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Sulfonated graphene metal salt and its preparation method and application

A technology of sulfonated graphene and metal salt, which is applied in the field of sulfonated graphene metal salt and its preparation, can solve the problems of poor graphene dispersion, poor cycle stability, aggregation of metal nanoparticles, etc., and achieve good dispersion , mild reaction conditions and simple preparation process

Active Publication Date: 2017-11-17
SUZHOU GRAPHENE NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The industry tries to combine metals or their oxides, such as metal nanoparticles and graphene materials, in order to obtain composite materials with higher reversible capacity and better cycle stability, but such composite materials are not stable during charge and discharge. It is easy to coalesce, resulting in poor cycle stability. In addition, graphene still has defects such as poor dispersion

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  • Sulfonated graphene metal salt and its preparation method and application

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 A sulfonated graphene metal salt related to this example includes sulfonated graphene and a metal compound bound to the surface of the sulfonated graphene through ionic bonding.

[0034] A kind of method preparing this sulfonated graphene metal salt comprises the steps:

[0035] S1, uniformly dispersing the sulfonated graphene in DMSO to form a sulfonated graphene solution with a concentration of 0.1500g / L;

[0036] S2. Add lithium oxide or lithium hydroxide to the sulfonated graphene solution in an inert atmosphere, so that the amount of lithium oxide added to the sulfonated graphene solution is 0.3 g / L, and stir and react at room temperature for 6 h, Obtain sulfonated graphene lithium salt solution;

[0037] S3. Drying the sulfonated graphene metal solution at 85° C. to 100° C. to obtain the sulfonated graphene metal salt.

Embodiment 2

[0038] Example 2 A sulfonated graphene metal salt involved in this example includes sulfonated graphene and a metal compound ionically bound to the surface of the sulfonated graphene.

[0039] A kind of method preparing this sulfonated graphene metal salt comprises the steps:

[0040] S1, will be uniformly dispersed in DMF with reference to the prepared sulfonated graphene of CN103539105A method, form the sulfonated graphene solution that concentration is 500g / L;

[0041] S2. Add lithium hydroxide to the sulfonated graphene solution in an inert atmosphere, so that the amount of lithium hydroxide added to the sulfonated graphene solution is 30g / L, and stir and react at room temperature for 1h to obtain sulfonated graphene Graphene lithium salt solution;

[0042] S3. Drying the sulfonated graphene metal solution at 100° C. to 120° C. to obtain the sulfonated graphene metal salt.

Embodiment 3

[0043] Example 3 A sulfonated graphene metal salt involved in this example includes sulfonated graphene and a metal compound ionically bound to the surface of the sulfonated graphene.

[0044] A kind of method preparing this sulfonated graphene metal salt comprises the steps:

[0045] S1, uniformly dispersing the sulfonated graphene in DMAC to form a sulfonated graphene solution with a concentration of 100g / L;

[0046] S2. Add lithium oxide to the sulfonated graphene solution in an inert atmosphere, so that the amount of lithium oxide added to the sulfonated graphene solution is 10 g / L, and stir and react at room temperature for 4 hours to obtain sulfonated graphene Lithium salt solution;

[0047] S3. Drying the sulfonated graphene metal solution at 180° C. to 200° C. to obtain the sulfonated graphene metal salt.

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Abstract

The invention discloses sulfonated graphene metal salt and a preparation method and application thereof. The sulfonated graphene metal salt is mainly prepared from sulfonated graphene through a reaction of sulfonyl of the sulfonated graphene and a metal compound; the radial dimension of the sulfonated graphene is between 0.05 micrometer and 100 micrometers, the thickness is between 0.5 nanometer and 20 nanometers, the carbon-sulfur molar ratio of the sulfonyl content is between 3 to 1 and 12 to 1, and the molar ratio of sulfonate radicals in the sulfonated graphene to metal elements in the metal compound is between 1 to 1 and 5 to 1. The sulfonated graphene metal salt can be used as an electrode material in an energy storing device, the capacity of the sulfonated graphene metal salt can be between 173 mAh / g and 282 mAh / g, and therefore the sulfonated graphene metal salt has a wide application prospect in manufacture of electrochemical and / or physical energy storing devices; moreover, the preparation process is simple and easy to implement and control, reaction conditions are mild, raw material sources are wide, and large-scale production is facilitated.

Description

technical field [0001] The invention relates to a graphene material, in particular to a sulfonated graphene metal salt and its preparation method and application, such as application as an electrode material. Background technique [0002] Graphene is a two-dimensional carbon crystal that is built like individual graphite layers. Carbon atoms are arranged in a hexagonal honeycomb structure. This arrangement results from the hybridization ("fusion") of the 2s, 2px and 2py orbitals of the associated carbon atoms into so-called sp2 hybridized orbitals. Graphene has both metallic and non-metallic properties. The metallic properties of graphene involve good electrical and thermal conductivity, and the non-metallic properties lead to high thermal stability, chemical inertness and lubricating properties of these compounds. Graphene is therefore suitable for many industrial applications, such as batteries, fuel cells or refractory materials. [0003] However, when graphene is dir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B13/14
CPCC01B13/14C01P2004/80
Inventor 蒋永华郝建东栗建民魏艳丽张维朱尚仪
Owner SUZHOU GRAPHENE NEW MATERIAL TECH
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