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All-solid flexible integrated battery and its preparation method using 3D printing

A 3D printing, all-solid-state technology, applied in the direction of solid electrolyte, electrolyte battery manufacturing, electrode manufacturing, etc., can solve problems such as hindering energy density, power density, restricting battery shape, restricting development and application, etc., to achieve safety, reliability, and rate performance The effect of high and wide application prospects

Active Publication Date: 2019-08-23
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing flexible battery manufacturing methods can only obtain planar layered flexible electrodes or batteries, which not only limits the shape of the battery, but also hinders the improvement of energy density and power density, thereby limiting its own development and application.

Method used

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  • All-solid flexible integrated battery and its preparation method using 3D printing
  • All-solid flexible integrated battery and its preparation method using 3D printing
  • All-solid flexible integrated battery and its preparation method using 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] S1, grooved

[0091] Raw materials: photoresist SU-8, developer, acetone

[0092] Equipment: UV exposure machine, homogenizer, heating plate, plasma etching machine

[0093] Preparation process: Pre-bake the flexible substrate with a heating plate for 8 minutes, set the temperature at 180°C, and then evenly coat a layer of SU-8 photoresist on the flexible substrate with a coater, and coat the photoresist The flexible substrate is post-baked for 8 minutes, and the temperature is still 180°C; use with Figure 1 Cover the flexible substrate with a light-shielding plate of the same size as the non-groove base part shown. After being irradiated by a UV exposure machine for 6s, soaked in the developer solution for 13s, and then use a plasma etching machine (ICP) to etch the flexible substrate, the exposed area is etched Then wash off the photoresist with acetone to obtain a rectangular parallelepiped groove with ear positions reserved. The flexible substrate is PI; its len...

Embodiment 2

[0119] S1, grooved

[0120] Other conditions are the same as in Example 1, except that the substrate is PET;

[0121] S2, preparation of current collector by vacuum evaporation method

[0122] Completely consistent with this step of Example 1

[0123] S3, preparation of positive electrode, negative electrode and electrolyte ink

[0124] Raw materials: lithium cobaltate is used as the positive active material, graphite is used as the negative active material; graphitized multi-walled carbon nanotubes are used as the toughening agent; carboxymethyl cellulose is used as the thickener; deionized water and ethanol are used as the solvent, and CTAB is used as the dispersant .

[0125] Equipment: electromagnetic stirrer, electromagnetic stirring constant temperature water bath

[0126] Preparation Process:

[0127] First add 9.84mg of dispersant CTAB to the mixture of 9ml of deionized water and 6ml of ethanol, stir and dissolve, add 45mg of carbon nanotubes, and after ultrasonic...

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Abstract

The invention relates to an all-solid-state flexible integrated battery and a preparation method using 3D printing. The all-solid-state flexible integrated battery includes a flexible shell, a flexible positive electrode, a flexible negative electrode, and a flexible solid electrolyte. The preparation method is to first etch a groove of the required shape on the flexible substrate according to the designed size, and then deposit metal aluminum and metal copper on the bottom surface of the groove as the positive electrode current collector and the negative electrode current collector respectively; add the configured positive electrode ink and negative electrode The inks are installed in syringes and printed layer by layer on the positive electrode current collector and the negative electrode current collector using a 3D printer to form a multi-layer positive electrode and a multi-layer negative electrode; the electrolyte ink is printed between the multi-layer positive electrode and the multi-layer negative electrode. time, an electrolyte is formed. The present invention combines 3D printing technology with the manufacturing of all-solid-state flexible batteries to obtain products with high safety, wearability, high energy density, good cycle performance, and high rate performance. At the same time, its preparation is convenient and controllable. Convenient for large-scale application.

Description

Technical field [0001] The invention relates to an all-solid-state flexible integrated battery and a preparation method using 3D printing; it belongs to the technical fields of energy devices, all-solid-state batteries, and flexible battery design and preparation. Background technique [0002] Compared with traditional batteries using liquid electrolytes, all-solid-state batteries do not have to worry about the danger of electrolyte leakage and are safer; the decomposition voltage of the liquid electrolyte will limit the potential window of the battery and reduce the energy density of the battery. All-solid-state batteries can be used Wider potential window, increased energy density. [0003] With the development of wearable electronic devices, there is a corresponding demand for flexible energy storage devices, of which flexible batteries are the most typical representative. Flexible batteries can withstand certain deformation and stretching without deteriorating their per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M10/0525H01M10/054H01M10/058B33Y10/00B29C64/106
CPCB33Y10/00H01M4/0433H01M10/0525H01M10/054H01M10/058H01M2300/0082H01M2300/0085Y02E60/10Y02P70/50
Inventor 陈立宝周林韦伟峰
Owner CENT SOUTH UNIV