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A high specific capacity mos2/mn2o3 nano hollow sphere composite electrode material and its preparation method and application

A high specific capacity, composite electrode technology, applied in the direction of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of short power time, difficult to achieve peeling effect, easy agglomeration, etc., to achieve performance enhancement, strong capacitance performance, highly operable effect

Active Publication Date: 2019-06-25
JIANGSU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A suitable solvent is beneficial to the prepared monolayer MoS 2 The nanosheets are dispersed and not easy to agglomerate; the choice of exfoliation temperature, cell pulverization power and time is the key to the preparation of monolayer MoS 2 The key to nanosheets is that the temperature is too high and it is easy to agglomerate, and the power time is too short to achieve the peeling effect

Method used

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  • A high specific capacity mos2/mn2o3 nano hollow sphere composite electrode material and its preparation method and application
  • A high specific capacity mos2/mn2o3 nano hollow sphere composite electrode material and its preparation method and application
  • A high specific capacity mos2/mn2o3 nano hollow sphere composite electrode material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First of all, ensure that the production area and equipment are clean and dry, and the utensils used are cleaned and disinfected.

[0034] This example prepares monolayer MoS with high specific capacity 2 / Mn 2 o 3 The method for nano hollow sphere composite electrode comprises the steps:

[0035] (1) Three layers of Mn 2 o 3 Preparation of hollow spheres: configuration density is 0.1155 g.ml -3 The sucrose aqueous solution was poured into a 150 mL polytetrafluoroethylene / stainless steel hydrothermal reaction kettle according to the filling of 0.6, the reaction temperature was 190 °C, and the reaction time was 120 min. After the reaction kettle was cooled to room temperature, it was centrifuged and washed with ethanol and water until the solution became transparent, and the precipitate was dried in a blast drying oven at 80 °C for 12 hours. Finally, the obtained carbon sphere powder was ground to fineness for replacement; 25 mM Mn ( AC) 2 .4H 2 O aqueous solutio...

Embodiment 2

[0039] The basic steps are the same as in Example 1, the difference is that the monolayer MoS is prepared 2 Nanosheet process, MoS 2 The mass density of the NMP (nitrogen-methylpyrrolidone) dispersion is 2.5 mg / mL.

Embodiment 3

[0041] The basic steps are the same as in Example 1, the difference is that the monolayer MoS is prepared 2 Nanosheet process, MoS 2 The mass density of the NMP (nitrogen-methylpyrrolidone) dispersion is 12.5 mg / mL.

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Abstract

The invention relates to a high-specific-capacity MoS2 / Mn2O3-nanometer-hollow-ball composite electrode material and a preparing method and application thereof. The preparing method includes the stepsthat a three-layer Mn2O3 hollow ball with the maximal specific capacity serves as a reactant; dispersion and exfoliation are carried out in an organic solvent with the mechanical exfoliation method toobtain single-layer MoS2; a strongly-basic solution is added into a mixed NMP solution of the single-layer MoS2 nanometer sheet and the three-layer Mn2O3 hollow ball to contend surface protons of thesingle-layer MoS2 nanometer sheet, and a single-layer MoS2 / Mn2O3-nanometer-hollow-ball electrode is prepared. The high-specific-capacity MoS2 / Mn2O3-nanometer-hollow-ball composite electrode materialand the preparing method and application thereof have the advantages that the single-layer MoS2 nanometer sheet is used in the composite electrode, and the composite electrode has the large specific area, and provides more active sites for a psedocapacitance reaction; through the advantages of the hollow structure of the three-layer Mn2O3 hollow ball, compared with a traditional electrode material, the composite electrode material has the super-high capacitive performance, and meanwhile the high-specific-capacity MoS2 / Mn2O3-nanometer-hollow-ball composite electrode material is easy to prepare,convenient to store, long in cycle life and high in operability.

Description

technical field [0001] The invention belongs to the field of electrode materials, in particular to a high specific capacity MoS 2 / Mn 2 o 3 Nano hollow sphere composite electrode material and its preparation method and application. Background technique [0002] Due to its high energy and power density, supercapacitors are now the focus of new energy development. Electrode material is one of the key factors affecting the capacitance performance of supercapacitors. At present, most of the electrode materials of pseudocapacitor supercapacitors use RuO 2 , RhO x Such precious metal oxides have high specific capacitance performance, but due to the limited mineral resources of precious metals, the application range is small, and they are not suitable for large-scale production. Representative MoS of transition metal dichalcogenides (TMDs) 2 Because of its two-dimensional shape advantage, it has a large specific surface area and provides more active sites for the Faraday pse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/26H01G11/30H01G11/46H01G11/86
CPCY02E60/13
Inventor 丹媛媛孙园园卢晨陈泽安陈广亮雷磊
Owner JIANGSU UNIV OF SCI & TECH
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