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Zn-Cu-Se composite material as well as preparation method and application thereof

A zn-cu-se, composite material technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, binary selenium/tellurium compounds, etc., which can solve the problems of low synthesis efficiency and unsatisfactory electrochemical performance. , to achieve high energy density and power density, improve electrochemical performance, and promote the effect of flow diffusion

Active Publication Date: 2020-06-23
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrochemical performance of the existing zinc selenide copper compounds is not particularly ideal, and the synthesis efficiency is low

Method used

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  • Zn-Cu-Se composite material as well as preparation method and application thereof
  • Zn-Cu-Se composite material as well as preparation method and application thereof
  • Zn-Cu-Se composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of Zn-Cu-Se composite material includes the following steps:

[0033] Add 1mmol Zn(NO 3 ) 2 ·6H 2 O, 1mmol Cu(CH 3 COO) 2 ·H 2 O, 6mmol NH 4 F, 5mmol urea was dissolved in 40mL water, after magnetic stirring, transferred to a 50mL polytetrafluoroethylene lined stainless steel autoclave for one-step hydrothermal reaction, the hydrothermal reaction temperature was 180℃, and the hydrothermal reaction time was 6h; The hydrothermal samples were taken out and cooled, then centrifuged, washed, and vacuum dried at 60°C for 12 hours to obtain the Zn-Cu precursor. The Zn-Cu precursor prepared above and 60 mg of sodium selenite were dissolved in water and dispersed by magnetic stirring, and then 2 mL of ammonia was added to form a uniform suspension, and then the second hydrothermal reaction was carried out. The hydrothermal reaction temperature was 140°C. After the hydrothermal reaction time is 8 hours, the Zn-Cu-Se composite material is obtained by centrifugati...

Embodiment 2

[0039] A preparation method of Zn-Cu-Se composite material includes the following steps:

[0040] Add 1mmol Zn(NO 3 ) 2 ·6H 2 O, 0.5mmol Cu(CH 3 COO) 2 ·H 2 O, 6mmol NH 4 F, 5mmol urea was dissolved in 40mL water, after magnetic stirring, transferred to a 50mL polytetrafluoroethylene lined stainless steel autoclave for one-step hydrothermal reaction, the hydrothermal reaction temperature was 180℃, and the hydrothermal reaction time was 6h; The hydrothermal samples were taken out and cooled, then centrifuged, washed, and vacuum dried at 60°C for 12 hours to obtain the Zn-Cu precursor. The Zn-Cu precursor prepared above and 60 mg of sodium selenite were dissolved in water and dispersed by magnetic stirring, and then 2 mL of ammonia was added to form a uniform suspension, and then the second hydrothermal reaction was carried out. The hydrothermal reaction temperature was 140°C. After the hydrothermal reaction time is 8 hours, the Zn-Cu-Se composite material is obtained by centrifuga...

Embodiment 3

[0043] A preparation method of Zn-Cu-Se composite material includes the following steps:

[0044] Add 1mmol Zn(NO 3 ) 2 ·6H 2 O, 2mmol Cu(CH 3 COO) 2 ·H 2 O, 6mmol NH 4 F, 5mmol urea was dissolved in 40mL water, after magnetic stirring, transferred to a 50mL polytetrafluoroethylene lined stainless steel autoclave for one-step hydrothermal reaction, the hydrothermal reaction temperature was 180℃, and the hydrothermal reaction time was 6h; The hydrothermal samples were taken out and cooled, then centrifuged, washed, and vacuum dried at 60°C for 12 hours to obtain the Zn-Cu precursor. The Zn-Cu precursor prepared above and 60 mg of sodium selenite were dissolved in water and dispersed by magnetic stirring, and then 2 mL of ammonia was added to form a uniform suspension, and then the second hydrothermal reaction was carried out. The hydrothermal reaction temperature was 140°C. After the hydrothermal reaction time is 8 hours, the Zn-Cu-Se composite material is obtained by centrifugati...

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Abstract

The invention relates to a Zn-Cu-Se composite material and a preparation method and application thereof. The preparation method of the Zn-Cu-Se composite material comprises the following steps: (1), dissolving soluble zinc salt, soluble copper salt, urea and ammonium fluoride in water, performing a primary hydrothermal reaction after even stirring, and obtaining a Zn-Cu precursor through centrifugation, washing and drying; and (2) dissolving the prepared Zn-Cu precursor and sodium selenite in water, stirring and dispersing, adding ammonia water to form a uniform suspension, carrying out a second hydrothermal reaction, and obtaining the Zn-Cu-Se composite material through centrifuging, washing, and drying. Compared with the prior art, the Zn-Cu-Se composite material is synthesized through two-step hydrothermal synthesis, the composite material has good electrochemical performance, the preparation method of the composite material is simple and environmentally friendly, and the synthesistime is greatly shortened.

Description

Technical field [0001] The invention belongs to the technical field of electrochemistry and nanomaterials, and relates to a Zn-Cu-Se composite material and a preparation method and application thereof. Background technique [0002] Various types of batteries such as supercapacitors, lithium ion batteries, lithium batteries, metal-air batteries, and fuel cells are considered to be the most efficient advanced energy storage systems. Compared with batteries, supercapacitors have many advantages such as strong charge and discharge capacity, high power density, and strong capacity sustainability, and have broader application prospects. However, traditional electric double layer capacitors (EDLCs) are limited due to their low energy. This problem can be effectively solved by replacing traditional carbon electrode materials with pseudo-capacitive materials, which can store and Release more charge. In addition, pseudo-capacitive materials can be used to construct water-based asymmetric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86C01B19/04B82Y40/00
CPCB82Y40/00C01B19/007C01P2004/03C01P2004/82H01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 蔺华林刘顺昌朱贤胡晓敏李梦琰严春阳陈哲吴俊杰韩生
Owner SHANGHAI INST OF TECH
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