Anthraquinone dihydroxy sodium salt-graphene compound and preparation and application thereof

A technology of anthraquinone dihydroxy sodium salt and hydroxyanthraquinone disodium, which is applied in the field of sodium ion battery materials, can solve the problems of not improving the electrochemical performance of the cathode material of sodium batteries, and achieve good cycle stability, rate performance, and yield The effect of high and high discharge capacity

Inactive Publication Date: 2018-01-12
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the current literature reports, there is no use of graphene to compound anthraquinone dihydroxy sodium salt to improve its electrochemical performance as a cathode material for sodium batteries.

Method used

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  • Anthraquinone dihydroxy sodium salt-graphene compound and preparation and application thereof
  • Anthraquinone dihydroxy sodium salt-graphene compound and preparation and application thereof
  • Anthraquinone dihydroxy sodium salt-graphene compound and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Dissolve 1.04g of 1,5-dihydroxyanthraquinone (DHAQ) in 10mL of N,N-dimethylformamide and stir at 80°C, then gradually add 20mL of 1mol / L NaOH solution dropwise. Continue to reflux and stir for 8 hours and stop heating, remove the mother liquor with a rotary evaporator to obtain a purple-black precipitate, wash the obtained precipitate with deionized water, and then dry it in a vacuum oven at 80°C for 12 hours to obtain 1,5-dihydroxyanthraquinone disodium ( DHAQNa).

[0037] (2) Take 0.1g DHAQNa prepared in step (1) and grind it in a quartz grinding pot for half an hour and disperse it together with 0.05g graphene into 15mL of N-methylpyrrolidone solvent, put it into a quartz ball mill jar and mill it for 3 hours to make Cloudy liquid.

[0038] (3) The turbid liquid obtained in step (2) was transferred to a vacuum drying oven, and the co-precipitation was vacuum-dried at 80° C. for 24 hours to obtain disodium hydroxyanthraquinone-graphene complex (DHAQNa / G).

[003...

Embodiment 2

[0046] (1) Dissolve 1.04 g of 1,5-dihydroxyanthraquinone (DHAQ) in 10 mL of dichloromethane and stir at 80° C., then gradually add 10 mL of 1 mol / L NaOH solution dropwise. Continue to reflux and stir for 8 hours and stop heating, remove the mother liquor with a rotary evaporator to obtain a purple-black precipitate, wash the obtained precipitate with deionized water, and then dry it in a vacuum oven at 60°C for 12 hours to obtain 1,5-dihydroxyanthraquinone disodium ( DHAQNa).

[0047] (2) Take 0.05g DHAQNa prepared in step (1) and grind it in a quartz grinding pot for half an hour and disperse it together with 0.05g graphene into 10mL of N-methylpyrrolidone solvent, put it into a quartz ball mill jar and mill it for 2 hours to make Cloudy liquid.

[0048] (3) The turbid liquid obtained in step (2) was transferred to a vacuum drying oven, and the co-precipitation was vacuum-dried at 60° C. for 24 hours to obtain disodium hydroxyanthraquinone-graphene complex (DHAQNa / G).

[00...

Embodiment 3

[0055] (1) Dissolve 1.04 g of 1,5-dihydroxyanthraquinone (DHAQ) in 10 mL of methanol and stir at 80° C., then gradually add 30 mL of 1 mol / L NaOH solution dropwise. Continue to reflux and stir for 12 hours and stop heating, remove the mother liquor with a rotary evaporator to obtain a purple-black precipitate, wash the obtained precipitate with deionized water, and then dry it in a vacuum oven at 90°C for 24 hours to obtain 1,5-dihydroxyanthraquinone disodium ( DHAQNa).

[0056] (2) Take 0.15g DHAQNa prepared in step (1) and grind it in a quartz grinding pot for half an hour and disperse it together with 0.05g graphene into 10mL of N-methylpyrrolidone solvent, put it into a quartz ball mill jar and mill it for 5 hours to make Cloudy liquid.

[0057] (3) The turbid liquid obtained in step (2) was transferred to a vacuum drying oven, and the co-precipitation was vacuum-dried at 85° C. for 24 hours to obtain disodium hydroxyanthraquinone-graphene complex (DHAQNa / G).

[0058] Th...

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Abstract

The invention belongs to the technical field of sodium-ion battery materials and discloses an anthraquinone dihydroxy sodium salt-graphene compound and preparation and application thereof. The preparation method comprises the following steps: adding 1,5-dioxyanthraquinone into a solvent, performing uniform agitation and dissolution, then dripping a NaOH solution, enabling a reflux agitation reaction to obtain 1,5-dioxyanthraquinone disodium, grinding 1,5-dioxyanthraquinone disodium, dispersing ground 1,5-dioxyanthraquinone disodium and graphene into the solvent, placing the mixture into a ballmilling tank, and performing ball milling to obtain a turbid liquid; and performing ultrasonic treatment on the turbid liquid, and performing vacuum drying and precipitation to obtain a 1,5-dioxyanthraquinone disodium-graphene compound. The preparation method is simple and feasible, low in cost and high in yield, saves energy and protects the environment; and the obtained compound has high discharge capacity and favorable cyclic stability and rate capability than simple 1,5-dioxyanthraquinone disodium, and can be applied to a lithium-ion battery cathode material.

Description

technical field [0001] The invention belongs to the technical field of sodium ion battery materials, and in particular relates to an anthraquinone dihydroxy sodium salt-graphene compound and its preparation and application. Background technique [0002] In recent years, with the development and application of electric vehicles and smart grids, commercial lithium-ion batteries have also highlighted their limitations. However, there are abundant sodium resources in nature, and the extraction is relatively easy, which has attracted much attention in the research of room temperature sodium-ion batteries. Cathode materials are an important component of sodium-ion batteries. The energy density of the battery mainly depends on the energy density of the cathode material. In recent years, researchers have invested a lot of work in the study of sodium ion cathode materials. Among them, inorganic compound electrode materials based on transition metals, such as metal oxides, polyanion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/62H01M10/054
CPCY02E60/10
Inventor 曾荣华陈小菊巫艺文罗一帆
Owner SOUTH CHINA NORMAL UNIVERSITY
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