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Molybdenum disulfide/carbon composite material and preparation method thereof

A carbon composite material and molybdenum disulfide technology, applied in the field of energy storage materials, can solve the problems of complex preparation process, poor electrical conductivity of molybdenum disulfide and high synthesis cost, and achieve the effect of simple process and environmental friendliness

Inactive Publication Date: 2015-09-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, for the above-mentioned molybdenum disulfide lithium battery negative electrode materials, on the one hand, although the individual molybdenum disulfide materials can achieve different morphology control, the electrical conductivity of molybdenum disulfide itself is poor, which restricts its application in battery materials. ; On the other hand, most of the molybdenum disulfide-carbon composites are based on two-dimensional graphene or one-dimensional carbon nanotubes (K.Bindumadhavan, et.al., Chem.Commun, 2013,49,1823; K.Chang , et.al., Chem.Commun., 2011,47,4252.), and the synthesis cost of these substrates is relatively high, and the preparation process is complicated, which is not conducive to large-scale production

Method used

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  • Molybdenum disulfide/carbon composite material and preparation method thereof
  • Molybdenum disulfide/carbon composite material and preparation method thereof
  • Molybdenum disulfide/carbon composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] (1) Preparation of negative electrode material (molybdenum disulfide / carbon composite material):

[0031] Step 1, at room temperature, add 1g of silica nanospheres (particle size about 200nm) to 50ml of anhydrous methanol, after ultrasonic treatment, then add 8ml of triaminopropyltriethoxysilane, and magnetically stir for 2 hours to form Suspension: centrifuging the suspension to obtain a first reaction product, washing the first reaction product with ethanol, and then drying the first reaction product, the dried first reaction product That is, amino-modified silica particles.

[0032]Step 2, add the amino-modified silicon dioxide particles (0.7g) and glucose (3g) obtained in the step 1 into 70ml of aqueous solution, stir vigorously for 2 hours and then pour them into a 100ml first reaction kettle, and then put the The first reaction kettle was heated from room temperature to 180°C, and kept at 180°C for 4 hours, and then the product in the first reaction kettle was ce...

Embodiment 2

[0045] Preparation of negative electrode material (molybdenum disulfide / carbon composite material):

[0046] Step 1, at room temperature, add 0.5g of silica nanospheres (particle size about 250nm) to 3ml of anhydrous methanol, after ultrasonic treatment, then add 473ul of triaminopropyltriethoxysilane, and stir magnetically for 0.5 hours forming a suspension; centrifuging the suspension to obtain a first reaction product, washing the first reaction product with ethanol, and then drying the first reaction product, and the first reaction product after drying The product is amino-modified silica particles.

[0047] Step 2, add the amino-modified silica particles (0.5g) and glucose (2g) obtained in the step 1 into 30ml of aqueous solution, stir vigorously for 0.5 hours and then pour them into a 50ml first reaction kettle, and then put the The first reaction kettle was heated from room temperature to 200°C, and kept at 200°C for 5 hours, and then the product in the first reaction ...

Embodiment 3

[0052] Preparation of negative electrode material (molybdenum disulfide / carbon composite material):

[0053] Step 1, at room temperature, add 2g of silica nanospheres (particle size about 50nm) to 70ml of anhydrous methanol, after sonication, then add 1.8ml of triaminopropyltriethoxysilane, and stir magnetically for 0.5 hours forming a suspension; centrifuging the suspension to obtain a first reaction product, washing the first reaction product with ethanol, and then drying the first reaction product, and the first reaction product after drying The product is amino-modified silica particles.

[0054] Step 2, add the amino-modified silica particles (1g) and glucose (10g) obtained in the step 1 into 80ml of aqueous solution, stir vigorously for 2 hours and pour them into a 100ml first reaction kettle, and then put the second A reaction kettle was heated from room temperature to 160°C, and kept at 160°C for 8 hours, and then the product in the first reaction kettle was centrifug...

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Abstract

The invention discloses a molybdenum disulfide / carbon composite material. The molybdenum disulfide / carbon composite material comprises a molybdenum disulfide layer and a carbon hollow ball, wherein the molybdenum disulfide layer is positioned outside the carbon hollow ball; and the carbon hollow ball has a hollow structure. The invention also discloses a preparation method of the molybdenum disulfide / carbon composite material. The preparation method comprises the following steps of using amino modified silica spheres as a template; wrapping the template by pyrolyzation of an organic carbon source; performing thermal reaction on the template and ammonium tetrathiomolybdate through solvent; performing high-temperature carbonization in an inert atmosphere; and removing the silicon oxide template to obtain the molybdenum disulfide / carbon composite material. The lithium-intercalation capacity of the molybdenum disulfide / carbon composite material is 1467mAh / g for the first time, and the specific capacity of the molybdenum disulfide / carbon composite material can be kept at 733mAh / g after 30 times of repeated charging and discharging cycles.

Description

technical field [0001] The invention relates to a molybdenum disulfide / carbon composite material for lithium ion batteries, a preparation method and application thereof, and belongs to the technical field of energy storage materials. Background technique [0002] Molybdenum disulfide is a transition metal sulfide with a layered structure. It has a typical three-layer structure, that is, a metal molybdenum layer is sandwiched between two sulfur layers to form a sandwich-like sandwich structure. Each metal Atoms form bonds with six sulfur elements, forming a prism coordination model. The layers of this two-dimensional layered compound are connected by weak van der Waals force, and the S-Mo-S atoms between the layers are connected by strong covalent bonds. Therefore, the inner force is stronger, and the layer relatively weak. This substance is currently used in solid lubricants, catalysis, supercapacitors, lithium-ion battery materials and other fields. Among them, lithium-io...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62
CPCH01M4/5815H01M4/62H01M10/0525Y02E60/10
Inventor 高濂孙壮宋雪峰张鹏姚钰宸
Owner SHANGHAI JIAO TONG UNIV
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