Scientists have created a powerful micro-supercapacitor, just nanometres thick, that could help electronics companies develop mobile phones and cameras that are smaller, lighter and thinner than ever before.
The tiny power supply measures less than half a centimetre across and is made from a flexible material, opening up the possibility for wearable electronics.
The research is published in the Royal Society of Chemistry journal Energy & Environmental Science.
A bottleneck in making portable electronic devices like mobile phones even smaller is reducing the size and increasing the flexibility of the power supplies in electronic circuits. Supercapacitors are attractive power supplies because they can store almost as much energy as a battery, with the advantage of high-speed energy discharge. Supercapacitor electrodes are normally made from carbon or conducting polymers, but these can be relatively costly.
A team led by Professor Oliver G Schmidt at the Leibniz Institute for Solid State and Materials Research in Dresden (IFW-Dresden) examined the use of manganese dioxide as an alternative electrode material, which is more environmentally friendly and less expensive than the standard materials. Manganese dioxide is not a natural choice for an electrode material because it isn’t very electrically conductive, nor is it naturally flexible or strong. However, the scientists overcame this by vaporising the manganese dioxide using an electron beam and then allowing the gaseous atoms to precipitate into thin, bendy films. They incorporated very thin layers of gold into the films to improve the electrical conductivity of the material.
Tests on the new micro-supercapacitor showed that the tiny, bendy power supply can store more energy and provide more power per unit volume than state-of-the-art supercapacitors.
Dr Chenglin Yan, leader of the research group at IFW-Dresden, said: “Supercapacitors, as a new class of energy device, can store high energy and provide high power, bridging the gap between rechargeable batteries and conventional capacitors. So we thought a micro-supercapacitor would be an important development in the rapid advance of portable consumer electronics, which need small lightweight, flexible micro-scale power sources.
“The device could be applied to many miniaturised technologies, including implantable medical devices and active radio frequency identification (RFID) tags for self-powered miniaturised devices.”
The Latest on: Micro-supercapacitor
- Ionic pins hopes on alternative to lithium-ion batteries on July 23, 2017 at 7:05 am
The push for a better battery is continuing in Melbourne, with unlisted technology company Ionic Industries working on a way to commercially produce graphene supercapacitors as a safer, quicker charging alternative to lithium-ion batteries. Ionic ... […]
- Stretchy supercapacitors power wearable electronics on August 23, 2016 at 7:38 am
In a step toward wearable electronics, a team of researchers has produced a stretchy micro-supercapacitor using ribbons of graphene. The researchers will present their work today at the 252nd National Meeting & Exposition of the American Chemical Society ... […]
- New Graphene + Carbon Nanotube Supercapacitor Rivals Lithium Battery on May 12, 2014 at 10:07 pm
The favorable comparison to lithium was demonstrated in a solid state micro-supercapacitor, which the research team assembled from two graphene/carbon nanotube fibers. With a polyvinyl alcohol/phosphoric acid gel as an electrolyte, the device achieved a ... […]
- Soon, shirts to power wearable devices? on May 12, 2014 at 3:30 am
Using a polyvinyl alcohol /phosphoric acid gel as an electrolyte, a solid-state micro-supercapacitor made from a pair of fibers offered a volumetric density of 6.3 microwatt hours per cubic millimetre, which is comparable to that of a 4-volt-500 ... […]
- Soon, phones and cameras that can be bent, worn on August 8, 2013 at 11:09 pm
BERLIN: Scientists have created a powerful micro-supercapacitor , just nanometres thick, that could open up the possibility for wearable and flexible electronics. The tiny power supply measures less than half a centimetre across and is made from a flexible ... […]
- TLM-PSD model for optimization of energy and power density of vertically aligned carbon nanotube supercapacitor on July 11, 2013 at 5:00 pm
The powerfulness of the model was confirmed by comparing with experimental results of a micro-supercapacitor consisted of vertically aligned multiwalled carbon nanotubes (v-MWCNTs), which revealed a linear current increase up to 600 Vs −1 scan rate ... […]
- The Battery Life of the Future on March 28, 2013 at 5:31 am
The team created a one-atom thick micro-supercapacitor using a sheet of graphene and a LightScribe DVD burner. This means, not only does it provide a method of rapidly charging consumer electronics, it can be easily manufactured, is extremely small and ... […]
- The battery breakthrough that could charge your iPhone in five SECONDS on March 1, 2013 at 5:40 am
To develop their new micro-supercapacitor, the researchers used a two-dimensional sheet of carbon, known as graphene, which only has the thickness of a single atom in the third dimension. The team also found a way to produce the new batteries easily ... […]
via Google News and Bing News