Electrospinning preparation method for cobaltosic oxide carbon nanometer fibers for sodium-n battery

A carbon nanofiber, sodium-ion battery technology, applied in battery electrodes, nanotechnology for materials and surface science, nanotechnology and other directions, can solve the problem of limiting the large-scale use of sodium-ion battery anode materials, reducing the rate performance of electrode materials, Problems such as low electron/ion conductivity, to achieve the effect of promoting penetration and electron/ion transfer, excellent charge and discharge rate performance, and increasing specific surface area

Inactive Publication Date: 2017-05-31
XIJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But since Co 3 o 4 Its electronic / ionic conductivity is low, which reduces its rate performance as an electrode material, and its complex electrode manufacturing process limits its large-scale use as a negative electrode material for sodium-ion batteries

Method used

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  • Electrospinning preparation method for cobaltosic oxide carbon nanometer fibers for sodium-n battery
  • Electrospinning preparation method for cobaltosic oxide carbon nanometer fibers for sodium-n battery

Examples

Experimental program
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Embodiment 1

[0020] Embodiment 1, sodium ion battery uses Co 3 o 4 An electrospinning preparation method for carbon nanofibers, comprising the following steps:

[0021] 1) Configuration of electrospinning precursor body fluid: Co 2+ The salt is dissolved in the mixed solution of deionized water and organic solvent according to the volume ratio of 1:1, Co 2+ The mass volume ratio of the quality of the salt to the mixed solution of deionized water and organic solvent is 0.14g / mL; then add polyvinylpyrrolidone (PVP) powder to the mixed solution, and stir to obtain a uniform electrospinning precursor liquid (PVP) is 0.08g / mL with the mass volume ratio of deionized water and organic solvent mixed solution;

[0022] The Co 2+ The salt is cobalt nitrate;

[0023] Described organic solvent is ethanol;

[0024] Described polyvinylpyrrolidone (PVP) molecular weight is 1,300,000;

[0025] 2) Preparation of Co by electrospinning 2+ Salt / PVP composite fiber membrane: electrospinning with the el...

Embodiment 2

[0031] Embodiment 2, sodium ion battery uses Co 3 o 4 An electrospinning preparation method for carbon nanofibers, comprising the following steps:

[0032] 1) Configuration of electrospinning precursor body fluid: Co 2+ The salt is dissolved in the mixed solution of deionized water and organic solvent according to the volume ratio of 1:1, Co 2+ The mass-volume ratio of the quality of the salt to the mixed solution of deionized water and organic solvent is 0.16g / mL; (PVP) is 0.10g / mL with the mass volume ratio of deionized water and organic solvent mixed solution;

[0033] The Co 2+ The salt is cobalt chloride;

[0034] Described organic solvent is methanol;

[0035] Described polyvinylpyrrolidone (PVP) molecular weight is 1,300,000;

[0036] 2) Preparation of Co by electrospinning 2+ Salt / PVP composite fiber membrane: electrospinning with the electrospinning precursor liquid obtained in step 1) to obtain Co 2+ Salt / PVP composite fiber membrane, spinning voltage 12kV; ...

Embodiment 3

[0041] Embodiment 3, sodium ion battery uses Co 3 o 4 An electrospinning preparation method for carbon nanofibers, comprising the following steps:

[0042] 1) Configuration of electrospinning precursor body fluid: Co 2+ The salt is dissolved in the mixed solution of deionized water and organic solvent according to the volume ratio of 1:1, Co 2+ The mass-volume ratio of the quality of the salt to the mixed solution of deionized water and organic solvent is 0.18g / mL; The mass volume ratio of (PVP) and deionized water and organic solvent mixed solution is 0.12g / mL;

[0043] The Co 2+ The salt is cobalt sulfate;

[0044] The organic solvent is N,N-dimethylformamide (DMF);

[0045] Described polyvinylpyrrolidone (PVP) molecular weight is 1,300,000;

[0046] 2) Preparation of Co by electrospinning 2+ Salt / PVP composite fiber membrane: electrospinning with the electrospinning precursor liquid obtained in step 1) to obtain Co 2+ Salt / PVP composite fiber membrane, the spinning...

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Abstract

The invention discloses an electrospinning preparation method for cobaltosic oxide carbon nanometer fibers for a sodium-ion battery. An electrospinning precursor liquid is prepared from Co2+ salts, polyvinylpyrrolidone and an organic solvent, a Co2+ salt/PVP composite fiber membrane by adopting an electrospinning method, then preparing Co3O4 carbon nanometer fibers through an air atmosphere calcination technology, and prepared Co3O4 crystals have a regular hexagonal nano-sheet structure and are uniformly inlaid in the carbon nanometer fibers to enable a material to have larger specific surface area. According to the electrospinning preparation method, with unique carbon nanometer fiber porous structure and ultrathin nano-sheet crosslinking structure, permeation of electrolyte and electron/ion transfer are effectively promoted, the diffusion path of sodium ions in the material is shortened, embedding and disembedding of the sodium ions are facilitated, the capacitance is higher, the cycling stability is better, and the dynamics performance of the material is greatly improved. The electrospinning preparation method is simple in technology and low in cost.

Description

technical field [0001] The invention belongs to the technical field of negative electrode materials for sodium ion batteries, in particular to Co 3 o 4 Electrospinning preparation method of carbon nanofibers. Background technique [0002] In the past few decades, lithium-ion batteries have been widely used in various portable electronic devices and electric vehicles due to their high energy density and long service life. However, lithium resources are limited and expensive, which limits the large-scale application of lithium-ion batteries to a certain extent. Sodium and lithium are in the same main group in the periodic table and have similar physical and chemical properties. Sodium-ion batteries have attracted extensive attention due to their abundant sodium resources and environmental friendliness. The research and development of sodium-ion batteries can alleviate the limited development of batteries caused by the shortage of lithium resources to a certain extent, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362H01M4/523H01M4/625H01M10/054Y02E60/10
Inventor 辛督强王永仓徐强
Owner XIJING UNIV
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