Compressible supercapacitor based on porous sponge structures

Abstract

The invention provides a compressible supercapacitor based on porous sponge structures and a preparation method. The compressible supercapacitor includes compressible electrodes, solid electrolytes and a flexible diaphragm, the compressible electrodes are of porous sponge structures, the solid electrolytes are permeated in the compressible electrodes, and the flexible diaphragm is between the twocompressible electrodes in which the solid electrolytes are permeated. The abovementioned compressible supercapacitor adopts the electrodes of porous sponge structures, the porous sponge structures have high compressible capability, the high compressible capability is combined with the characteristic of excellent charge storage capacity of an attached active material, the electrodes of porous sponge structures are obtained by performing film inverting dissolution on substances such as cube sugar, the advantages of high compression resistance and large specific surface area of the sponge structures and high electrical conductivity of a carbon nano tube are utilized, the compressible supercapacitor has excellent mechanical property and electrical property, can be applied to various energy storage devices and stress sensing functional devices, has the advantages of simple preparation technology, high integration level, stable device performance and the like, and has very good applicationprospects in the fields of low-power consumption electronic devices and wearable devices.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a compressible supercapacitor based on a porous sponge structure and a preparation method thereof. Background technique [0002] With the rapid development of various portable electronic devices, the demand for matching energy units and functional devices is increasing. Compared with rechargeable batteries and traditional capacitors, supercapacitors, as an emerging energy storage device, have good application prospects due to their high power density, good cycle stability, and fast charge and discharge speed. Research. [0003] Nowadays, scientific researchers have done a lot of work on the flexibility of electrode materials and processing methods for applications such as wearable electronics and low-power systems, especially flexible solid-state supercapacitors with good stability, which can avoid electrolyte leakage. Improving the safety and stability of the device, a...

AI Technical Summary

Problems solved by technology

However, existing compressible supercapacitors still face many problems

On the one hand, the sponges are mostly carbon-based substances, with average mechanical properties, unable to withstand large stresses, and easy to collapse; on the other hand, due to the hydrophobic nature of some materials used, the penetration of electrolytes is hindered to a certain extent, affecting the Its electrochemical performance

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