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

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 ...

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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 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] Carbon-supported porous spherical MoN composed of nanosheets has not yet been reported on patents

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