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Molybdenum oxide/nitrogen-doped carbon composite electrode material and preparation method thereof

A technology of nitrogen-doped carbon and molybdenum oxide, which is applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve the problems of poor conductivity, cyclability and rate, and achieve good cycle performance and Rate performance, low raw material cost, and enhanced diffusion ability

Inactive Publication Date: 2015-06-24
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a molybdenum oxide / nitrogen-doped carbon composite electrode material, which solves the problems of poor conductivity, cycleability and rate performance of the electrode material in the prior art

Method used

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  • Molybdenum oxide/nitrogen-doped carbon composite electrode material and preparation method thereof
  • Molybdenum oxide/nitrogen-doped carbon composite electrode material and preparation method thereof
  • Molybdenum oxide/nitrogen-doped carbon composite electrode material and preparation method thereof

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Embodiment 1

[0025] 1) Measure 2 mL of n-octylamine (analytical pure) and dissolve it in 60 mL of butanol solvent. After the n-octylamine is fully dissolved, weigh 0.37 g of molybdenum trioxide (analytical pure) and add it to the above mixed solution. The reaction was stirred in medium temperature for 48 h, and a white precipitate was formed. The filter cake was filtered by suction and washed with butanol solvent, and dried under reduced pressure at 80 °C for 48 h to obtain a molybdenum trioxide organic / inorganic hybrid compound intercalated with n-octylamine;

[0026] 2) The molybdenum trioxide organic / inorganic hybrid compound intercalated with n-octylamine was placed in a tubular heating furnace, heated to 400 °C at a heating rate of 1 °C / min in a nitrogen atmosphere, and then slowly cooled to At room temperature, a molybdenum oxide / nitrogen-doped carbon composite was obtained.

[0027] Such as figure 1 As shown, SEM observed that the synthesized molybdenum oxide / nitrogen-doped carbon ...

Embodiment 2

[0029] 1) Measure 5 mL of n-heptylamine (analytical pure) and dissolve it in 100 mL of propanol solvent. After the n-heptylamine is fully dissolved, weigh 0.50 g of molybdenum trioxide (analytical pure) and add it to the above mixed solution. The reaction was stirred in medium temperature for 36 h, and a white precipitate was formed. The filter cake was filtered by suction and washed with propanol solvent, and dried under reduced pressure at 70 °C for 12 h to obtain a molybdenum trioxide organic / inorganic hybrid compound intercalated with n-heptylamine;

[0030] 2) The molybdenum trioxide organic / inorganic hybrid compound intercalated with n-heptylamine was placed in a tubular heating furnace, heated to 550 °C at a heating rate of 3 °C / min in a helium atmosphere, kept for 4 h and then cooled slowly to room temperature to obtain a molybdenum oxide / nitrogen-doped carbon composite material.

[0031] Such as figure 2 As shown, SEM observed that the synthesized molybdenum oxide / n...

Embodiment 3

[0033] 1) Measure 15 mL of n-hexylamine (analytical pure) and dissolve it in 150 mL of propanol solvent. After n-hexylamine is fully dissolved, weigh 1.1 g of molybdenum trioxide (analytical pure) and add it to the above mixed solution, and stir in a water bath at 80 °C After reacting for 18 h, a white precipitate was formed, which was filtered by suction and washed with propanol solvent, and dried under reduced pressure at 70 °C for 12 h to obtain a molybdenum trioxide organic / inorganic hybrid compound intercalated with n-hexylamine;

[0034] 2) The molybdenum trioxide organic / inorganic hybrid compound intercalated with n-hexylamine was placed in a tubular heating furnace, heated to 620 °C at a heating rate of 7 °C / min in an argon atmosphere, and then slowly cooled to At room temperature, a molybdenum oxide / nitrogen-doped carbon composite was obtained.

[0035] Such as image 3 As shown, TEM and SAED show that the obtained composite material is an amorphous structure.

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Abstract

The invention relates to a molybdenum oxide / nitrogen-doped carbon composite electrode material and a preparation method thereof, and belongs to the technical field of preparation of lithium ion battery electrode materials. The molybdenum oxide / nitrogen-doped carbon composite electrode material of a lithium ion battery is prepared from pyrolytic organic amine and an intercalation compound of molybdenum trioxide. The molybdenum oxide / nitrogen-doped carbon composite electrode material has the advantages that homogeneous in-situ composition of nitrogen-doped carbon and molybdenum oxide is realized; the electrical conductivity of the electrode material is improved, and the embedding / stripping capacity of lithium ions is enhanced, so that high specific capacity and good cycle performance are obtained. The molybdenum oxide / nitrogen-doped carbon composite electrode material prepared by the method is a lithium ion battery negative material with excellent performance; the synthesis method is simple in process and low in preparation cost; and large-scale industrial production is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of preparation of lithium-ion battery electrode materials, and particularly provides a molybdenum oxide / nitrogen-doped carbon composite electrode material and a preparation method thereof. Molybdenum oxide / nitrogen-doped carbon is prepared by pyrolysis of a layered precursor composite material. Background technique [0002] Graphite is the most widely used anode material for lithium-ion batteries commercially, and its actual specific capacity has reached 360 mAhg -1 , very close to the theoretical capacity of 372 mAhg -1 . In order to meet the market demand for high-capacity lithium batteries, it is particularly important to develop new anode materials that can replace graphite. Molybdenum oxide (MoO 3 and MoO 2 ) is considered to be a promising anode material for lithium-ion batteries, not only with low price and good safety performance, but also with high theoretical capacity. However, like other m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/587B82Y30/00
CPCY02E60/10
Inventor 杨占旭邱继一承
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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