Three-dimensional graphene composite electrode with surface carrying flowerlike Ni3S2 and preparation method and application thereof

A composite technology of nickel disulfide and graphene, applied in the direction of negative electrode, battery electrode, secondary battery, etc., to achieve the effect of improving cycle stability, short cycle and simple process

Active Publication Date: 2016-07-20
SHANGHAI HANHANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of graphene as a matrix can satisfy both electrical conductivity and immobilization, and has good prospects in the electrode design of sodium-ion batteries, but there is no literature report in this regard

Method used

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  • Three-dimensional graphene composite electrode with surface carrying flowerlike Ni3S2 and preparation method and application thereof
  • Three-dimensional graphene composite electrode with surface carrying flowerlike Ni3S2 and preparation method and application thereof
  • Three-dimensional graphene composite electrode with surface carrying flowerlike Ni3S2 and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Put nickel foam into a tube furnace, and raise the temperature to 1000°C at a heating rate of 100°C / min under an Ar (500s.c.c.m.) atmosphere; after holding for 5 minutes, introduce methane into the quartz tube with an Ar (250s.c.c.m.) flow , reacted for 5 minutes; finally, cooled to room temperature at a cooling rate of 100°C / min under an Ar atmosphere to obtain three-dimensional graphene (Ni / G) grown on a nickel foam substrate, wherein the loading capacity of graphene was 0.485mg / cm 2 ; Thiourea (the molar weight is 0.4 times of anhydrous sodium sulfate) and anhydrous sodium sulfate are dissolved in deionized water, stir well, and prepare SO 4 2–A solution with a concentration of 0.03mol / L; Ni / G is used as a matrix, immersed in the above solution, and then transferred into a reaction kettle, sealed and kept in an oven at 120°C for 3 hours, and then rinsed with deionized water and absolute alcohol Several times, after vacuum drying in an oven at 60 °C for 12 hours, the...

Embodiment 2

[0046] Put nickel foam into a tube furnace, and raise the temperature to 1000°C at a heating rate of 100°C / min under an Ar (500s.c.c.m.) atmosphere; after holding for 5 minutes, introduce methane into the quartz tube with an Ar (250s.c.c.m.) flow , reacted for 8 minutes; finally, cooled to room temperature at a cooling rate of 100°C / min under an Ar atmosphere to obtain three-dimensional graphene (Ni / G) grown on a nickel foam substrate, wherein the graphene loading capacity was 0.51mg / cm 2 ; Thiourea (0.2 of the molar mass of anhydrous sodium sulfate) and anhydrous sodium sulfate are dissolved in deionized water, stirred evenly, and prepared with SO 4 2– A solution with a concentration of 0.05mol / L; use Ni / G as a matrix, immerse in the above solution, then transfer it into a reaction kettle, seal it and keep it in an oven at 110°C for 4 hours, and then rinse it with deionized water and absolute alcohol Several times, after vacuum drying in an oven at 60 °C for 12 hours, the su...

Embodiment 3

[0050] Put nickel foam into a tube furnace, and raise the temperature to 1000°C at a rate of 100°C / min under an Ar (500s.c.c.m.) atmosphere; after holding for 5 minutes, introduce ethanol into the quartz tube with an Ar (250s.c.c.m.) airflow , reacted for 3 minutes; finally, cooled to room temperature at a cooling rate of 100°C / min under Ar atmosphere to obtain three-dimensional graphene (Ni / G) grown on a nickel foam substrate, wherein the graphene loading capacity was 0.32mg / cm 2 ; Thiourea (0.6 of the molar mass of anhydrous sodium sulfate) and anhydrous sodium sulfate are dissolved in deionized water, stirred evenly, and prepared with SO 4 2– A solution with a metered concentration of 0.02mol / L; Ni / G is used as a matrix, immersed in the above solution, then transferred into a reaction kettle, sealed and kept in an oven at 130°C for 2 hours, and then rinsed with deionized water and absolute alcohol Several times, after vacuum drying in an oven at 60 °C for 12 hours, the sur...

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Abstract

The invention discloses a three-dimensional graphene composite electrode with three-dimensional porous foamed nickel as a base body. Graphene directly grows on the base body, and flowerlike Ni3S2 directly grows on the graphene. The invention further discloses a preparation method and application of the three-dimensional graphene composite electrode. The preparation method has the advantages of being simple in process, low in cost, short in period, low in energy consumption and the like and is suitable for large-scale industrial production. The prepared three-dimensional graphene composite electrode does not contain any conductive agent and adhesive. Due to the special three-dimensional porous structure and the conductive and fixing function of the flowerlike Ni3S2 and graphene, when used for a sodium-ion battery, the composite electrode shows high capacity and good circulation stability.

Description

technical field [0001] The invention relates to the field of composite electrodes for sodium ion batteries, in particular to a three-dimensional graphene composite electrode and its preparation method and application. Background technique [0002] Lithium-ion batteries are now widely used in mobile electronic devices, such as smartphones, laptops, etc., and have huge markets in grid energy storage, electric vehicles. However, with the popularization of lithium-ion batteries, especially large-scale use in electric vehicles, the consumption of lithium resources is also huge. However, the reserves of lithium resources are limited, and there is currently no effective and economical technology for the recovery of lithium elements in waste lithium-ion batteries. In contrast, the reserves of sodium on the earth are much higher than that of lithium, and the price is much lower than that of lithium. Therefore, in recent years, sodium-ion batteries have attracted much attention. It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M4/136H01M4/1397H01M10/054
CPCH01M4/136H01M4/1397H01M4/362H01M4/5815H01M4/625H01M10/054H01M2004/027Y02E60/10
Inventor 谢健夏雪珂曹高劭赵新兵
Owner SHANGHAI HANHANG TECH CO LTD
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