Printing flexible wearable electronics for smart device applications


The printed flexible supercapacitor with tailored patterns. Credit: Wei Wu’s group

The need for flexible wearable electronics has actually increased with the significant development of smart gadgets that can exchange information with other gadgets online with ingrained sensing units, software application, and other innovations. Researchers as a result have actually concentrated on checking out flexible energy storage gadgets, such as flexible supercapacitators (FSCs), that are light-weight and safe and quickly incorporate with other gadgets. FSCs have high power density and quick charge and discharge rates.


Printing electronics—production electronics gadgets and systems by utilizing standard printing strategies—has actually shown to be an affordable, basic, and scalable technique for producing FSCs. Traditional micromanufacturing strategies can be pricey and complex.

In Applied Physics Reviews, scientists from Wuhan University and Hunan University supply an evaluation of printed FSCs in regards to their capability to develop practical inks, style electrodes, and incorporate functions with other electronic gadgets.

Printed FSCs are normally made by printing the practical inks on conventional natural and inorganic electrode products on flexible substrates. Due to the thin movie structure, these printed gadgets can be bent, extended, and twisted to a specific radius without loss of electrochemical function.

In addition, the stiff existing collector elements of the supercapacitor can likewise be changed by the flexible printed parts. Various printing strategies such as screen printing, inkjet printing, and 3D printing have actually been well developed to produce the printed FSCs.

“The development of miniaturized, flexible, and planar high-performance electrochemical energy storage devices is an urgent requirement to promote the rapid development of portable electronic devices in daily life,” stated author Wu Wei. “We can imagine that in the future, we can use any printer in our lives and can print a supercapacitator to charge a mobile phone or smart wristband at any time.”

The scientists discovered for ink formulas, 2 concepts need to be followed. First, when choosing ink elements, it is crucial to consist of less inadequate ingredients, much better conductive binders, and exceptional dispersion electrode products. Second, the ink needs to have an appropriate viscosity and a great rheology residential or commercial property to acquire exceptional prints.

Printable practical products, such as graphene and pseudocapacitive products, are great core elements of printed supercapacitators.

Since printed electronics provide the benefit of versatility and low expense, they can be utilized to produce solar batteries, flexible OLED display screens, transistors, RFID tags, and other incorporated smart gadgets. This opens the possibility of lots of other applications, consisting of smart fabrics, smart product packaging, and smart labels.


Stabilizer residue in inks discovered to hinder conductivity in 3D printed electronics


More details:
Jing Liang et al, Printed flexible supercapacitor: Ink formula, electrode products and applications, Applied Physics Reviews (2021). DOI: 10.1063/5.0048446

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American Institute of Physics

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Printing flexible wearable electronics for smart device applications (2021, June 10)
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