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A stannite structure cumno 2 Morphology Control Methods of Crystalline Materials

A technology of crystal material and morphology, which is applied in the field of morphology control of spessartite structure CuMnO2 crystal material, can solve the problems of large material size, not fully reflected, unfavorable electrolyte transmission, etc.

Active Publication Date: 2021-04-27
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CuMnO synthesized by traditional high-temperature solid-state method reported so far 2 The size of the material is large and the shape is not uniform, which is very unfavorable for the transport of the electrolyte, so that the nano-effects of the electrochemical properties related to the crystal shape and size of the material cannot be fully reflected

Method used

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  • A stannite structure cumno <sub>2</sub> Morphology Control Methods of Crystalline Materials
  • A stannite structure cumno <sub>2</sub> Morphology Control Methods of Crystalline Materials
  • A stannite structure cumno <sub>2</sub> Morphology Control Methods of Crystalline Materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 Preparation of Triangular Flake CuMnO 2 crystal material

[0034] Dissolve 0.15g of cetyltrimethylammonium bromide in a mixed solution of 25ML water and 25ML ethanol, then add 5ML NaOH solution (concentration 2mol / L), and then add 2.5ML Mn(CH 3 COO) 2 4H 2 O solution (concentration 0.1mol / L) and 2.5ML Cu(NO 3 ) 2 ·3H 2 O solution (concentration 0.1 mol / L). Stir well for 2 hours until the mixture is uniform, transfer to a 100ML reactor, and react at 130-150°C for 24 hours. After the reaction, let it cool down naturally, take out the samples and wash them with water and ethanol respectively, repeat this step three times, and dry them in an oven at 70°C for 6 hours to obtain triangular flake CuMnO 2 Crystal material, denoted as 1#.

Embodiment 2

[0035] Example 2 Preparation of nanowire CuMnO 2 crystal material

[0036] Dissolve 0.15g of cetyltrimethylammonium bromide in a mixed solution of 25ML water and 25ML ethanol, then add 5ML NaOH solution (concentration 2mol / L), and then add 2.5ML Mn(CH 3 COO) 2 4H 2 O solution (concentration 0.1mol / L) and 2.5ML Cu(NO 3 ) 2 ·3H 2 O solution (concentration 0.1 mol / L). Stir well for 2 hours until the mixture is uniform, transfer to a 100ML reactor, and react at 150-170°C for 24 hours. After the reaction, wait for it to cool naturally, take out the sample and wash it with water and ethanol respectively, repeat this step three times, and dry it in a 70°C oven for 6 hours to obtain nanowire-like CuMnO 2 The crystal material is recorded as 2#.

Embodiment 3

[0037] Example 3 Preparation of hexagonal prism CuMnO 2 crystal material

[0038]Dissolve 0.15g of cetyltrimethylammonium bromide in a mixed solution of 25ML water and 25ML ethanol, then add 5ML NaOH solution (concentration 2mol / L), and then add 2.5ML Mn(CH 3 COO) 2 4H 2 O solution (concentration 0.1mol / L) and 2.5ML Cu(NO 3 ) 2 ·3H 2 O solution (concentration 0.1 mol / L). Stir well for 2 hours until the mixture is uniform, transfer to a 100ML reactor, and react at 170-190°C for 24 hours. After the reaction, let it cool down naturally, take out the sample and wash it with water and ethanol respectively, repeat this step three times, and dry it in an oven at 70°C for 6 hours to obtain hexagonal CuMnO 2 The crystal material is recorded as 3#.

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Abstract

The invention discloses a manganite structure CuMnO 2 The morphology control method of crystal materials, under alkaline conditions, metal precursors and surfactants are added to the solvent, stirred evenly, then placed in the reaction kettle for solvothermal reaction at different temperatures, and different shapes are obtained after a period of time. CuMnO 2 Materials, morphology including triangular sheets, nanowires, hexagonal prisms and octahedrons. These CuMnO 2 Crystalline materials have good electrochemical energy storage properties, among which CuMnO with nanowire morphology 2 The electrochemical active sites are the most abundant, showing the most excellent and stable energy storage performance, and have broad application prospects in the field of quasi-solid supercapacitors; the invention has the advantages of simple operation, easy control of reaction conditions, and large-scale production.

Description

technical field [0001] The invention relates to the field of synthesis of supercapacitor materials, in particular to CuMnO with manganite structure 2 Morphology control methods for crystalline materials. Background technique [0002] With the rapid development of hybrid electric vehicles and renewable energy, the development of advanced high-capacity energy storage devices has become the focus of world attention. As an energy storage device that can be charged and discharged quickly, supercapacitors have ultra-high power density and cycle stability compared with batteries, and are considered to be the most potential energy conversion and storage devices. However, they are still limited by low energy density, so pseudocapacitive materials have been extensively studied. Currently, RuO 2 Pseudocapacitive materials are widely used commercially due to their high electrical conductivity and chemical stability. However, the ultra-high cost limits its popularization. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B29/64C30B29/60C30B7/14
CPCC30B7/14C30B29/22C30B29/60C30B29/605C30B29/64H01G11/46Y02E60/13
Inventor 李广社付思贤李莉萍景元成
Owner JILIN UNIV
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