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Flexible electrode fibrous membrane, flexible electrode plate, and manufacturing method and application thereof

A flexible electrode and manufacturing method technology, which is applied in the manufacture of hybrid/electric double layer capacitors, active material electrodes, electrode carriers/collectors, etc., can solve the capacity decay of energy storage devices, active materials, conductive agent binders, etc. question

Inactive Publication Date: 2020-07-14
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the electrode sheet is bent or twisted to a certain extent, the active material, conductive agent, and binder in the electrode sheet are easy to fall off from the current collector, resulting in a sharp decline in the capacity of the energy storage device.

Method used

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  • Flexible electrode fibrous membrane, flexible electrode plate, and manufacturing method and application thereof
  • Flexible electrode fibrous membrane, flexible electrode plate, and manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The negative electrode sheet is produced through the following process:

[0044] Graphene, acetylene black, and polytetrafluoroethylene powder were mixed uniformly in a high-speed mixer in sequence according to the mass ratio of 90:2:8. Add isopropanol with a mass ratio of 200% to the above homogeneously mixed material, set the stirring speed of the high-speed mixer to 10000 rpm, and the time is 60 minutes to obtain a paste. Transfer the above paste to the screw extruder, the screw speed is 100rpm, and the heating temperature is 60°C; the material passes through the rotary propulsion device of the screw extruder and reaches the jetting die head of the slit drafting device, and is jetted into silk The hole diameter of the die head is 10μm, and the material is sprayed out from the spinneret hole to form a filament filled with fibrous thermoplastic binder, and then the filament is cooled and drawn by the airflow of the slit-type drafting device, and then reaches the convey...

Embodiment 2

[0048] The positive electrode sheet is produced through the following process:

[0049] Lithium iron phosphate, acetylene black, Ketjen black, and polytetrafluoroethylene powder were mixed in a high-speed mixer in sequence according to the mass ratio of 80:4:1:15. Add N-methylpyrrolidone with a mass ratio of 220% to the above homogeneously mixed materials, set the stirring speed of the high-speed mixer to 15000 rpm, and the time is 45 minutes to obtain a paste. Transfer the above paste to the screw extruder, the screw speed is 50rpm, and the heating temperature is 80°C; the material passes through the rotary propulsion device of the screw extruder and reaches the jet forming die head of the slit drafting device, and is sprayed into silk The hole diameter of the die head is 25μm, and the material is sprayed out from the spinneret hole to form a filament filled with fibrous thermoplastic binder, and then the filament is cooled and drawn by the airflow of the slit-type drafting d...

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Abstract

The invention provides a flexible electrode fibrous membrane, a flexible electrode plate and a manufacturing method and application thereof, and the method comprises the following steps: adding a volatile solvent into a mixed material containing a thermoplastic binder, and performing stirring to form a paste; carrying out fibration treatment on the paste under the action of high shear, and then spraying the paste to form filaments; drawing the filaments obtained by spraying, and then spreading the filaments into a fiber net; and rolling and molding the fiber net to obtain the flexible electrode fiber membrane. A three-dimensional network system is arranged among the active substance, the conductive agent and the thermoplastic adhesive in the flexible electrode fiber membrane to replace a point contact system in the traditional technology. While the conductivity of the whole flexible electrode fiber membrane is enhanced, the flexible electrode fiber membrane is endowed with strong physical strength and larger elastic modulus.

Description

technical field [0001] The invention belongs to technologies related to energy storage devices, and in particular relates to flexible electrode fiber membranes, flexible electrode sheets and their manufacturing methods and applications. Background technique [0002] At present, lithium-ion secondary batteries, supercapacitors, lithium-air batteries, etc. have become energy storage devices for many card-type or wearable smart devices, and they often encounter usage scenarios that need to be carried in wallets or pockets. Because energy storage devices are bulky but important, and cannot be adjusted well during assembly, product developers are always limited by the size, shape, and flexibility of energy storage devices when designing a new smart device . Therefore, the shape of most smart devices depends on the shape of their energy storage devices. [0003] Generally, the preparation method of the electrode sheet of the energy storage device is mainly to mix the active mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1393H01M4/1397H01M4/133H01M4/136H01M4/66H01M4/86H01M4/88H01M10/0525H01M12/08H01G11/24H01G11/26H01G11/28H01G11/32H01G11/40H01G11/46H01G11/70H01G11/72H01G11/86D01D1/06D01D4/02D01F1/09D01F1/10D04H3/005D04H3/10
CPCD01D1/065D01D4/02D01F1/09D01F1/10D04H3/005D04H3/10H01G11/24H01G11/26H01G11/28H01G11/32H01G11/40H01G11/46H01G11/70H01G11/72H01G11/86H01M4/133H01M4/136H01M4/1393H01M4/1397H01M4/667H01M4/86H01M4/8875H01M10/0525H01M12/08H01M2004/021H01M2004/022Y02E60/10
Inventor 郭德超郭义敏张啟文龙超昝亚辉慈祥云韩莉珺何凤荣
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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