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A porous nano nife 2 o 4 And its preparation method and application

A technology of nanometer and pore-forming agent, applied in the field of porous nanometer NiFe2O4 and its preparation, can solve the problems of small specific capacity, poor cycle and rate performance, etc., and achieve the effects of low cost, excellent rate performance and simple method

Active Publication Date: 2021-09-17
LONGYAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these synthetic methods yield NiFe with different morphologies and structures 2 o 4 Electrode materials, but the obtained specific capacity is relatively small, and the cycle and rate performance are poor

Method used

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  • A porous nano nife <sub>2</sub> o <sub>4</sub> And its preparation method and application
  • A porous nano nife <sub>2</sub> o <sub>4</sub> And its preparation method and application
  • A porous nano nife <sub>2</sub> o <sub>4</sub> And its preparation method and application

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Embodiment 1

[0036] Porous nano-NiFe 2 o 4Preparation method: Weigh 0.498g (2mmol) nickel acetate tetrahydrate and 0.696g (4mmol) ferrous acetate, put into 60mL 30% ethanol aqueous solution, ultrasonically stir and disperse for 20min to form a uniform solution; then add 0.481g ( 8mmol) urea, ultrasonically stirred and dispersed for 20min to form a uniform solution; then add 0.309g (1mmol) dodecyltrimethylammonium bromide, ultrasonically stirred and dispersed for 20min to form a uniform metal mixed solution. Transfer the mixed metal solution to a stainless steel reaction kettle with a polytetrafluoroethylene liner, seal it, react at 200°C for 12 hours, cool to room temperature naturally, take out the liner, pour off the supernatant, add deionized water and transfer to a centrifuge tube, Centrifuge and wash four times with deionized water and absolute ethanol. Then put the sample obtained in the previous step in an oven at 60°C to dry for 6 hours. Finally, put the dried sample into a porc...

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Abstract

The invention discloses a porous nanometer NiFe 2 O 4 and preparation method and application thereof. In the present invention, by a hydrothermal synthesis method, nickel acetate tetrahydrate and ferrous acetate are weighed; nickel acetate tetrahydrate and ferrous acetate are mixed and stirred uniformly to obtain a mixed solution; the precipitating agent is added to the mixed solution and stirred uniformly before adding Pore-forming agent, stir again to get a metal solution, which is ready for use; seal the metal solution, react at 160 ° C ~ 240 ° C for 12 hours, cool, remove the supernatant, add deionized water to the remaining solution, and centrifuge Separation, washing, drying, calcination and cooling to obtain porous nano NiFe 2 O 4 . NiFe prepared by the present invention 2 O 4 It has a stable and regular two-dimensional porous structure with many pores and large specific surface area. It is prepared into a positive electrode of a supercapacitor, which is convenient for electrolyte penetration and electron and ion transmission, and is conducive to high current charging and discharging.

Description

technical field [0001] The present invention relates to the field of nanomaterial preparation technology and electrochemical energy storage technology, more specifically relates to a kind of porous nano NiFe 2 o 4 And its preparation method and application. Background technique [0002] At present, with the development of the world economy, people are actively developing high-performance energy conversion and storage devices in the face of energy crisis and environmental pollution. Generally, there are solar cells, lithium-ion batteries, fuel cells, supercapacitors, etc. Among them, supercapacitors, also known as electrochemical capacitors, are widely used in various electrical appliances, hybrid electric vehicles, and backup power supplies for uninterruptible power supplies because of their advantages such as high energy density, high power density, short charging time, and long life. The improvement of supercapacitor performance depends on electrode materials, current c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/46H01G11/86
CPCH01G11/24H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 黄田富张著森丘则海
Owner LONGYAN UNIV
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