Molybdenum disulfide/metal oxide composite material for energy storage device electrode and preparation thereof

A technology of molybdenum disulfide and composite materials, which is used in the manufacture of hybrid capacitor electrodes, battery electrodes, and secondary batteries to achieve the effects of alleviating volume changes, tight bonding, and long cycle life.

Inactive Publication Date: 2021-02-02
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a molybdenum disulfide / metal oxide composite material for energy storage device electrodes and its preparation in order to overcome the defects of the above-mentioned metal oxides as electrode materials. The composite process of molybdenum sulfide and metal oxide is used to prepare the molybdenum disulfide / metal oxide composite material. In the composite material, the nanometer metal oxide particles are evenly distributed on the molybdenum disulfide matrix, which can effectively alleviate the volume change of the metal oxide electrode material and the The problem of poor cycle stability can be used as an ideal material for electrodes of energy storage devices

Method used

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  • Molybdenum disulfide/metal oxide composite material for energy storage device electrode and preparation thereof
  • Molybdenum disulfide/metal oxide composite material for energy storage device electrode and preparation thereof
  • Molybdenum disulfide/metal oxide composite material for energy storage device electrode and preparation thereof

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preparation example Construction

[0029] A preparation method of molybdenum disulfide / metal oxide composite material for electrodes of energy storage devices, the principle is as follows figure 1 As shown, the following steps are taken:

[0030] The first step: prepare molybdenum disulfide matrix by hydrothermal method by ammonium molybdate tetrahydrate, 1,6-hexanediamine and L-cysteine;

[0031] The second step: calcining the prepared molybdenum disulfide substrate at 900°C for 2 hours under an argon atmosphere;

[0032] The third step: the calcined molybdenum disulfide in 5% H 2 / Ar atmosphere and temperature of 750 ° C for 2 hours, and then cooled with the furnace;

[0033] Step 4: Mix 0.1mol / L tin tetrachloride pentahydrate solution with thiourea with a coordination number stoichiometric ratio of 0.83 times to form a stable metal ion complex solution;

[0034] Step 5: Mix the reduced molybdenum disulfide with the stable metal ion complex solution at a molar ratio of 1:1 and hydrothermally treat it at 17...

Embodiment 2

[0037] A method for preparing a molybdenum disulfide / metal oxide composite material for an electrode of an energy storage device. The method is as follows: using molybdenum disulfide as a matrix, firstly performing inert atmosphere calcination and in-situ reduction treatment on the matrix to generate microscopic defects in the matrix, Then compound with metal oxide to get molybdenum disulfide / metal oxide composite material.

[0038] Specifically include the following steps:

[0039] 1) Using molybdenum disulfide as a substrate, the substrate is calcined under an inert atmosphere;

[0040] 2) reducing the calcined matrix in a hydrogen atmosphere to generate microscopic defects in the matrix;

[0041] 3) Mix the reduced matrix with the metal ion complex solution, and then conduct a hydrothermal reaction to obtain a molybdenum disulfide / metal oxide composite material.

[0042] In step 1), molybdenum trioxide or molybdate is used as raw material, and the molybdenum disulfide mat...

Embodiment 3

[0047] A method for preparing a molybdenum disulfide / metal oxide composite material for an electrode of an energy storage device. The method is as follows: using molybdenum disulfide as a matrix, firstly performing inert atmosphere calcination and in-situ reduction treatment on the matrix to generate microscopic defects in the matrix, Then compound with metal oxide to get molybdenum disulfide / metal oxide composite material.

[0048] Specifically include the following steps:

[0049] 1) Using molybdenum disulfide as a substrate, the substrate is calcined under an inert atmosphere;

[0050] 2) reducing the calcined matrix in a hydrogen atmosphere to generate microscopic defects in the matrix;

[0051] 3) Mix the reduced matrix with the metal ion complex solution, and then conduct a hydrothermal reaction to obtain a molybdenum disulfide / metal oxide composite material.

[0052] In step 1), molybdenum trioxide or molybdate is used as raw material, and the molybdenum disulfide mat...

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Abstract

The invention relates to a molybdenum disulfide/metal oxide composite material for an energy storage device electrode and a preparation method thereof. The preparation method comprises the steps thatmolybdenum disulfide serves as a matrix, inert atmosphere calcination and in-situ reduction treatment are conducted on the matrix in sequence to generate microdefects in the matrix, and then the matrix is compounded with metal oxide to obtain the molybdenum disulfide/metal oxide composite material. During application, the composite material is applied to a lithium ion battery, a sodium ion battery, a lithium-sulfur battery, a supercapacitor or a hybrid capacitor. Compared with the prior art, the molybdenum disulfide/metal oxide composite material prepared by the invention has the characteristics of uniform dispersion, tight combination and controllable components, and can effectively relieve the problems of volume change and rapid capacity decline of the metal oxide in an electrode reaction.

Description

technical field [0001] The invention belongs to the technical field of preparation of energy storage materials, and relates to a molybdenum disulfide / metal oxide composite material for electrodes of energy storage devices and its preparation. Background technique [0002] The continuous improvement of the electrification level of today's society makes electronic products play an increasingly important role in human society, among which smart phones and portable computers have become necessary equipment for modern life. In addition, the widespread attention to the global climate change crisis since the last century has already become a social trend that cannot be ignored, and alternative tools such as new energy vehicles have also ushered in important opportunities for development. The development of products such as consumer electronics and new energy vehicles has put forward higher requirements for electrical energy storage devices. On the one hand, people pursue the porta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/48H01M10/052H01M10/0525H01M10/04H01G11/26H01G11/46H01G11/30H01G11/86
CPCH01G11/26H01G11/30H01G11/46H01G11/86H01M4/366H01M4/483H01M4/5815H01M10/04H01M10/052H01M10/0525Y02E60/10Y02E60/13Y02P70/50
Inventor 李尧宋家旺杨沁雅朱申敏张荻
Owner SHANGHAI JIAO TONG UNIV
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