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A hollow nickel-nickel oxide nanoparticle/porous carbon nanosheet composite material and its preparation method and application

A nanoparticle and composite material technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as poor electrochemical performance, and achieve fast electrochemical reaction rate and large specific surface area , Improve the effect of electrochemical performance

Active Publication Date: 2020-10-09
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrochemical performance of one of the methods used alone is not good, so the present invention contemplates that if the above two strategies can be combined, the prepared composite material may show unprecedented excellent electrical properties when used in the negative electrode of a sodium ion battery. chemical properties

Method used

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  • A hollow nickel-nickel oxide nanoparticle/porous carbon nanosheet composite material and its preparation method and application
  • A hollow nickel-nickel oxide nanoparticle/porous carbon nanosheet composite material and its preparation method and application
  • A hollow nickel-nickel oxide nanoparticle/porous carbon nanosheet composite material and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The preparation process and steps in this embodiment are as follows:

[0052] (1) Weigh 0.582g Ni(NO 3 ) 2 ·6H 2 O, 1.8g C 6 h 12 o 6 and 14g NaCl, dissolved in 40ml water to obtain a green and transparent mixed solution, which was dried in an electric oven at 80°C for 24 hours;

[0053] (2) The obtained massive solid Ni(NO 3 ) 2 -C 6 h 12 o 6 / NaCl was ground into powder, kept at 750°C for 2 hours under the protection of argon, and then naturally cooled to room temperature;

[0054] (3) Anneal the obtained Ni / C / NaCl black powder at 300°C for 4 hours in the air to obtain Ni-NiO / C / NaCl powder, then wash and dry it with ultrapure water to finally obtain Ni-NiO / NaCl powder PCNs composites.

[0055] The hollow nickel-nickel oxide nanoparticles / porous carbon nanosheet composite (Ni-NiO / PCNs) obtained by the above preparation method is used as an electrode material for a sodium-ion battery for electrochemical performance testing, including the following steps:

...

Embodiment 2

[0062] The preparation process and steps in this embodiment are as follows:

[0063] (1) Weigh 0.582g Ni(NO 3 ) 2 ·6H 2 O and 1.8g C 6 h 12 o 6 Dissolved in 40ml of water to obtain a green and transparent mixed solution, which was dried in an electric oven at 80°C for 24 hours;

[0064] (2) The obtained massive solid Ni(NO 3 ) 2 -C 6 h 12 o 6 Grind into powder, keep warm at 750°C for 2 hours under the protection of argon, and then cool naturally to room temperature;

[0065] (3) The obtained Ni / C black powder was annealed in air at 300° C. for 4 h to obtain Ni-NiO / C composite material powder.

[0066] The hollow nickel-nickel oxide nanoparticle / carbon composite material (Ni-NiO / C) that above-mentioned preparation method obtains carries out electrochemical performance test as the electrode material of sodium ion battery, comprises the following steps:

[0067] a. Preparation of working electrode: first mix active material Ni-NiO / C composite material, conductive carb...

Embodiment 3

[0072] The preparation process and steps in this embodiment are as follows:

[0073] (1) Weigh 0.582g Ni(NO 3 ) 2 ·6H 2 O, 1.8g C 6 h 12 o 6 and 14g NaCl, dissolved in 40ml water to obtain a green and transparent mixed solution, which was dried in an electric oven at 80°C for 24 hours;

[0074] (2) The obtained massive solid Ni(NO 3 ) 2 -C 6 h 12 o 6 / NaCl was ground into powder, kept at 750°C for 2 hours under the protection of argon, and then naturally cooled to room temperature;

[0075] (3) The obtained Ni / C / NaCl black powder was annealed at 200°C for 4h in the air to obtain Ni / C / NaCl powder, which was then washed and dried with ultrapure water to finally obtain Ni / PCNs (200°C -4h) Composite materials.

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Abstract

The invention relates to a hollow nickel-nickel oxide nanometer particle / porous carbon nanometer sheet composite material, a preparation method and application thereof, and belongs to the technical field of sodium-ion battery negative electrode materials. According to the method, a Ni-NiO / PCNs composite material is formed through a sol-gel method, Ni / C / NaCl or Ni / C powder is taken as a precursor,and the Ni-NiO / PCNs composite material is finally formed through annealing, cleaning and drying. When the material serves as a sodium-ion battery negative electrode material, compared with a Ni-NiO / PCNs composite material without a NaCl template, the composite material has a more excellent chemical property. When the discharge current density is 0.1 Ag<-1>, the composite material has higher discharge capacity of 446.5 vs. 131.1 mAh g<-1>; and when the discharge current density is 2 Ag<-1>, the high rate performance is obviously improved by 266.8 vs. 18.9 mAh g<-1>. Most important of all, whenthe current density is 1A g<-1> and circulation is performed for 5000 circles, the composite material capacity still keeps 235.4mAh g<-1>. The composite material provides a novel thought for further improving the electrochemical characteristics of energy storage equipment.

Description

technical field [0001] The invention belongs to the technical field of preparation of negative electrode materials for sodium ion batteries. Background technique [0002] Lithium-ion batteries have high energy density and power density, and have been widely used in portable electronic devices, electric vehicles, etc. However, the limited and uneven distribution of lithium resources has become a bottleneck in the development of low-cost large-scale energy storage batteries. In recent years, Na-ion batteries have attracted increasing attention due to their low cost, abundant storage, and the same storage mechanism as Li-ion batteries. Due to the larger radius of sodium ions than that of lithium ions, graphite used as anode for commercial lithium-ion batteries exhibits poor electrochemical performance when used as anode for sodium-ion batteries. Therefore, it is crucial to study anode materials for Na-ion batteries that can replace graphite with low cost, high capacity, and l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/364H01M4/523H01M4/625H01M4/626H01M4/628H01M10/054Y02E60/10
Inventor 杨春成张冬梅崔荣超文子赵明李建忱蒋青
Owner JILIN UNIV