Carbon-supported porous spherical MoN formed by nanosheets, and application of porous spherical MoN as negative material in lithium batteries

A technology of porous spherical and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., to achieve the effects of good reproducibility, good cycle stability, and good high-rate performance

Active Publication Date: 2018-11-09
FUZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] So far, lithium-ion batteries have been widely used. However, the traditional commercial negative electrode material graphite has a theoretical capacity of only 372 mAh/g, which cannot meet the needs of modern electronic devices. Therefore, an alternative h

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  • Carbon-supported porous spherical MoN formed by nanosheets, and application of porous spherical MoN as negative material in lithium batteries
  • Carbon-supported porous spherical MoN formed by nanosheets, and application of porous spherical MoN as negative material in lithium batteries
  • Carbon-supported porous spherical MoN formed by nanosheets, and application of porous spherical MoN as negative material in lithium batteries

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[0015] Example 1

[0016] A porous spherical MoN supported by carbon composed of nanosheets. The preparation method includes the following steps: 0.1g MoO 2 (acac) 2 , 0.2g CH 4 N 2 S and 0.1g glucose into 20ml H 2 After stirring for 1 hour, put it in an oven at 200 ℃ for 12 hours and then take it out. After cooling to room temperature, the product was centrifuged, washed with ethanol and deionized water several times, and dried in an oven at 70 ℃ to obtain MoN. The precursor was then put into a tube furnace and calcined at 800°C for 4 hours in an ammonia atmosphere to obtain a carbon-supported porous spherical MoN material composed of nanosheets.

[0017] The application of the MoN as a negative electrode material in a lithium ion battery, the preparation method of the lithium battery: according to the mass ratio of MoN nanosheets: acetylene black: polyvinylidene fluoride = 8:1:1, uniformly mixed and coated on copper foil As a negative electrode, the reference electrode and counte...

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Abstract

The invention relates to a carbon-supported porous spherical MoN lithium battery negative material formed by nanosheets. A preparation method of the material comprises the following steps: adding 0.1gof MoO2(acac)2, 0.2g of CH4N2S and 0.1g of glucose into 20ml of H2O and stirring for 1h, then placing in an oven at 200 DEG C for 12h, then taking out, centrifuging the product when the product is cooled to the room temperature, washing with ethanol and deionized water for a plurality of times, and placing in the oven at 70 DEG C to obtain a precursor of MoN; then, placing the obtained precursorin a tube furnace, and calcining for 4h at 800 DEG C in an ammonia atmosphere to obtain the carbon-supported porous spherical MoN material formed by the nanosheets. The prepared spherical MoN nanosheets having sizes of 500nm have good cycle stability and high rate performance as negative electrodes of lithium ion batteries, and has a specific capacity of 600mAh/g after 400 cycles of charge and discharge when the current density is 1A.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a carbon-supported porous spherical MoN composed of nanosheets and its application in lithium batteries as negative electrode materials. Background technique [0002] So far, lithium-ion batteries have been widely used. However, the traditional commercial negative electrode material graphite has a theoretical capacity of only 372 mAh / g, which cannot meet the needs of modern electronic devices. Therefore, an alternative high-capacity negative electrode material was invented. It has been called the primary task of scientific research workers and the urgent need of modern society. [0003] There is no related patent report on carbon-supported porous spherical MoN composed of nanosheets. Contents of the invention [0004] The object of the present invention is to provide a carbon-supported porous spherical MoN composed of nano-sheets and its application in lithium ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/362H01M4/58H01M4/62H01M4/625H01M10/0525Y02E60/10
Inventor 魏明灯王建标沈德立
Owner FUZHOU UNIVERSITY
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