Via KeelyNet.com: Research by a German team could aid the superconductor industry by improving capacitance by an order of magnitude compared to current approaches. The researchers identified the improvement when using a "hybrid mix" of potassium ferricyanide in aqueous media.
In a paper
titled "High-Performance Hybrid Energy Storage with Potassium
Ferricyanide Redox Electrolyte," the team from the Leibniz Institute for
New Materials (INM) in Saarbrücken also described how they overcame
current leakage with an ion-exchange membrane.
The team, led by Professor Volker Presser of INM’s Energy Materials
program division, found the hybrid medium had an energy capacity of 28.3
watt-hours per kilogram, or 11.4 watt-hours per liter.
This nears the 30-watt-hours-per-kilogram upper limit for current
supercapacitor products and is “higher compared to the same cell
operated in aqueous sodium sulfate,” said the team.
The researchers also noted “excellent long-term stability” across
10,000 charge and discharge cycles. “This hybrid electrochemical energy
storage system is believed to find a strong foothold in future advanced
energy storage applications,” concluded the study’s authors...
Full story: http://www.greentechmedia.com/articles/read/new-research-promises-superconductor-breakthrough