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Preparation method and application of Mn-Co-S/Co-MOF nano material

A nanomaterial, mn-co-s technology, applied in the field of electrochemistry and nanomaterials, can solve the problems of difficult control of transition metal sulfide heterogeneous growth process, ion/electron transport delay volume, change, etc., to facilitate electron transfer , Improve electrochemical performance, reduce the effect of volume change

Active Publication Date: 2019-11-05
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application of MCS in supercapacitors has been less studied, which may be due to the difficulty in controlling the heterogeneous growth process of multi-component transition metal sulfides.
Despite their outstanding advantages, BTMS electrodes are prone to delays in ion / electron transport processes and significant volume changes during electrochemical measurements.
These effects are the bottleneck for improving rate performance and cycle stability

Method used

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  • Preparation method and application of Mn-Co-S/Co-MOF nano material
  • Preparation method and application of Mn-Co-S/Co-MOF nano material
  • Preparation method and application of Mn-Co-S/Co-MOF nano material

Examples

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Embodiment 1

[0028] 0.5mmol Mn(Ac) 2 4H 2 O, 1mmol Co(Ac) 2 4H 2 O, 120 μl CS 2 and 1ml PMDTA dissolved in 5ml methanol, called solution A. 102mg of 2-dimethylimidazole was dissolved in 5ml of methanol, called solution B. Add solution B dropwise to solution A, and after it is completely mixed, transfer the mixed solution to a 40ml polytetrafluoroethylene-lined stainless steel autoclave for hydrothermal reaction, and keep it at 180°C for 12h. After the reaction is finished, cool down, centrifuge, wash with deionized water and ethanol several times, fully grind the obtained Mn-Co-S / Co-MOF nanomaterials, and carbon black and polytetrafluoroethylene in a mass ratio of 8:1: 1 Mix, stir evenly, press-fit on a nickel foam sheet (1cm×1cm), bake at 60°C for 12h to prepare a working electrode.

[0029] Chenhua CHI760e electrochemical workstation adopts cyclic voltammetry and constant current charge and discharge methods to detect the specific capacitance and cycle stability of the material. Th...

Embodiment 2

[0031] 0.5mmol Mn(Ac) 2 4H 2 O, 1mmol Co(Ac) 2 4H 2 O, 120 μl CS 2 and 1ml of PMDTA were dissolved in 5ml of methanol, and the solution was transferred to a 40ml polytetrafluoroethylene-lined stainless steel autoclave for hydrothermal reaction and kept at 180°C for 12h. After the reaction is finished, cool down, centrifuge, wash with deionized water and ethanol several times, fully grind the obtained Mn-Co-S nanomaterials, mix with carbon black and polytetrafluoroethylene in a mass ratio of 8:1:1, and stir Uniform, pressed on a nickel foam sheet (1cm×1cm), baked at 60°C for 12h to prepare the working electrode, the biggest difference between Example 2 and Example 1 is that Example 1 synthesized Co-MOF material, and then synthesized Mn- Co-S / Co-MOF nanomaterials, while Example 2 only synthesized Mn-Co-S materials.

[0032] The Chenhua CHI760e electrochemical workstation adopts cyclic voltammetry and constant current charge and discharge methods to test the specific capacit...

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Abstract

The invention relates to a preparation method of a Mn-Co-S / Co-MOF nano material, and the method comprises the following steps: S1: sequentially dissolving manganese acetate tetrahydrate, cobalt acetate tetrahydrate, carbon disulfide and pentamethyldiethylenetriamine in methanol to obtain a solution A, and dissolving 2-methylimidazole in methanol to obtain a solution B; S2, adding the solution B into the solution A, and transferring a mixed solution of the solution B and the solution A into a reaction kettle for reaction; S3, performing centrifuging, washing and drying to obtain the Mn-Co-S / Co-MOF nano material. Compared with the prior art, the preparation method disclosed by the invention is environment-friendly, simple in process and convenient for large-scale production, and the obtainedMn-Co-S / Co-MOF nanosheet can obtain excellent electrochemical performance when being applied to an electrode material.

Description

technical field [0001] The invention relates to the technical field of electrochemistry and nanometer materials, in particular to a preparation method and application of Mn-Co-S / Co-MOF nanomaterials. Background technique [0002] MOFs are compounds with porous crystalline structures composed of metal ions and organic ligands, and their structures are diverse. In recent years, due to their highly porous ordered structure, the pyrolysis of MOFs has become a new hotspot in the field of scientific research and shows a good development prospect. MOFs can be used as adsorbents in gas adsorption and separation, and as supports for metal nanoparticles in heterogeneous catalysis. It is an important new porous material with wide applications in catalysis, energy storage and separation. Due to the diversity of metal species and organic ligands, as well as the diversity of their assembly sequence, there are many kinds of structures and shapes of MOFs. Due to their structural diversit...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/48H01G11/26H01G11/86B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/26H01G11/30H01G11/48H01G11/86Y02E60/13
Inventor 蒋继波孙瑶馨陈宇凯胡晓敏丛海山王露露刘凤茹常宾高丽康佳玲唐佳斌
Owner SHANGHAI INST OF TECH
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