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Preparation method of carbon-nitrogen-codoped NiFe2O4-Ni nanocomposite material with cubic structure

A nano-cube and composite material technology, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, etc., can solve the problems of low conductivity and rate, low specific capacitance, etc., and achieves fewer synthesis steps, simple operation methods, The effect of excellent electrochemical performance

Inactive Publication Date: 2016-08-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional electric double layer capacitors are mainly carbon materials with high specific surface area, which are characterized by superior stability in structure and performance, good electrical conductivity, high cycle life, and good rate capability. At the same time, they are widely sourced, cheap, and easy to synthesize. , and its relatively low specific capacitance limits its application and development
Pseudocapacitive materials mainly include metal oxides or hydroxides, which are characterized by high specific capacity, but lower conductivity and rate than carbon materials.

Method used

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  • Preparation method of carbon-nitrogen-codoped NiFe2O4-Ni nanocomposite material with cubic structure
  • Preparation method of carbon-nitrogen-codoped NiFe2O4-Ni nanocomposite material with cubic structure
  • Preparation method of carbon-nitrogen-codoped NiFe2O4-Ni nanocomposite material with cubic structure

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Embodiment 1

[0035] A carbon-nitrogen co-doped NiFe 2 o 4 The preparation method of / Ni nano cubic structure composite material, concrete steps are as follows:

[0036] (1) Synthesis and preparation of the precursor: Take 100ML aqueous solution, add 0.267g nickel acetate, 4g PVP, 0.1g sodium citrate and fully stir to dissolve. Take another 100ML aqueous solution and add 1.3g potassium ferricyanate solid, stir well to dissolve. Slowly add the potassium ferricyanate solution dropwise into the nickel acetate solution, stir for 30min and then place it at room temperature. After 24 hours, centrifuge, wash with water and alcohol for three times, then dry and set aside.

[0037] (2) Calcination process: Weigh a certain amount of precursor with an analytical balance, place it in a porcelain boat and put it into a tube furnace, inject nitrogen protective gas, and set a heating program. The heating rate is 1°C / min. Raise the temperature to 300°C for 2 hours and then cool down to room temperatur...

Embodiment 2

[0046] A carbon-nitrogen co-doped NiFe 2 o 4 The preparation method of / Ni nano cubic structure composite material, concrete steps are as follows:

[0047] (1) Synthesis and preparation of the precursor: Take 100ML aqueous solution, add 0.267g nickel acetate, 4g PVP, 0.1g sodium citrate and fully stir to dissolve. Take another 100ML aqueous solution and add 1.3g potassium ferricyanate solid, stir well to dissolve. Slowly add the potassium ferricyanate solution dropwise into the nickel acetate solution, stir for 30min and then place it at room temperature. After 24 hours, centrifuge, wash with water and alcohol for three times, then dry and set aside.

[0048] (2) Calcination process: Weigh a certain amount of precursor with an analytical balance, place it in a porcelain boat and put it into a tube furnace, inject nitrogen protective gas, and set a heating program. The heating rate is 1°C / min. Respectively raise the temperature to 300°C, 350°C, and 400°C for 2 hours, then ...

Embodiment 3

[0051] A carbon-nitrogen co-doped NiFe 2 o 4 The preparation method of / Ni nano cubic structure composite material, concrete steps are as follows:

[0052] (1) Precursor synthesis and preparation: Weigh 0.142g nickel acetate and 0.25g sodium citrate dissolved in 100ML aqueous solution to prepare solution A; weigh 0.07g potassium ferricyanate and 0.3g PVP dissolved in 100ML aqueous solution to prepare solution B . Slowly add solution B to solution A under stirring conditions, continue stirring for 30 min after the dropwise addition, stop stirring, and let stand at room temperature for 20 h. Centrifuge, wash with water, and wash with ethanol three times each, then dry and set aside.

[0053] (2) Calcination process: Weigh a certain amount of precursor with an analytical balance, place it in a porcelain boat and put it into a tube furnace, inject nitrogen protective gas, and set a heating program. The heating rates were 0.5°C / min, 1°C / min, and 5°C / min, respectively. Raise th...

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Abstract

The invention relates to a preparation method of a carbon-nitrogen-codoped NiFe2O4-Ni nanocomposite material with the cubic structure. The preparation method comprises the steps that firstly, a NiAc2 solution and a K3[Fe(CN)6]2 solution are prepared separately, the NiAc2 solution and the K3[Fe(CN)6]2 solution are stirred and mixed and then subjected to standing for a period of time, precipitates are generated, and centrifuging, washing and drying are conducted to obtain a Ni3[Fe(CN)6]2 nano cube material; secondly, the obtained material is put into a porcelain boat, the porcelain boat is placed in a tubular furnace, protective gas is introduced into the tubular furnace, calcining is conducted by setting a program and increasing the temperature, and after the temperature is decreased, the carbon-nitrogen-codoped NiFe2O4-Ni nanocomposite material with the cubic structure is taken out and obtained. The carbon-nitrogen-codoped NiFe2O4-Ni nanocomposite material with the cubic structure has the excellent properties when the composite material is used for a supercapacitor electrode material. Compared with the prior art, the synthesizing method is simple and easy to operate, and control over the product morphology is achieved.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanomaterials, in particular to a carbon-nitrogen co-doped NiFe 2 o 4 / Ni nano-cubic structure composite material preparation method. Background technique [0002] The rapid development of modern society and the continuous advancement of urbanization have made energy issues one of the biggest challenges people face. Energy is the basic need to meet the rapid and sustainable development of the economy. The energy problem is not only to find sufficient energy supply or improve energy utilization efficiency, but also to involve many environmental problems. Therefore, the research and development of new high-efficiency green energy has become one of the research hotspots in the energy field today. As a new type of energy storage material, supercapacitors have the advantages of fast charge and discharge speed, high power density, long cycle life, wide operating temperature range, and environmental...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/32H01G11/46H01G11/86
CPCY02E60/13H01G11/32H01G11/30H01G11/46H01G11/86
Inventor 吴庆生华楠
Owner TONGJI UNIV
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