File talk:Supercapacitors-vs-batteries-chart.png
There is a problem with this chart, how can supercapacitors have more energy density than lithium ion batteries? Also the text in the article says that commercial supercapacitors store between 0.5-15 Wh/kg. But the chart indicates that they have above 100Wh/kg.
"As of 2013 commercial specific energies range from around 0.5 to 15 Wh/kg. For comparison, an aluminum electrolytic capacitor stores typically 0.01 to 0.3 Wh/kg, while a conventional lead-acid battery stores typically 30 to 40 Wh/kg and modern lithium-ion batteries 100 to 265 Wh/kg. Supercapacitors can therefore store 10 to 100 times more energy than electrolytic capacitors, but only one tenth as much as batteries.[citation needed] For reference, petrol fuel has a specific energy of 44.4 MJ/kg or 12300 Wh/kg (in vehicle propulsion, the efficiency of energy conversions should be considered resulting in 3700 Wh/kg considering a typical 30% internal combustion engine efficiency)."
What gives?
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