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Polycarbonyl compound modified graphene oxide for lithium battery electrode material and preparation method thereof

A compound and polycarbonyl technology, applied in the field of polycarbonyl compound-modified graphene oxide and its preparation, can solve the problems of cumbersome synthesis methods and general performance of lithium-ion battery cathode materials, and achieve high specific capacity, excellent cycle stability, The effect of the simple process of the method

Inactive Publication Date: 2019-01-08
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to those methods mentioned above, constructing carbon-supported organic composite materials is a good way, which can solve the above two main problems at the same time (Advanced Materials, 2014, 26, 2558-2565; Carbon, 2017, 116, 154- 166), but the synthesis methods reported in these documents (Carbon, 2017, 116, 154-166) are relatively cumbersome, and the obtained materials have general performance as cathode materials for lithium-ion batteries

Method used

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  • Polycarbonyl compound modified graphene oxide for lithium battery electrode material and preparation method thereof
  • Polycarbonyl compound modified graphene oxide for lithium battery electrode material and preparation method thereof
  • Polycarbonyl compound modified graphene oxide for lithium battery electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Weigh 24mg of N,N'-diamino-1,4,5,8-naphthalimide (DNTCB) and 60mg of graphene oxide (GO) into a 25mL small beaker, add 20mL of anhydrous N,N' - Dimethylformamide (DMF), sonication for 20 minutes. Then add the suspension into a 250mL three-necked flask, add 40mL of anhydrous DMF, then add 24mg of dicyclohexylcarbodiimide (DCC), then turn on the magnetic stirring, stir until uniformly dispersed, and heat the reaction to 60°C, React for 24 hours. After the reaction was over, the heating was stopped and the oil bath was removed to obtain a dark brown suspension. After the suspension was cooled to room temperature, it was filtered with suction and washed several times with absolute ethanol to obtain a dark brown powder. The powder was placed in a petri dish and dried under vacuum at 50°C to obtain material A / DNTCB-GO. Infrared spectra( figure 1 ), powder X-ray diffraction pattern ( figure 2 ), photoelectron spectrum ( image 3 ), Raman spectrum ( Figure 4 ) indicate...

Embodiment 2

[0041] The experimental method is the same as that in Example 1, except that 24mg N,N'-diamino-1,4,5,8-naphthalimide (DNTCB) is changed to 9.5mg 2,6-diaminoanthraquinone, 24mg bicyclic Hexylcarbodiimide (DCC) was changed to 19.5 mg of dicyclohexylcarbodiimide (DCC), and material B / DAAQ-GO was obtained. Infrared spectra( Figure 12 ), powder X-ray diffraction pattern ( Figure 13 ), photoelectron spectrum ( Figure 14 ) shows that the synthesized product is compound A / DNTCB-GO. thermogravimetric map ( Figure 15 ) shows the thermal stability of the material; SEM image ( Figure 16 ) and TEM image ( Figure 17 ) shows that material B / DAAQ-GO is composed of layered nanosheets. from Figure 18 In the cyclic voltammogram, it can be seen that the shape of the spectrum after the third cycle is similar, indicating that the electrode material has good reversibility. from Figure 19 It can be seen from the charge-discharge diagram of the electrode material that the specific cap...

Embodiment 3

[0043] The experimental method is the same as that in Example 1, except that 60 mL of N,N'-dimethylformamide is changed to 60 mL of dimethyl sulfoxide (DMSO) to obtain material A / DNTCB-GO.

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Abstract

The invention relates to a polycarbonyl compound modified graphene oxide as lithium battery electrode material and a preparation method thereof, belonging to the preparation field of lithium battery electrode material. Polycarbonyl compound, graphene oxide and dicyclohexyl carbodiimide were put into organic solvent, and then reacted at a certain temperature for a period of time, then cooled, filtered and washed to obtain polycarbonyl compound modified graphene oxide. The obtained polycarbonyl compound modified graphene oxide has high specific capacity and excellent cycling stability when usedto prepare lithium battery electrode materials. The method has the advantages of simple process, low cost, low energy consumption, good reproducibility and excellent performance, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of preparation of lithium battery electrode materials, in particular to graphene oxide modified by polycarbonyl compounds and a preparation method thereof. Background technique [0002] The prosperity of the economy, the advancement of science and technology, and the concept of sustainable development all require us to look for environmentally friendly energy to replace the increasingly depleted fossil energy. The desire for clean energy sources such as solar and wind power has spurred the development of energy storage systems, especially rechargeable lithium-ion batteries. Lithium-ion batteries are a cutting-edge technology in the field of batteries due to their long cycle life, high energy density and high efficiency. There are many studies devoted to discovering new materials to improve the performance of Li-ion batteries. Among them, in terms of cathode materials, a lot of work has focused on inorganic electrode...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/587H01M4/60H01M10/0525
CPCH01M4/364H01M4/587H01M4/60H01M10/0525Y02E60/10
Inventor 刘琦温豪宋怡丹孙光池沙彦勇戎红仁
Owner CHANGZHOU UNIV
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