obtained solution was transferred to a polytetrafluoroethylene liner of a small laboratory reactor, and the reactor was heated in a blast oven at 150° C. for 10 h. After the reaction is over, wait for the reaction system to cool down to room temperature, transfer the obtained product to a Buchner funnel, cover the inside of the funnel with an organic microporous filter membrane (0.22 μm in pore size), add ethanol to fill the funnel volume, and filter until it is completely drained. Wash solution, repeat 3 times. The washed product was transferred to filter paper and dried in a forced air oven at 60 °C for 12 h to obtain Mn 3 o 4 Nanocrystalline powder, the...

Embodiment 3

[0028] A kind of water system secondary zinc ion battery, this water system secondary zinc ion battery cathode material adopts the CoMn described in embodiment 1 2 o 4 Nanocrystalline. Weigh the positive electrode material CoMn with a mass ratio of 7:2:1 2 o 4 Nanocrystals, conductive agent acetylene black and binder PVDF, the positive electrode material Mn 3 o 4 The nanocrystals and conductive agent acetylene black were thoroughly ground in a mortar, PVDF was placed in a small beaker, NMP was added and stirred for 1 hour until completely dissolved. Add the ground mixture into the dissolved PVDF, add appropriate amount of NMP to make the viscosity appropriate, and stir for 8 hours. Coat the slurry on 10 μm 304L stainless steel foil or carbon paper with an areal density of about 2mg / cm 2 , dried in a vacuum oven at 80° C. for 12 hours, cooled to room temperature, and cut into circular positive electrode pieces with a diameter of 15 mm.

[0029] The above-mentioned circul...

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Abstract

The invention belongs to the technical field of chemical materials, in particular to a spinel type nanocrystalline material and a preparation method and application thereof. The method comprises preparing spinel type nanocrystals through a chemical liquid phase synthesis and a solvothermal synthesis process, and washing and drying to obtain powder. The prepared spinel-type nanocrystal has a size of 4-10 nm, that general formula is AB2O4, wherein A is one of Mn, Co, Zn and Ni; B is one of Mn and Co. The invention has the advantages of simple process, universality, uniform and controllable nanocrystalline morphology, and great application prospect in the fields of univalent and multivalent ion batteries, supercapacitors, photocatalysis and the like. A water system secondary zinc ion batteryassembled by adopting the spinel type nanocrystalline prepared by the invention as a positive electrode material has high specific capacity and excellent zinc ion storage performance.

Description

technical field [0001] The invention belongs to the technical field of chemical material synthesis, and in particular relates to a spinel nanocrystal and a preparation method thereof, and an application in a water system secondary zinc ion battery. Background technique [0002] With the rapid development of social economy and science and technology, problems in resource utilization and environmental pollution have become increasingly prominent. The development and utilization of various new energy sources has become increasingly urgent, and the corresponding energy storage materials and energy storage devices have also become research hotspots. Efficient storage can greatly improve energy utilization. Monovalent ion batteries (such as lithium, sodium, and potassium), multivalent ion batteries (such as magnesium, zinc, and aluminum) and supercapacitors are common types of high-efficiency energy storage devices. Due to the shortage of lithium resources and safety issues, mult...

Claims

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Application Information

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IPC IPC(8): C01G51/00C01G45/02H01M4/505H01M4/525H01M4/62H01M10/36B82Y40/00
CPCB82Y40/00C01G45/02C01G51/00C01P2002/72C01P2004/04C01P2004/64H01M4/505H01M4/525H01M4/621H01M4/625H01M10/36Y02E60/10
Inventor 胡林峰江乐武泽懿王亚楠田文超
Owner FUDAN UNIV
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