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A three-dimensional porous elastic membrane and its preparation and application

A three-dimensional porous and elastic technology, applied in the direction of batteries, structural parts, electrical components, etc., can solve the problems of poor mechanical properties of gel electrolyte, poor battery rate performance, and low ion conductivity, so as to improve reliability and safety, The effect of good mechanical properties and high ionic conductivity

Active Publication Date: 2022-05-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with liquid electrolytes, the ionic conductivity of gel electrolytes is low, resulting in poor rate performance of assembled batteries.
At the same time, the mechanical properties of the gel electrolyte are poor, and it is easy to break during repeated stretching, resulting in contact between the positive and negative electrodes, resulting in an internal short circuit

Method used

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  • A three-dimensional porous elastic membrane and its preparation and application
  • A three-dimensional porous elastic membrane and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (Styrene Butadiene Rubber Prepared Elastic Diaphragm)

[0026] Weigh 1.0 g of styrene-butadiene rubber (elastic polymer) and add it into 9.0 g of toluene, and stir for several hours until completely dissolved to form a 10% polymer solution. Spread the mixed solution on a glass plate, set the film thickness to 200 μm, then quickly immerse in 5L of ethanol for 30 minutes, cure, and dry at 50°C for 12 hours to obtain the final styrene-butadiene rubber elastic diaphragm. Na 3 V 2 (PO 4 ) 3 The @C electrode is used as the working electrode, the metal sodium sheet is used as the negative electrode, the prepared elastic diaphragm is used as the diaphragm, the solute is 1MNaClO4, the solvent EC (ethylene carbonate) and PC (propylene carbonate) mixture (mass ratio 1:1), the additive is mass The FEC with a fraction of 5% is used as the electrolyte, and the CR2016 button case is stacked and pressed in sequence in the order of negative electrode case, negative electrode, electr...

Embodiment 2

[0028] (Polyisoprene to prepare elastic membrane)

[0029] Weigh 1.0 g of polyisoprene (elastic polymer) and add it into 9.0 g of toluene, and stir for several hours until completely dissolved to form a 10% polymer solution. Spread the mixed solution on a glass plate, set the film thickness to 200 μm, then quickly immerse in 5L of ethanol for 30 minutes, cure, and dry at 50°C for 12 hours to obtain the final polyisoprene elastic membrane. The battery assembly is the same as in Example 1.

Embodiment 3

[0031] (Polystyrene-polybutadiene-polystyrene block copolymer to prepare elastic diaphragm)

[0032] Weigh 1.0 g of polystyrene-polybutadiene-polystyrene block copolymer (elastic polymer) into 9.0 g of toluene, stir for several hours until completely dissolved, and form a 10% polymer solution. Spread the mixed solution on a glass plate, set the film thickness to 200 μm, then quickly immerse in 5L of ethanol for 30 minutes, cure, and dry at 50°C for 12 hours to obtain the final polystyrene-polybutadiene-polystyrene block Copolymer elastic diaphragm.

[0033] The battery assembly is the same as in Example 1.

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Abstract

The invention provides a three-dimensional porous elastic diaphragm and its preparation and application. Compared with the currently used gel electrolyte elastic diaphragm, the three-dimensional porous solid diaphragm has better mechanical properties and higher elasticity, and does not suffer from repeated expansion and contraction. There will be damage, which prevents the occurrence of internal short circuit; compared with the gel state electrolyte, the liquid electrolyte filled in the membrane has higher ion conductivity, and the battery rate performance of the assembly is more excellent; at the same time, the preparation process of this method is simple, Low energy consumption, suitable for mass production.

Description

technical field [0001] The invention belongs to the field of elastic battery diaphragms, and discloses a three-dimensional porous elastic diaphragm, a preparation method and an application thereof. Background technique [0002] Elastic electronics have attracted increasing attention for their potential applications in wearable devices, implantable medical devices, electronic skins, and more. To meet the requirements of reliable elastic electronics, it is crucial to develop deformable energy storage devices. At present, some studies have successfully prepared deformable power devices, such as elastic lithium-ion batteries, elastic sodium-ion batteries, elastic supercapacitors, elastic silver-zinc batteries, etc. However, the current work mainly focuses on the preparation of elastic electrodes and the design of elastic structures, and there is little research on separators. As a key component of batteries, the development of separators is crucial to the study of elastic devi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/403H01M50/411H01M50/417H01M10/0565H01M10/054
CPCH01M10/0565H01M10/054H01M2220/30Y02E60/10
Inventor 郑琼李先锋易红明张华民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI