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Protonation modified g-C3N4 (graphitic carbon nitride) material, preparation thereof and application of protonation modified g-C3N4 material to anode material of lithium ion battery

A technology for lithium ion batteries and negative electrode materials, applied in battery electrodes, nitrogen compounds, chemical instruments and methods, etc., can solve problems such as battery short circuit, damage to electrode structure, and easy peeling of graphite sheets, and achieve good structural stability and high heat. Stable, long-cycle and high-safety effects

Active Publication Date: 2018-03-23
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphite materials have a fatal disadvantage. After repeated lithium ion deintercalation, the graphite sheets are easy to peel off, destroying the structure of the electrode; at the same time, the large interlayer spacing also causes the intercalated lithium ions to gather to form lithium dendrites, resulting in a short circuit in the battery.

Method used

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  • Protonation modified g-C3N4 (graphitic carbon nitride) material, preparation thereof and application of protonation modified g-C3N4 material to anode material of lithium ion battery
  • Protonation modified g-C3N4 (graphitic carbon nitride) material, preparation thereof and application of protonation modified g-C3N4 material to anode material of lithium ion battery
  • Protonation modified g-C3N4 (graphitic carbon nitride) material, preparation thereof and application of protonation modified g-C3N4 material to anode material of lithium ion battery

Examples

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Embodiment 1

[0042] Weigh 5g of dicyandiamide, under a nitrogen atmosphere, at a heating rate of 10°C / min, keep at 500°C for 4h, and grind the product sufficiently.

Embodiment 2

[0044] Weigh 5g of dicyandiamide, under a nitrogen atmosphere, at a heating rate of 10°C / min, keep at 550°C for 4h, and grind the product sufficiently.

Embodiment 3

[0046] Weigh 5 g of dicyandiamide, under a nitrogen atmosphere, at a heating rate of 10° C. / min, keep at 600° C. for 4 hours, and grind the product sufficiently.

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Abstract

The invention discloses a protonation modified g-C3N4 (graphitic carbon nitride) material, preparation thereof and an application of the protonation modified g-C3N4 material to an anode material of alithium ion battery. G-C3N4 is dispersed in an aqueous solution containing H<+> for a hydrothermal reaction, and the protonation modified g-C3N4 material is obtained. Compared with graphite, g-C3N4 and the protonation modified g-C3N4 material are good in stability and high in electrochemical activity, and when used as the anode material of the lithium ion battery, the protonation modified g-C3N4 material has quite high charge-discharge efficiency, good cycle stability and high charge-discharge capacity.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode material, in particular to a protonated modified g-C 3 N 4 The material, its preparation method and its application in lithium-ion battery negative electrode materials belong to the technical field of lithium-ion batteries. Background technique [0002] With the continuous consumption of fossil energy by human beings, the energy crisis and environmental pollution problems are becoming more and more serious. On the one hand, the generation of chemical energy can reduce environmental pollution and alleviate the problem of energy shortage, and on the other hand, it also provides great convenience for our life. Lithium-ion batteries have the advantages of long cycle life, high energy density, and no memory effect, and are widely used in electronic products such as notebook computers, mobile phones, and electric vehicles. Commercially, graphite-based materials are generally used as the neg...

Claims

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Application Information

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IPC IPC(8): C01B21/082H01M4/58
CPCC01B21/0605C01P2002/72C01P2002/88C01P2004/03C01P2006/40H01M4/58Y02E60/10
Inventor 李亚娟张梦源王一茗张枝枫游小龙刘又年
Owner CENT SOUTH UNIV
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