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Preparation of double metal phosphide materials and preparation and application of electrode materials containing double metal phosphide materials

A technology of electrode materials and phosphides, which is applied in the preparation of electrode materials and the preparation of supercapacitor electrode materials, can solve the problems of poor rate performance, restrictions on large-scale applications, long-term cycle instability, etc., to achieve good conductivity and improve The effect of reactivity

Active Publication Date: 2021-07-23
GUIYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of material still faces the problems of poor rate performance and long-term cycle instability, which seriously restrict its large-scale application.

Method used

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  • Preparation of double metal phosphide materials and preparation and application of electrode materials containing double metal phosphide materials
  • Preparation of double metal phosphide materials and preparation and application of electrode materials containing double metal phosphide materials
  • Preparation of double metal phosphide materials and preparation and application of electrode materials containing double metal phosphide materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of bimetallic phosphide materials:

[0028] (1) Synthesis of precursor Ni-Mn-MOF: Dissolve 2,3-pyrazine diacid anhydride (0.02mol) in 16mL deionized water, dissolve it by ultrasonic at 40°C, and then add MnSO 4 (0.02mol), mix, and ultrasonic 20min to make it evenly mixed. Place in an oven at 80°C for 3 days, cool to room temperature, centrifuge the crystals, wash 3 times with ethanol and 2 times with deionized water to obtain manganese metal organic framework crystals (Mn-MOF). Soak the Mn-MOF in 50mL 1×10 -3 M Ni(NO 3 ) 2 ·6H 2 After soaking in O aqueous solution for 2 days, the nickel-modified manganese metal-organic framework (Ni-Mn-MOF) was obtained, washed with deionized water and ethanol, respectively, and dried in the air for use.

[0029] (2) Phosphating of the precursor Ni-Mn-MOF: the synthesized Ni-Mn-MOF (0.1g) was mixed with NaH 2 PO 2 ·H 2 O (1g) was placed in two quartz boats in the center of the tube furnace respectively, and nitrogen ...

Embodiment 2

[0034] Preparation of bimetallic phosphide materials:

[0035] (1) Synthesis of the precursor Ni-Mn-MOF: Dissolve 2,3-pyrazine diacid anhydride (0.01mol) in 16 mL of deionized water, dissolve it by ultrasonic at 40°C, and then add MnSO 4 (0.01mol), mix, and ultrasonic 20min to make it evenly mixed. Place in an oven and dry at 80°C for 2 days. After cooling to room temperature, the crystals are centrifuged and washed 3 times with ethanol and 2 times with deionized water to obtain manganese metal organic framework crystals (Mn-MOF). Soak the Mn-MOF in 60mL 1×10 -3 M Ni(NO 3 ) 2 ·6H 2 O, after soaking for 2 days, the nickel-modified manganese metal-organic framework (Ni-Mn-MOF) was obtained, washed with deionized water and ethanol, respectively, and dried in the air for later use.

[0036] (2) Phosphating of the precursor Ni-Mn-MOF: the synthesized Ni-Mn-MOF (0.1g) was mixed with NaH 2 PO 2 ·H2 O (1g) was placed in two quartz boats in the center of the tube furnace respect...

Embodiment 3

[0041] Preparation of bimetallic phosphide materials:

[0042] (1) Synthesis of the precursor Ni-Mn-MOF: Dissolve 2,3-pyrazine diacid anhydride (0.01mol) in 16 mL of deionized water, dissolve it by ultrasonic at 40°C, and then add MnSO 4 (0.01mol), mix, and ultrasonic 20min to make it evenly mixed. Place in an oven at 80°C for 4 days, cool to room temperature, centrifuge the crystals, wash 3 times with ethanol and 2 times with deionized water to obtain manganese metal organic framework crystals (Mn-MOF). Soak the Mn-MOF in 40mL 1×10 -3 Ni(NO 3 ) 2 ·6H 2 O, after soaking for 2 days, the nickel-modified manganese metal-organic framework (Ni-Mn-MOF) was obtained, washed with deionized water and ethanol, respectively, and dried in the air for later use.

[0043] (2) Phosphating of the precursor Ni-Mn-MOF: the synthesized Ni-Mn-MOF (0.1g) was mixed with NaH 2 PO 2 ·H 2 O (1g) was placed in two quartz boats in the center of the tube furnace respectively, and nitrogen gas was...

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Abstract

The invention discloses a double metal phosphide material and a preparation method thereof, which comprises combining 2,3-pyrazine diacid anhydride and MnSO 4 Mn metal-organic framework crystals were prepared by hydrothermal synthesis, and then soaked in Ni(NO 3 ) 2 ·6H 2 Ni-modified manganese metal-organic frameworks were prepared in O aqueous solution, and the nickel-modified manganese metal-organic frameworks were mixed with NaH 2 PO 2 ·H 2 O is prepared by low-temperature solid-phase phosphating reaction. The double metal phosphide material has large specific capacitance and good stability; at the same time, due to the large number of holes in the material, it has good electron transport capability. The present invention adopts the bimetallic phosphide material to prepare the electrode material containing the bimetallic phosphide material, and its specific capacitance is 400-1800F / g, and the capacitance retention rate is still 76% after 1600 cycles at 1A / g.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrode materials for supercapacitors, and in particular relates to a method for preparing electrode materials containing double metal phosphide materials. Background technique [0002] Supercapacitor is a new type of energy storage element between batteries and traditional capacitors. Compared with traditional energy storage elements, it has the advantages of fast charging speed, high power density, and long cycle life. It is used in new energy vehicles, rail transit, It has broad application prospects in fields such as electronic products and aerospace. The excellent performance of supercapacitors is closely related to the synthesis of electrode materials, so how to synthesize electrode materials with good performance is the focus of research in this field. [0003] Metal-organic frameworks (MOFs) are mainly composed of organic ligands containing nitrogen or oxygen, which are connected...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00H01G11/86H01G11/30
CPCC08G83/008H01G11/30H01G11/86Y02E60/13
Inventor 王壹吕淼媛严伟罗军刘渊聂胜强周婵媛
Owner GUIYANG UNIV