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Electrode with excellent rate capability and current cycling performance

A technology of rate performance and cycle performance, applied in battery electrodes, electrode carriers/current collectors, nanotechnology for materials and surface science, etc. Excellent rate performance and cycle performance, good structural consistency, and the effect of increasing electrical conductivity

Inactive Publication Date: 2016-11-09
耿云花
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the research on electrospun inorganic nanofibers is basically in the initial stage. Inorganic nanofibers have potential applications in many fields such as high-temperature filtration, high-efficiency catalysis, biological tissue engineering, optoelectronic devices, and aerospace equipment. However, electrospun inorganic nanofibers The greater brittleness limits its application performance and scope. Therefore, it is a technical difficulty to develop nanofibers with simple production process, flexibility, continuity and structural consistency.

Method used

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  • Electrode with excellent rate capability and current cycling performance
  • Electrode with excellent rate capability and current cycling performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Weigh 1.1g of high molecular weight polyacrylamide, 0.8g of medium molecular weight polyacrylamide, 0.8g of low molecular weight polyacrylamide, and 2.3mmol of metal salt and 4.7mmol of precipitant and add to 2.9mL deionized water, put it in a constant temperature water bath at 70~88°C for 6 hours with magnetic stirring to dissolve it completely, forming a transparent solution; the metal salt is selected from ferric nitrate; the precipitant is selected from phosphoric acid;

[0022] 2) Add the precursor solution in step 1) to the injection, perform electrospinning under the conditions of positive high voltage 18kV and negative high voltage -1.8kV, receive nanofibers with aluminum foil, adjust the distance between the needle and the receiving plate to 18 cm, spin The advancing speed of silk liquid is 1.4mL / h;

[0023] 3) Place the nanofibers obtained in step 2) in an oven at 120°C to dry for 5 hours;

[0024] 4) The composite nanofibers obtained by electrospinning in...

Embodiment 2

[0028] 1) Weigh 1g of high-molecular-weight polyacrylamide, 1g of medium-molecular-weight polyacrylamide, 0.8g of low-molecular-weight polyacrylamide, and 2mmol of metal salt and 5mmol of precipitant into 30mL of deionized water at the same time , put it in a constant temperature water bath at 70°C and magnetically stir for 6 hours to dissolve it completely to form a transparent solution; the metal salt is selected from magnesium chloride; the precipitant is selected from diammonium hydrogen phosphate;

[0029] 2) Add the precursor solution in step 1) to the injection, perform electrospinning under the conditions of positive high voltage 18kV and negative high voltage -1.4kV, use aluminum foil to receive nanofibers, adjust the distance between the needle and the receiving plate to 15 cm, spin The advancing speed of silk liquid is 1mL / h;

[0030] 3) Place the nanofibers obtained in step 2) in an oven at 120°C to dry for 5 hours;

[0031]4) The composite nanofibers obtained by ...

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Abstract

The invention provides an electrode with excellent rate capability and current cycling performance. The electrode is made of a specific nano material. A uniform sol precursor solution is prepared mainly from polymers with different molecular weights and metal salt, nano fiber is obtained through electrospinning, gradient heat treatment is conducted, and then the high-quality contractile nano material with an adjustable internal structure is obtained; decomposition of composition fiber is controlled by skillfully utilizing different heating rates of two stages, and a morphology with a nested structure where both layers face inwards is formed under accurate and convenient control.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemical devices Background technique [0002] With the development of science, major research has found that microscopic multi-level structures can make materials have many excellent properties. Due to the development of modern synthesis techniques and analytical tests, microscopic and nanomaterials also undergo this structural evolution from simple to complex. Furthermore, the third-generation micro / nanomaterials with more complex internal structures have greatly stimulated the research interest of many scientists in recent years because these structures have more excellent properties. In addition, one-dimensional nanostructures have aroused widespread interest among researchers due to their unique properties, and have achieved excellent electrochemical performance. Electrospinning has obvious advantages among all preparation methods. Electrospinning has become one of the mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66B82Y30/00D01F8/10D01F1/10
CPCB82Y30/00D01F1/10D01F8/10H01M4/667Y02E60/10
Inventor 耿云花
Owner 耿云花
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