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Internal high-defect carbon nanotube composite material with through structure in nickel cobalt catalytic tube and application thereof

A technology of cobalt nickel oxide catalytic tube and carbon nanotube, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of selenium fixation difficulty, selenium difficulty, small tube diameter, etc., and achieve Excellent sodium ion storage performance, enhanced adsorption capacity, and reduced impact effects

Pending Publication Date: 2021-06-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the diameter of carbon nanotubes is small, so it is difficult to load selenium inside the tubes, and the surface defects of carbon nanotubes are few, so it is difficult to fix selenium.

Method used

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  • Internal high-defect carbon nanotube composite material with through structure in nickel cobalt catalytic tube and application thereof
  • Internal high-defect carbon nanotube composite material with through structure in nickel cobalt catalytic tube and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Fully grind 0.1g of cobalt nitrate, 0.9g of nickel nitrate, and 2g of melamine in a mortar;

[0032] Step 2: Put the ground product in a quartz or alumina crucible, place the crucible in a tube furnace, and raise the temperature at a constant rate of 5°C / min under an argon atmosphere until the product is naturally heated to 700°C. The product is collected by cooling;

[0033] Step 3: Stand the obtained product in nitric acid with a concentration of 3M, corrode for 12 hours, separate the remaining solid, and dry;

[0034] Step 4: Mix the product obtained in Step 3 with selenium powder at a ratio of 2:3, place it in a reaction kettle under an argon atmosphere in a sealed glove box, heat it to 260° C. in a homogeneous reactor, and keep it warm for 12 hours to obtain CoNi@ Se / C.

Embodiment 2

[0036] Step 1: Fully grind 0.05g of cobalt nitrate, 0.95g of nickel nitrate and 2g of urea in a mortar;

[0037] Step 2: Put the ground product in a quartz or alumina crucible, place the crucible in a tube furnace, and raise the temperature at a constant rate of 10°C / min under an argon atmosphere to 600°C, and wait for the product to naturally The product is collected by cooling;

[0038] Step 3: Stand the obtained product in nitric acid with a concentration of 1M, corrode for 12 hours, separate the remaining solid, and dry;

[0039] Step 4: Mix the product obtained in Step 3 with selenium powder at a ratio of 1:4, place it in a reaction kettle under an argon atmosphere in a sealed glove box, heat it to 260° C. in a homogeneous reactor, and keep it warm for 12 hours to obtain

[0040] CoNi@Se / C.

Embodiment 3

[0042] Step 1: Fully grind 3g of cobalt nitrate, 2g of nickel nitrate, and 10g of urea in a mortar;

[0043] Step 2: Put the ground product in a quartz or alumina crucible, place the crucible in a tube furnace, and raise the temperature at a constant rate of 20°C / min under an argon atmosphere to 300°C, and wait for the product to naturally The product is collected by cooling;

[0044] Step 3: Stand the obtained product in nitric acid with a concentration of 0.5M, corrode for 12 hours, separate the remaining solid, and dry;

[0045] Step 4: Mix the product obtained in Step 3 with selenium powder at a ratio of 1:4, place it in a reaction kettle under an argon atmosphere in a sealed glove box, heat it to 260° C. in a homogeneous reactor, and keep it warm for 12 hours to obtain CoNi@ Se / C.

[0046] The sample of embodiment 1 is observed under a transmission electron microscope, from figure 1 It can be seen from the figure that the product presents bamboo-like carbon tubes with ...

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Abstract

The invention discloses an internal high-defect carbon nanotube composite material with a through structure in a nickel cobalt catalytic tube and application thereof. Selenium is loaded at the internal defect of a nanotube doped with internal defect CoNi / C in a solid phase manner; the CoNi@Se / C nanotube material is a bamboo-like carbon tube with a through structure; the invention relates to a sodium-selenium battery positive electrode containing a CoNi@Se / C nanotube material, and a sodium-selenium battery containing the sodium-selenium battery positive electrode. According to the invention, Se is loaded in a solid phase in the CoNi carbon nanotube material, so that CoNi@Se / C is obtained, the CoNi@Se / C material has excellent sodium ion storage performance, high charge-discharge capacity and good rate capability, and the conductivity and the structural stability of the material in the charge-discharge process can be remarkably improved.

Description

Technical field: [0001] The invention belongs to the technical field of batteries, and relates to battery electrode materials, in particular to an internal high-defect carbon nanotube composite material with a cobalt nickel oxide catalytic tube interpenetrating through the inner structure and an application thereof. [0002] technical background: [0003] The application of electrochemical energy storage technology has effectively solved the problems of storage, utilization and conversion of clean energy, and has broad development prospects in the future. At present, lithium-ion batteries are widely used in the field of electrochemical energy storage due to their excellent performance such as high energy density, high energy conversion rate and good safety. However, with the continuous research on lithium-ion batteries, the capacity of lithium-ion batteries has become difficult to increase. In order to meet the growing demand for large-scale energy storage equipment, we bega...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/38H01M4/13H01M10/054B82Y30/00B82Y40/00
CPCH01M4/38H01M4/625H01M4/628H01M4/13H01M10/054B82Y30/00B82Y40/00H01M2004/028H01M2004/021Y02E60/10
Inventor 李嘉胤胡云飞钱程张金津黄剑锋曹丽云许占位
Owner SHAANXI UNIV OF SCI & TECH
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