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A kind of flexible material and its preparation method and application

A technology of flexible materials and flexible electrodes, applied in the field of materials, can solve the problems of unfavorable wide application of flexible anode materials and high cost of carbon support materials

Active Publication Date: 2021-04-20
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of carbon support materials used in the above technologies is relatively high, which is not conducive to Fe 3 o 4 Wide application of flexible anode materials

Method used

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  • A kind of flexible material and its preparation method and application
  • A kind of flexible material and its preparation method and application
  • A kind of flexible material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A kind of flexible material, it is loaded ferric oxide (Fe 3 o 4 ) carbonized cotton, its preparation steps are as follows:

[0054] 1) Take a 6cm×6cm×0.3cm piece of pure cotton and put it into a tube furnace. Under the protection of high-purity argon, heat up to 600℃ at a rate of 2℃ / min, keep the temperature for 2h, and then cool slowly with the furnace. Get 4cm×4cm×0.2cm carbonized cotton;

[0055] 2) At room temperature, configure 60mL Fe(NO 3 ) 3 9H 2 O and Na 2 SO 4 A mixed solution with a concentration of 0.05mol / L. After soaking the above-mentioned carbonized cotton in the mixed solution for 30 minutes, transfer the solution and carbonized cotton to a 100mL stainless steel autoclave lined with polytetrafluoroethylene, seal it and put it into a box-type Furnace, heat up to 110°C at 2°C / min, keep the temperature for 6h, take it out after cooling, wash with deionized water and ethanol, and dry at 60°C for 8h to obtain the carbonized cotton / iron oxyhydroxide p...

Embodiment 2

[0058] A kind of flexible material, it is loaded ferric oxide (Fe 3 o 4 ) carbonized cotton, its preparation steps are as follows:

[0059] 1) Take a 8cm×8cm×0.25cm piece of pure cotton and put it into a tube furnace. Under the protection of high-purity argon, heat up to 800℃ at a rate of 2℃ / min, keep the temperature for 2 hours, and then cool slowly with the furnace. Get 5cm × 5cm × 0.15cm carbonized cotton, its appearance is as figure 1 ;

[0060] 2) At room temperature, configure 60mL Fe(NO 3 ) 3 9H 2 O and Na 2 SO 4 A mixed solution with a concentration of 0.05mol / L. After soaking the above-mentioned carbonized cotton in the mixed solution for 30 minutes, transfer the solution and carbonized cotton to a 100mL stainless steel autoclave lined with polytetrafluoroethylene, seal it and put it into a box-type furnace, heated up to 110°C at 2°C / min, kept at constant temperature for 6h, took it out after cooling, washed with deionized water and ethanol, and dried at 60°C ...

Embodiment 3

[0063] A kind of flexible material, it is loaded ferric oxide (Fe 3 o 4 ) carbonized cotton, its preparation steps are as follows:

[0064] 1) Take a 7cm×7cm×0.4cm piece of pure cotton and put it into a tube furnace. Under the protection of high-purity argon, heat up to 1000℃ at a rate of 2℃ / min, keep the temperature for 2 hours, and then cool slowly with the furnace. Get 4.5cm×4.5cm×0.25cm carbonized cotton;

[0065] 2) At room temperature, configure 60mL Fe(NO 3 ) 3 9H 2 O and Na 2 SO 4 A mixed solution with a concentration of 0.05mol / L. After soaking the above-mentioned carbonized cotton in the mixed solution for 30 minutes, transfer the solution and carbonized cotton to a 100mL stainless steel autoclave lined with polytetrafluoroethylene, seal it and put it into a box-type Furnace, heat up to 110°C at 2°C / min, keep the temperature for 6h, take it out after cooling, wash with deionized water and ethanol, and dry at 60°C for 8h to obtain the carbonized cotton / iron oxy...

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Abstract

The invention discloses a flexible material, a preparation method and application thereof. The flexible material is carbonized cotton loaded with ferric oxide. The carbonized cotton in the flexible material is cheap and easy to obtain, and has a three-dimensional network structure, while the ferroferric oxide has a nanoscale one-dimensional needle-like structure, and the flexible material has a three-dimensional porous structure. When it is used as a battery or When used as the active material of a capacitor, it is beneficial to alleviate its volume expansion / shrinkage effect in the process of charging and discharging, and it is used for lithium ion negative electrode materials with the characteristics of high specific capacity, good cycle performance, and good rate performance; and the preparation of the flexible material of the present invention The method is simple, efficient, environmentally friendly, and easy to promote, and flexible materials with different electrochemical properties can also be obtained by adjusting the cotton carbonization temperature, the concentration of the hydrothermal reaction system, and the reaction time and calcination temperature.

Description

technical field [0001] The invention relates to the field of materials, in particular to a flexible material and its preparation method and application. Background technique [0002] In 2012, Nokia Corporation proposed a flexible folding concept mobile phone, which can be bent and restored at will, and can cooperate well with the human body, so it has received widespread attention; at present, with the rapid development of wearable consumer electronics and new energy vehicles, Research on flexible / foldable optoelectronic devices has attracted much attention; at the same time, electronic devices are developing in the direction of thinness and flexibility, and the development of flexible energy storage devices as power sources for flexible electronic products has been proposed. Research hotspot in the field of ion batteries. [0003] Transition metal oxides have been widely studied in the field of lithium-ion battery electrode materials due to their high specific capacity. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/0525
CPCH01M4/362H01M4/523H01M4/62H01M4/628H01M10/0525Y02E60/10
Inventor 王玉海苏志芳石光
Owner SOUTH CHINA NORMAL UNIVERSITY