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Biomass derived integrated flexible electrode and preparation method thereof

A flexible electrode and integrated technology, applied in the field of biomass-derived integrated flexible electrodes and their preparation, can solve the problems of unstable metal negative electrode, low active material loading, unstable positive electrode structure, etc., and avoid binders. The use, preparation method is simple, the effect of good gas transport and electron conduction performance

Inactive Publication Date: 2018-06-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the rapid development of new energy technologies, a large number of research results of metal-air batteries have been reported recently, but there are still many challenges before the application, such as: poor cycle stability, low energy efficiency, unstable electrolyte, unstable metal anode, The structure of the positive electrode is unstable, the active material loading of the cathode is low, and the catalytic layer is too thin, etc.

Method used

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  • Biomass derived integrated flexible electrode and preparation method thereof
  • Biomass derived integrated flexible electrode and preparation method thereof
  • Biomass derived integrated flexible electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation of biomass-derived integrated flexible electrodes specifically includes the following steps:

[0041] Take 300mg of kapok fiber and spread it evenly into 4*8cm 2 Put the thin layer in a muffle furnace at 280°C for 4 hours, then carbonize at 850°C for 4 hours under the protection of argon, and then activate it in carbon dioxide at 750°C for 5 hours. After natural cooling, carbon dioxide activated flexible carbon collectors are obtained, and biomass-derived CO2-activated integrated flexible electrodes.

[0042] The prepared integrated flexible electrode has a complete structure, good flexibility, a thickness of 300 μm, a bending radius of curvature of less than 2 mm, and a disc with a diameter of 7 mm can be used as an electrode.

[0043] The prepared integrated flexible electrode is composed of hollow carbon dioxide-activated kapok carbon fibers interlaced. The transparent activated kapok carbon fibers bend and collapse toward the middle. The diameter of...

Embodiment 2

[0047] The preparation of biomass-derived integrated flexible electrodes specifically includes the following steps:

[0048] Take 500mg of kapok fiber and spread it evenly into 4*8em 2 The thin layer was placed in a muffle furnace at 240°C for 8 hours, and then carbonized at 800°C for 4 hours under the protection of nitrogen gas. After natural cooling, a flexible carbon current collector, that is, the integrated flexible electrode derived from biomass, was obtained.

[0049] The prepared integrated flexible electrode has a complete structure, good flexibility and mechanical strength, a thickness of 600 μm, can be bent 180°, and the bending radius of curvature can be less than 2 mm; the basic component kapok fiber has a complete structure after carbonization, and the tube wall It collapses toward the middle and becomes flat, and the diameter of the pores in the middle is distributed between 5 and 15 μm.

Embodiment 3

[0051] The carbon dioxide-activated integrated flexible electrode in Example 1 and the biomass-derived integrated flexible electrode prepared in Example 2 were passed through ammonia gas at 950°C for 15 minutes, and after natural cooling, nitrogen-doped integrated flexible electrodes and Integrated flexible electrodes activated by nitrogen-doped carbon dioxide.

[0052] The prepared integrated flexible electrode has a complete structure, good flexibility and mechanical strength, can be bent 180°, and has a large number of micropores and mesoporous structures. Dispersion of further modified metal nanoparticles and adsorption of reactants.

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Abstract

The invention discloses a biomass derived integrated flexible electrode and a preparation method thereof. According to the preparation method, a biomass raw material is ground and subjected to formingpretreatment and carbonization, and a flexible carbon current collector, namely, the biomass derived integrated flexible electrode is obtained; the prepared integrated flexible electrode is further modified, and a modified integrated flexible electrode is obtained. Natural biomass with a porous structure is selected as the raw material in the preparation method, and on the basis of the special hollow structure of the biomass, gas transmission, liquid storage and electronic conduction of ions of the electrode are guaranteed effectively. By means of the pre-forming preparation way in the preparation method, morphology, size and thickness of the integrated flexible electrode are adjustable, and the process can be simplified effectively.

Description

technical field [0001] The invention relates to the technical field of integrated flexible electrode materials, in particular to a biomass-derived integrated flexible electrode and a preparation method thereof. Background technique [0002] As a new type of energy storage system, metal-air batteries have attracted people's attention because their theoretical storage energy is 5-10 times higher than that of lithium-ion batteries, and they are considered to be future power batteries. With the rapid development of new energy technologies, a large number of research results of metal-air batteries have been reported recently, but there are still many challenges before the application, such as: poor cycle stability, low energy efficiency, unstable electrolyte, unstable metal anode, The structure of the positive electrode is unstable, the active material loading of the cathode is low, and the catalytic layer is too thin. The focus of solving the above problems lies in the overall ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06H01M4/96H01M4/583H01M4/62H01G11/32H01G11/26
CPCH01G11/26H01G11/32H01M4/583H01M4/625H01M4/96H01M12/06Y02E60/10
Inventor 宋慧宇朱纯梁陈锡龙杜丽廖世军张晓娜
Owner SOUTH CHINA UNIV OF TECH
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