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WS2-MoS2-C composite negative pole material and preparation method thereof

A ws2-mos2-c, negative electrode material technology, applied in nanotechnology for materials and surface science, battery electrodes, electrical components, etc., can solve the problems of high production cost, low output, complex preparation process, etc. Low cost, convenient operation and simple preparation process

Active Publication Date: 2015-04-29
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nanomaterials prepared by these methods have some disadvantages, such as high production cost, low yield, and complicated preparation process, which greatly limit their application.

Method used

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  • WS2-MoS2-C composite negative pole material and preparation method thereof
  • WS2-MoS2-C composite negative pole material and preparation method thereof
  • WS2-MoS2-C composite negative pole material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of composite anode material 1:

[0035] First, the WS 2 Powder raw material 1.5g, MoS 2 1.5 grams of powder raw materials, 2 grams of graphite powder, a total of 5 grams of raw materials are put into a 250ml stainless steel grinding tank, and at the same time, 150 grams of stainless steel metal grinding balls (ball-to-material ratio: 30:1) are also put into the above-mentioned grinding tank. 1 bar of argon (Ar) for protection. Then, the ball milling tank (that is, the above-mentioned grinding tank) filled with the balls is placed on the ball mill for ball milling. The specific ball milling conditions are as follows: the ball milling speed is 400 rpm, and the ball milling time is 20 hours. After ball milling, the nanocomposite anode material 1 (WS 2 ) 0.3 (MoS 2 ) 0.3 C 0.4 . The purity of the nano-composite negative electrode material 1 is determined to be 99% by XRD method.

[0036] For the transmission electron microscope photo of the sample after ball millin...

Embodiment 2

[0040] Preparation of composite anode material 2:

[0041] First, the WS 2 Powder raw material 0.5g, MoS 2 3 grams of powder raw materials, 1.5 grams of graphite powder, a total of 5 grams of raw materials are put into a 250ml stainless steel grinding tank, and at the same time, 200 grams of stainless steel metal grinding balls (ball-to-material ratio: 40:1) are also put into the above-mentioned grinding tank. 5bar argon (Ar) for protection. Then, the ball milling jar filled with the balls is placed on the ball mill for ball milling. The specific ball milling conditions are as follows: the ball milling speed is 500 rpm, and the ball milling time is 40 hours. After ball milling, the nanocomposite anode material 2 (WS 2 ) 0.1 (MoS 2 ) 0.6 C 0.3 . The purity of the nano-composite negative electrode material 2 determined by XRD method is 99%.

[0042] In the sample after ball milling, WS 2 , MoS 2 The particle size is in the range of 16-58 nanometers, nano WS 2 , MoS 2 The particles ...

Embodiment 3

[0046] Preparation of composite anode material 3:

[0047] First, the WS 2 Powder raw material 0.5g, MoS 2 3.5 grams of powder raw materials, 1 gram of graphite powder, a total of 5 grams of raw materials are put into a 250ml stainless steel grinding tank. At the same time, 250 grams of stainless steel metal grinding balls (ball-to-material ratio: 50:1) are also put into the above-mentioned grinding tank. 5bar argon (Ar) for protection. Then, the ball milling jar filled with the balls is placed on the ball mill for ball milling. The specific ball milling conditions are as follows: the ball milling speed is 500 rpm, and the ball milling time is 60 hours. After ball milling, nanocomposite anode material 3 (WS 2 ) 0.1 (MoS 2 ) 0.7 C 0.2 . The purity of the nanocomposite negative electrode material 3 determined by XRD method is 99%.

[0048] In the sample after ball milling, WS 2 , MoS 2 The particle size is in the range of 12-56 nanometers, nano WS 2 , MoS 2 The particles are unifor...

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Abstract

The invention discloses a WS2-MoS2-C composite negative pole material and a preparation method thereof. The material is expressed as the following structural formula: (WS2)x(MoS2)yCz and is formed by compounding nano-WS2, nano-MoS2 and nano-graphite particles, wherein the particle size of nano-WS2 and nano-MoS2 is 10-60nm, nano-WS2 and nano-MoS2 are uniformly distributed in a graphite matrix and coated by the graphite matrix, x, y and z in the structural formula represent the mass percent of each of WS2, MoS2 and graphite in the composite negative pole material, and x, y and z simultaneously meet the following relations: x+y+z=1, (x+y) / z is not less than 1, x is not equal to 0, and y is not equal to 0. The composite negative pole material is prepared by taking tungsten disulfide powder, molybdenum disulfide powder and graphite powder as raw materials and adopting a mechanical ball milling method. The material has a relatively large specific surface area and good electrochemical properties.

Description

Technical field [0001] The invention belongs to the technical field of preparation of lithium ion battery electrode materials, and specifically relates to a WS 2 -MoS 2 -C composite anode material and its preparation method. Background technique [0002] With the rapid development of science and technology today, energy and environmental protection have become the most concerned topics of the whole society. Efficient and sustainable green energy is the trend of future development. If mankind wants to maintain sustainable economic development, maintain ecological balance, and prevent industrial civilization from declining, it must completely solve the energy problem and find a new energy system that is efficient, environmentally friendly and sustainable. Lithium-ion secondary batteries have significant advantages such as high discharge voltage, high energy density, good cycle life, and environmental protection, so they quickly occupy an important position in the portable consumer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00B82Y40/00H01M4/36H01M4/58H01M4/62H01M10/0525Y02E60/10
Inventor 曾宏武英赵海花周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD