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Dodecahedral porous Co3ZnC/C composite material preparation method and use of dodecahedral porous Co3ZnC/C composite material in lithium ion battery

A composite material and dodecahedron technology, applied in the field of new energy materials, can solve problems such as complex preparation process, poor performance, and harsh conditions, and achieve good repeatability, uniform shape, and good stability

Active Publication Date: 2016-10-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at defects such as complex preparation process, harsh conditions, and poor appearance and performance of the obtained materials in the existing synthesis technology and application of carbides, the first purpose of the present invention is to provide a nano-particle stacked and assembled Porous dodecahedral Co with uniform morphology, good stability, and porous properties 3 ZnC / C composite material and its preparation method

Method used

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  • Dodecahedral porous Co3ZnC/C composite material preparation method and use of dodecahedral porous Co3ZnC/C composite material in lithium ion battery
  • Dodecahedral porous Co3ZnC/C composite material preparation method and use of dodecahedral porous Co3ZnC/C composite material in lithium ion battery
  • Dodecahedral porous Co3ZnC/C composite material preparation method and use of dodecahedral porous Co3ZnC/C composite material in lithium ion battery

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Embodiment 1

[0058] According to the molar ratio of cobalt source and zinc source is 2: 1, get 3g polyvinylpyrrolidone and 20mmol cobalt nitrate, 10mmol zinc nitrate, dissolve in 200ml methanol to form a solution (dispersion), 160mmol 2-methylimidazole is dissolved in 200ml methanol, The latter was quickly added to the former and fully stirred for 1 hour, and purified at room temperature for 24 hours, resulting in a purple precipitate. The product was washed with methanol, dried in an oven, placed in a quartz crucible, and argon was introduced at 600 ° C. High temperature heat treatment, time is 8h, can get dodecahedral porous Co 3 ZnC / C composites.

[0059] The dodecahedral porous Co prepared by this embodiment 3 ZnC / C composites, Co 3 ZnC / C composite nano-particles are constructed to form a uniform dodecahedral structure rich in pores, and the particle size is 150-250nm. The specific surface area is 745m 2 / g.

[0060] The lithium-ion battery composite anode material prepared in thi...

Embodiment 2

[0066] According to the molar ratio of cobalt source and zinc source is 1: 1, get 3g polyvinylpyrrolidone and 10mmol cobalt nitrate, 10mmol zinc nitrate, dissolve in 200ml methanol to form a solution (dispersion), 80mmol 2-methylimidazole is dissolved in 200ml methanol, The latter was quickly added to the former and fully stirred for 1 hour, and purified at room temperature for 24 hours, resulting in a purple precipitate. The product was washed with methanol, dried in an oven, placed in a quartz crucible, and argon was introduced at 600 ° C. High temperature heat treatment, time is 6h, can get dodecahedral porous Co 3 ZnC / C composites.

[0067] The dodecahedral porous Co prepared by this embodiment 3 ZnC / C composites, Co 3 ZnC / C composite nano-particles are constructed to form a uniform dodecahedral structure rich in pores, and the particle size is 150-250nm. The specific surface area is 680m 2 / g.

[0068] Dodecahedral porous Co 3 When the electrode made of ZnC / C compos...

Embodiment 3

[0070] According to the molar ratio of cobalt source and zinc source is 1:1, take 2.0g polyvinylpyrrolidone and 10mmol cobalt nitrate, 10mmol zinc nitrate, dissolve in 200ml methanol to form a solution (dispersion), 160mmol 2-methylimidazole is dissolved in 200ml methanol , quickly add the latter to the former and fully stir for 1 hour, stand and purify at room temperature for 24 hours, and produce a purple precipitate, wash the product with methanol, dry it in an oven, place it in a quartz crucible, and blow it with argon at 650°C Perform high temperature heat treatment for 8 hours to obtain dodecahedral porous Co 3 ZnC / C composites.

[0071] The dodecahedral porous Co prepared by this embodiment 3 ZnC / C composites, Co 3 ZnC / C composite nanoparticles are constructed to form a uniform dodecahedral structure rich in pores, and the particle size is 300-400nm. The specific surface area is 720m 2 / g.

[0072] Dodecahedral porous Co 3 The electrode made of ZnC / C composite mater...

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Abstract

The invention discloses a preparation method of a dodecahedral porous Co3ZnC / C composite material. The preparation method comprises dispersing polyvinylpyrrolidone, a cobalt salt and a zinc salt in alcohol to obtain a dispersion liquid, adding 2-methylimidazole into the dispersion liquid, carrying out a stirring reaction process, standing purification and washing to obtain a precursor compound and carrying out heat treatment on the precursor compound at a temperature of 500-700 DEG C in a protective atmosphere to obtain the Co3ZnC / C composite material. The dodecahedral porous Co3ZnC / C composite material has uniform morphology, good stability and porous characteristics. The invention also discloses a use of the dodecahedral porous Co3ZnC / C composite material in a lithium ion battery. The dodecahedral porous Co3ZnC / C composite material as a negative electrode material can be used in a lithium ion battery. The dodecahedral porous Co3ZnC / C composite material guarantees a specific capacity and improves an electrode material rate capability and cycling stability. The preparation method has simple processes, realizes a low cost and has a good research prospect.

Description

technical field [0001] The invention belongs to the field of new energy materials, and relates to a preparation method of a lithium ion battery negative electrode material, in particular to a dodecahedral porous Co 3 Preparation of ZnC / C composites and their application in lithium-ion batteries. Background technique [0002] As an electrochemical energy storage device that occupies a dominant position in society, lithium-ion batteries have achieved rapid development in portable electronic products (notebook computers, smart mobile equipment, tablet computers, etc.) and electric vehicles, and have shown good development prospects . Lithium-ion battery is a secondary battery that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li + Intercalation and deintercalation back and forth between two electrodes: when charged, Li + It is deintercalated from the positive electrode, insert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M10/0525
CPCH01M4/364H01M4/58H01M10/0525Y02E60/10
Inventor 张治安宋俊肖陈晓彬卢伟亮陈昌官朝红赖延清
Owner CENT SOUTH UNIV
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