Supercapacitors News

Perpetuus Carbon Group teams up with G24 Power to produce advanced graphene-enabled components

The UK based Perpetuus Carbon, producer and global supplier of high quality functionalized graphene, signed a preliminary agreement to achieve full commercial partnership and manufacturing agreement with G24 Power, a leading dye sensitized solar cell (DSSC) company from the UK.

Perpetuus is to provide functionalized graphene, in sheet or roll form, for G24’s production of a range of advanced graphene-enabled components. G24 reportedly has manufacturing capabilities of thousands of metres of components per month for use in areas like resistance heating, biosensor platforms, barrier packaging, composite physical reinforcements, water treatment, fuel cell membranes, thermal management and heat dissipation, EMI shielding, electrodes for batteries and supercapacitors and LI-AIR battery cathodes.

Graphene and CNT-based supercapacitors to be integrated into the doors of your car

Researchers from Rice University and Queensland University of Technology (QUT) have developed a lightweight supercapacitor that can be combined with regular batteries to boost the power of an electric car.

This supercapacitor is made of graphene films as the electrodes and carbon nanotube films as current collectors, resulting in a device that demonstrates energy densities of 8-14 watt-hours per kilogram, and power densities of 250-450 kilowatts per kilogram. 

Graphene supercapacitor charger initiative by Zapgocharger

The Oxford-based startup Zapgocharger Ltd has recently gone public with a crowdfunding initiative to raise money for the development and production of the Zap&Go portable charger for phones and tablets. The charger is meant to sport a graphene supercapacitor which will enable on-the-go charging of the device after plugging the charger into a specialized power supply for just 5 minutes (the charger will reportedly be able to take a 1,500mAh charge).

At the time this post was written, the company has already reached (more than doubled, actually!) their $30,000 goal. The Zap&Go charger’s launching price will reportedly be $150, but it is now offered at $99. Estimated delivery, as per the company, is October 2015.

Graphene aerogels are promising for supercapacitor electrodes

Researchers from Lawrence Livermore (LLNL) developed new supercapacitor electrodes made from modified graphene aerogels. Those electrodes feature high surface area, good electrical conductivity, chemical inertness and long-term cycling stability.

The researchers report that the graphene aerogel can improve the performance of commercial carbon-based (carbon black and binder materials) supercapacitor electrodes by more than 100%. The graphene aerogel electrodes have better density and pore size distribution, and increased conductivity.

Crumpled graphene paper enables foldable and stretchable supercapacitors

MIT researchers discovered the crumpling graphene paper (made from graphene sheets bonded together) results in a low-cost material that is very useful for extremely stretchable supercapacitors for flexible devices.

Crumpling the graphene paper results in a "chaotic mass of folds. The researchers developed a simple supercapacitor using this material, that can easily be bent, folded, or stretched to as much as 800% of its original size. The material can be crumpled and flattened up to a 1,000 times, without a significant loss of performance.

Used cigarette filters turned into supercapacitor electrodes that outperform graphene-based ones

Researchers from Seoul National University developed a one-step method to prepare a carbon material (which they call NCF) from used cigarette filters. They used the NCF to create supercapacitor electrodes - which exhibit a better rate capability and higher specific capacitance compared to conventional activated carbon. The capacitance is actually higher than N-doped graphene or N-doped CNT electrodes.

NCF is a nitrogen doped (N-doped) meso-/microporous hybrid carbon material. It is prepared via heating the filters in a nitrogen-containing atmosphere. The filters are made from mostly cellulose acetate fibers, which transform to mesopores and micropores which self-assemble into a unique pore structure.

Graphene Oxide and hBN used to create tough ultralight foam material

Researchers from Rice University developed a new chemical process that is used to create a tough, ultra-light foam in any size and shape. The new foam (called GO-0.5BN) is made from two 2D materials: graphene oxide and hexagonal boron nitride (hBN) platelets.

This foam can be used as structural component in applications such as electrodes for supercapacitors and batteries and gas absorption material.

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