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Preparation method and application of copper-aluminum hydrotalcite material

A hydrotalcite, copper-aluminum technology, applied in chemical instruments and methods, copper compounds, inorganic chemistry, etc., can solve the problems of poor crystal phase and serious agglomeration of hydrotalcite, and achieve excellent electrochemical properties and high atomic conversion rate. , the effect of excellent electrochemical properties

Inactive Publication Date: 2018-04-06
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is disclosed that copper-aluminum hydrotalcites are prepared by using copper chloride and aluminum nitrate as raw materials by hydrothermal method, but the agglomeration phenomenon is serious
The patent application number of the application is 201210150905.8, which discloses a preparation method of copper-aluminum hydrotalcite. Aluminum chloride and copper hydroxide are used as raw materials to synthesize copper-aluminum hydrotalcite with good crystallinity. However, due to the instability of copper hydroxide It is easily decomposed into copper oxide and water, resulting in poor crystal phase of hydrotalcite

Method used

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  • Preparation method and application of copper-aluminum hydrotalcite material
  • Preparation method and application of copper-aluminum hydrotalcite material
  • Preparation method and application of copper-aluminum hydrotalcite material

Examples

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Embodiment 1

[0024] In this example, see Figure 1~3 , a method for preparing a copper-aluminum hydrotalcite material, comprising the steps of:

[0025] 1) Weigh 0.1 g of sodium carbonate, add it to 10 mL of ammonia solution, stir well, dissolve it in deionized water to 100 mL, and remove the oxygen in the mixed solution with nitrogen gas;

[0026] 2) Weigh 0.96 g of copper nitrate and 7.5 g of aluminum nitrate to prepare a mixed solution of copper nitrate and aluminum nitrate, dissolve it in deionized water to 100 mL, and remove the oxygen in the mixed solution with nitrogen gas;

[0027] 3) Mix 150 mg of sodium citrate with 300 mg of copper nitrate, add 10 ml of ethanol, and add 30 ml of deionized water to prepare a mixed ethanol aqueous solution of sodium citrate and copper nitrate, dissolve sodium citrate and copper nitrate Afterwards, Na is obtained by the reaction 2 [Cu(C 6 h 4 o 7 )] solution, the Na 2 [Cu(C 6 h 4 o 7 )] solution into the three-necked flask, under the prote...

Embodiment 2

[0040] This embodiment is basically the same as Embodiment 1, especially in that:

[0041] In this embodiment, a method for preparing a copper-aluminum hydrotalcite material comprises the following steps:

[0042] 1) Weigh 0.25 g of sodium carbonate, add it to 20 mL of ammonia solution, stir well, dissolve it in deionized water to 100 mL, and remove oxygen in the mixed solution with nitrogen gas;

[0043] 2) Mix 1.8 g of copper nitrate and 14.76 g of aluminum nitrate, dissolve in deionized water to 100 mL, and remove oxygen in the mixed solution with nitrogen gas;

[0044] 3) Mix 200 mg of sodium citrate with 300 mg of copper nitrate, add 15 mL of ethanol, and add 30 ml of deionized water. After dissolving sodium citrate and copper nitrate, Na 2 [Cu(C 6 h 4 o 7 )] solution, the Na 2 [Cu(C 6 h 4 o 7 )] solution into the three-necked flask, under the protection of nitrogen, the mixed solutions prepared in the step 1) and step 2) were passed through the partial pressure f...

Embodiment 3

[0049] This embodiment is basically the same as the previous embodiment, and the special features are:

[0050] In this embodiment, a method for preparing a copper-aluminum hydrotalcite material comprises the following steps:

[0051] 1) Weigh 0.15 g of sodium carbonate, add it to 15 mL of ammonia solution, stir well, dissolve it in deionized water to 100 mL, and remove oxygen in the mixed solution with nitrogen gas;

[0052] 2) Mix 1.5 g of copper nitrate and 12.3 g of aluminum nitrate, dissolve in deionized water to 100 mL, and remove oxygen in the mixed solution with nitrogen gas;

[0053] 3) Mix 200 mg of sodium citrate with 300 mg of copper nitrate, add 15 mL of ethanol, and add 30 ml of deionized water. After dissolving sodium citrate and copper nitrate, Na 2 [Cu(C 6 h 4 o 7 )] solution, the Na 2 [Cu(C 6 h 4 o 7 )] solution into the three-necked flask, under the protection of nitrogen, the mixed solutions prepared in the step 1) and step 2) were passed through th...

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Abstract

The invention discloses a preparation method and application of a copper-aluminum hydrotalcite material. The preparation steps are as follows: first, take an ammonia solution, add sodium carbonate and stir to form a mixed lye; then prepare copper nitrate and aluminum nitrate copper aluminum ions The mixed solution is added dropwise to the mixed ethanol aqueous solution of sodium citrate and copper nitrate, and mechanically stirred continuously. The pH value of the mixed solution is adjusted with acid, then crystallized, and then centrifuged to obtain a solid sample, then repeatedly washed and dried to obtain a hydrotalcite-like precursor, and then calcined to obtain Cu-Al-CuO-C hydrotalcite-like. The copper-aluminum hydrotalcite material of the invention has good supercapacitive properties, and can be used as an electrode material for supercapacitors. The raw materials used in the invention are cheap and easy to obtain, and the Na2[Cu(C6H7O5)] coordination compound is synthesized for the first time, the atomic conversion rate is high, and the industrialization cost is reduced.

Description

technical field [0001] The invention relates to a preparation process of an electrode material, in particular to a preparation method and application of a hydrotalcite-like material, which is applied in the technical field of supercapacitor electrode materials. Background technique [0002] Supercapacitor is a new type of energy storage and energy-saving device between traditional capacitors and rechargeable batteries. It not only has the characteristics of fast charging and discharging of capacitors, but also has the energy storage mechanism of electrochemical batteries. Compared with traditional capacitors, supercapacitors have the characteristics of high power density, long cycle life, no pollution, wide operating temperature range, etc., and their applications in power supplies and other fields have attracted more and more attention. According to different energy storage mechanisms, supercapacitors can be divided into electric double layer supercapacitors and Faraday qu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30C01G3/00
CPCY02E60/13
Inventor 方建慧李宏沈霞
Owner SHANGHAI UNIV
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