Graphene ultracapacitor claims market’s highest energy density

Graphene ultracapacitor claims market’s highest energy density

Technology News |
By eeNews Europe

By contrast, the closest competitor product has a capacitance of 3400 farads. This is the single biggest increase in energy density for ultracapacitors in the past 15 years.

Energy density is a key development challenge for the ultracapacitor market and is fundamental if the technology is to eventually replace battery storage. The record-
breaking energy density achieved by the SkelCap 4500 series will allow Skeleton Technologies to maximise opportunities in the heavy transportation and industrial
markets where weight and space are at a premium.

“Graphene has long been heralded as a wonder material for a range of applications, including energy storage. However, a mass-market, graphene-based product has been slow to materialise. Our ultracapacitors will be that market breakthrough,” explained Skeleton Technologies’ CEO, Taavi Madiberk. “We are harnessing the power of graphene to make the most significant advances in ultracapacitor performance seen for several years and this is resulting in strong
customer demand ranging from aerospace to automotive applications.”

Skeleton Technologies ultracapacitors have already been chosen by the European Space Agency, where their use is expected to lead to significant cost savings by
reducing the volume of heavy batteries required for energy storage. Next month, the company will be announcing the first ultracapacitor product for the hybrid truck

The range of ultracapacitors has been designed for mass-market applications and the needs of systems engineers. The format has been developed to meet the industry standard of a 60 mm diameter cylindrical cell. Skeleton Technologies had previously offered prismatic cells, which are more compact in modular arrangements but more expensive to produce.

Skeleton Technologies has also achieved one the lowest ESR (equivalent series resistance) levels on the market at 0.095 mΩ. This factor is crucial as it greatly
increases the efficiency of the cells by reducing the amount of energy that is lost as heat. For example, if a 3900 A current is run through the SkelCap 4500 cell, it
will lose only 0.30 joules per farad, whereas competing products can lose as much as 1.00 joules per farad.

“The ultracapacitor market is dominated by organic precursor carbon from coconut shell. It is the successful development of a graphene-based carbon that is allowing us to set new records for product performance,” said Volker Dudek, Chief Technology Officer at Skeleton Technologies. “We have set ourselves an ambitious technology development target of 20 Wh/kg by 2020, which is comparable with battery level energy density. With the launch of the SkelCap 4500 range we are already half way towards that goal.”

In the last month, Skeleton Technologies secured 9.8 million euros in Series B financing with a strategic investor in the electrical equipment market to ramp up the
deployment of their graphene ultracapacitors.

Related articles and links:

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Estonian graphene ultracapacitor pioneer receives 9.8m euros injection

European Space Agency to send ultracapacitors into orbit

Mixture of graphene/carbon nanotubes produce low-cost ultracapacitors

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