Hollow biological carbon sphere-based nickel sulfide nanorod supercapacitor and preparation method

A supercapacitor and nickel sulfide technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as capacity attenuation, achieve the effect of improving stability and specific capacity, and suppressing volume effect

Active Publication Date: 2019-07-26
QILU UNIV OF TECH
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Problems solved by technology

However, the oxidation-reduction reaction of nickel sulfide in its charge and

Method used

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  • Hollow biological carbon sphere-based nickel sulfide nanorod supercapacitor and preparation method
  • Hollow biological carbon sphere-based nickel sulfide nanorod supercapacitor and preparation method
  • Hollow biological carbon sphere-based nickel sulfide nanorod supercapacitor and preparation method

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Example Embodiment

[0008] The technical scheme of the present invention is as follows:

[0009] A hollow biological carbon ball-based nickel sulfide nanorod supercapacitor, comprising the following steps:

[0010] The preparation method of the hollow biological carbon sphere-based nickel sulfide nanorod supercapacitor comprises the following steps:

[0011] (1) Dissolve dry yeast in aqueous glucose solution, cultivate for 30 min to prepare yeast solution, and then centrifuge to remove cytoplasm;

[0012] (2) the yeast obtained in step (1) is placed in the reactor and 15 mL of water and 1 mL of glutaraldehyde solution are added;

[0013] (3) stirring the solution obtained in step (2) in the reactor for 1 h, then at a constant temperature of 180 ° C for 12 h, centrifugal washing and drying;

[0014] (4) placing the dried brown-red sample obtained in step (3) in a muffle furnace to raise the temperature to 300°C at a heating rate of 1°C / min and keep the temperature constant for 1 h;

[0015] (5)...

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Abstract

The invention discloses a preparation method of a nickel sulfide nanorod loaded hollow biological carbon shell supercapacitor; specifically, biological yeast is added into a mixed solution of glutaraldehyde and deionized water to be subjected to hydrothermal reaction for 12h at 180 DEG C, and a brown red sample is collected by centrifugal drying. The collected sample is then added into a muffle furnace to be heated to 300 DEG C at the heating rate of 1 DEG C/min and the temperature is kept for 1h; the collected black sample is placed into a tubular furnace to be heated to 800 DEG C at the heating rate of 2 DEG C/min and the temperature is kept for 3h to obtain a hollow nitrogen-doped biological carbon shell. The hollow nitrogen-doped biological carbon shell is added to a mixed solution ofnickel nitrate, thiourea and sodium phosphite to carry out ultrasonic wave and stirring treatment; then hydrothermal reaction is performed at 180 DEG C for 6 hours, and then centrifugal drying is carried out to obtain a NiS/NHCS composite sample. The preparation method disclosed by the invention is characterized in that green and environment-friendly cheap biological yeast is used in the preparation process; the hollow nitrogen-doped biological carbon shell is coated with nickel sulfide so as to better improve the specific capacity, the rate performance and the stability of the nickel sulfide.In the long-time oxidation reaction process, the damage of the loaded nickel sulfide nanorod to the hollow nitrogen-doped biological carbon shell is reduced, the specific surface area is enlarged, the conductivity of the composite material is increased, and the prepared composite material has high rate performance.

Description

technical field [0001] The invention relates to a high-capacity hollow biological carbon sphere-based nickel sulfide nanorod supercapacitor and a preparation method thereof, in particular to a supercapacitor with high stability and high specific capacity and a preparation method thereof. Background technique [0002] The increasing demand for large-scale energy storage systems for renewable energy has accelerated the research and development of new high-performance energy storage devices. People have been seeking new types of energy storage devices, supercapacitors, which have higher safety and lower cost than advanced batteries. Energy storage and conversion devices, especially supercapacitors, have received increasing attention due to better utilization of renewable resources. Supercapacitors are also considered as one of the most promising devices due to their fast charge and discharge capabilities, high cycle life, and high power density. Compared with rechargeable bat...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/84
CPCH01G11/24H01G11/30H01G11/32H01G11/84Y02E60/13
Inventor 魏明志张学涛卢启芳郭恩言
Owner QILU UNIV OF TECH
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