CNF-TMO lithium ion battery anode material and preparation method thereof and application of CNF-TMO lithium ion battery anode material

A technology for lithium ion batteries and negative electrode materials, which is applied in battery electrodes, nanotechnology for materials and surface science, negative electrodes, etc. The problem of slow reaction kinetics, etc., can achieve the effects of increasing the length, easy control of reaction temperature and time, and improving material stability and conductivity.

Pending Publication Date: 2019-10-25
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since Li + The slow electrochemical reaction kinetics and large volume expansion during intercalation and deintercalation hinder the practical application of transition metal oxide-based anode materials.

Method used

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  • CNF-TMO lithium ion battery anode material and preparation method thereof and application of CNF-TMO lithium ion battery anode material
  • CNF-TMO lithium ion battery anode material and preparation method thereof and application of CNF-TMO lithium ion battery anode material
  • CNF-TMO lithium ion battery anode material and preparation method thereof and application of CNF-TMO lithium ion battery anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) 1g cobalt acetate (Co(Ac) 2 4H 2 O) Dissolve in 18g dimethylacetamide (DMAc), add 2g polyvinylpyrrolidone (PVP) powder after dissolving completely, stir 24h, obtain the homogeneous mixing spinning solution that polyvinylpyrrolidone solid content is 9%.

[0033] (2) Put the mixed spinning solution in a 10ml syringe, use a 20G stainless steel needle, set the spinning parameters: advance speed 0.8ml / h, voltage 20kV, spinning distance 18cm, use a drum to receive, and spin; After completion, remove it and dry it in an oven at 60°C to obtain PVP-Co(Ac) 2 Non-woven fabrics are metal salt and polymer blended fibers.

[0034] (3) dissolving terephthalic acid in methanol to form a solution with a concentration of 0.15mol / L, the PVP-Co(Ac) obtained in step (2) 2 The non-woven fabric is soaked in it for 12 hours. Due to the coordination of cobalt ions and terephthalic acid, a layer of MOF can be formed on the surface of the fiber. After taking it out, dry it in an oven at 60...

Embodiment 2

[0040] (1) 1g nickel acetate (Ni(Ac) 2 4H 2 O) and 2g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) Dissolve in 18g dimethylacetamide (DMAc), add 3.7g polyvinylpyrrolidone (PVP) powder after dissolving completely, stir 24h, obtain the homogeneous mixing spinning solution that polyvinylpyrrolidone solid content is 15%.

[0041] (2) Put the mixed spinning solution in a 10ml syringe, use a 22G stainless steel needle, set the spinning parameters: advance speed 0.6ml / h, voltage 19kV, spinning distance 20cm, use a drum to receive, and spin; After completion, remove it and dry it in an oven at 60°C to obtain PVP-Ni(Ac) 2 -Co(NO 3 ) 2 Non-woven fabrics are metal salt and polymer blended fibers.

[0042] (3) dissolving terephthalic acid in methanol to form a solution with a concentration of 0.05mol / L, the PVP-Ni(Ac) obtained in step (2) 2 -Co(NO 3 ) 2 The non-woven fabric is soaked in it for 12 hours. Due to the coordination of nickel, cobalt ions and terephthalic acid, a layer of MOF...

Embodiment 3

[0048] (1) 4g zinc acetate (Zn(Ac) 2 4H 2 O) be dissolved in 16g dimethylacetamide (DMAc), after dissolving completely, add 3g polyacrylonitrile (PAN) powder, stir 24h, obtain polyacrylonitrile solid content and be the homogeneous mixing spinning solution of 13%.

[0049] (2) Put the mixed spinning solution in a 10ml syringe, use a 18G stainless steel needle, set the spinning parameters: advance speed 1.2ml / h, voltage 14kV, spinning distance 22cm, use a drum to receive, and spin; After completion, remove it and dry it in an oven at 60°C to obtain PAN-Zn(Ac) 2 Non-woven fabrics are metal salt and polymer blended fibers.

[0050] (3) Trimellitic acid is dissolved in methanol to form a solution with a concentration of 0.1mol / L, and the PAN-Zn(Ac) obtained in step (2) 2 The non-woven fabric was soaked in it for 12 hours. Due to the coordination of zinc ions and trimesic acid, a layer of MOF could be formed on the surface of the fiber. After taking it out, it was dried in an ove...

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Abstract

The invention belongs to the field of a lithium ion battery anode material and a preparation method thereof and application of a CNF-TMO lithium ion battery anode material. The method comprises the steps of: dissolving transition metal salt in an organic solvent, and adding polymer powder to fully dissolve and uniformly mix the transition metal salt and the polymer powder to obtain a spinning solution; performing spinning under the action of a high-voltage electrostatic field by setting spinning parameters to obtain a polymer-transition metal salt non-woven fabric; soaking the polymer-transition metal salt non-woven fabric in methanol solution of organic ligand to form one layer of organic metal frame material on the surface of the polymer fiber homogeneously under the action of the strongcoordination between the transition metal ion and the organic ligand to obtain a polymer-transition metal salt-organic metal frame material; then putting the polymer-transition metal salt-organic metal frame material into a tubular furnace, performing carbonizing of the polymer-transition metal salt-organic metal frame material at a high temperature under the flow of hydrogen/argon mixed gas to obtain carbon nano fiber-transition metal, thermally oxidizing the carbon nano fiber-transition metal in air, grinding and crushing the carbon nano fiber-transition metal to obtain a CNF-TMO lithium ion battery anode material.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a CNF-TMO lithium ion battery negative electrode material and a preparation method and application thereof. Background technique [0002] As a promising energy storage device, lithium-ion batteries have attracted extensive attention in recent years. At the same time, with the rapid development of new energy vehicles and smart portable devices, there is an urgent need for energy storage devices with higher reversible capacity and long cycle life. However, currently commercially available graphite electrodes have a low theoretical capacity (372mAhg -1 ), which cannot meet today's high energy density and high power density battery market demand. Transition metal oxides have great potential applications due to their higher capacity and safety than conventional graphite electrodes. However, since Li + The slow electrochemical reaction kinetics and large volume expa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/583H01M4/62H01M10/0525B82Y30/00B82Y40/00D01D5/00D04H1/728
CPCH01M4/362H01M4/483H01M4/583H01M4/625H01M10/0525B82Y30/00B82Y40/00D01D5/0015D04H1/728H01M2004/027Y02E60/10
Inventor 蔡俊杰王凌志曹景茹陈妙玲张增耀
Owner GUANGDONG UNIV OF TECH
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