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Preparation of nickel disselenium-graphene composite material and application for sodium electricity

A composite material, nickel diselenide technology, applied in graphene, selenium/tellurium compounds, nanotechnology for materials and surface science, etc., can solve problems such as poor battery rate performance, active material shedding, poor conductivity, etc. , achieving good cycle stability and rate performance, simple production control, and improved dispersion and stability

Inactive Publication Date: 2020-01-14
BENGBU COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented new type of composition made from selenium (Se) has been developed that improves upon existing compositions by combining two materials together at once or more without relying on harmful chemicals like sulfur dioxide. It also allows for easy manufacturing while maintaining its effectiveness over time due to less expensive raw components used compared to traditional methods such as reducing metal salt concentration through adjustment techniques. Overall this innovation makes it possible to create high quality batteries quickly and efficiently.

Problems solved by technology

This patented technical solution describes how lithiated carbon (LiC) was discovered by studying its chemical composition and crystal structures before being put into use on electronic devices like computers or smartphones due to its superiority over other types of cathode materials when compared against LiCoO2. Additionally, this new type of anodes called Ni(OH), showed better charge/discharge efficiency without losing any part of them even if they were made smaller. These results led scientists to develop more efficient secondary cell technology based upon these improved materials.

Method used

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  • Preparation of nickel disselenium-graphene composite material and application for sodium electricity
  • Preparation of nickel disselenium-graphene composite material and application for sodium electricity

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of the nickel diselenide-graphene composite material of this embodiment specifically includes the following steps:

[0025] (1): Add graphene oxide to 30mL of deionized water, prepare a graphene oxide solution with a concentration of 10mg / mL, add hydrazine hydrate, stir until the dispersion is uniform, add 2mmol selenium dioxide, 1mmol nickel nitrate and perform ultrasonic dispersion again ;

[0026] (2): Put the mixture obtained in step (1) into a hydrothermal synthesis kettle and keep it at 160°C for 10 hours;

[0027] (3): After the reaction is cooled, the product in the hydrothermal synthesis kettle is separated by suction filtration, washed with deionized water, and freeze-dried to obtain the nickel diselenide supported graphene composite material.

[0028] Using the nickel diselenide-graphene composite material prepared in Example 1 as the negative electrode material of a sodium ion battery: take the nickel diselenide-graphene composite material with a mas...

Embodiment 2

[0032] The preparation of the nickel diselenide-graphene composite material of this embodiment specifically includes the following steps:

[0033] (1): Add graphene oxide to 30mL of deionized water, prepare a graphene oxide solution with a concentration of 5mg / mL, add hydrazine, stir until the dispersion is uniform, add 2mmol selenium dioxide, 1mmol nickel chloride and perform ultrasonic dispersion again ;

[0034] (2): Put the mixture obtained in step (1) into a hydrothermal synthesis kettle and keep it at 140°C for 15 hours;

[0035] (3): After the reaction is cooled, the product in the hydrothermal synthesis kettle is separated by suction filtration, washed with deionized water, and freeze-dried to obtain the nickel selenide-supported graphene composite material.

[0036] The nickel diselenide-graphene composite material prepared in Example 2 was used as the negative electrode material of the sodium ion battery: the nickel diselenide-graphene composite material with a mass ratio of...

Embodiment 3

[0038] The preparation of the nickel diselenide-graphene composite material of this embodiment specifically includes the following steps:

[0039] (1): Add graphene oxide to 30mL of deionized water, prepare a graphene oxide solution with a concentration of 20mg / mL, add dimethylhydrazine, stir until the dispersion is uniform, add 2mmol selenium dioxide, 1mmol nickel sulfate and perform ultrasound again dispersion;

[0040] (2): Put the mixture obtained in step (1) into a hydrothermal synthesis kettle and keep it at 180°C for 5 hours;

[0041] (3): After the reaction is cooled, the product in the hydrothermal synthesis kettle is separated by suction filtration, washed with deionized water, and freeze-dried to obtain the nickel diselenide supported graphene composite material.

[0042] The nickel diselenide-graphene composite material prepared in Example 3 was used as the negative electrode material of the sodium ion battery: the nickel diselenide-graphene composite material with a mass ...

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Abstract

The invention discloses preparation of a nickel disselenium-graphene composite material. The preparation comprises the following steps: adding graphene oxide into deionized water, adding a reducing agent, performing ultrasonic stirring till uniform dispersion, adding a selenium-containing substance and a nickel-containing inorganic salt, performing ultrasonic dispersion, putting the obtained mixedliquid into a hydrothermal synthesis kettle, keeping the temperature at 140-180 DEG C for 5-15 hours, performing a reaction, performing cooling, performing suction filtration separation on the product in the hydrothermal synthesis kettle, washing the product by using deionized water, and performing freeze drying, so as to obtain the nickel disselenium-graphene composite material. The invention relates to a one-step in-situ composite nickel disselenium-graphene composite material which can be used as a cathode material of a sodium ion battery and has good cycling stability and multiplying power specific energy.

Description

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Claims

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Application Information

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Owner BENGBU COLLEGE
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