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Ioxus lands $21 million investment from venture arms of large energy and transportation companies, which are evaluating ultracapacitors for a broader set of energy storage applications.
Maxwell Technologies will use the money to develop a long-lasting portable energy-storage device for soldiers to charge and manage electronics in the field.
Energy storage company Ioxus designs a hybrid gadget that combines the fast recharge of ultracapacitors with the greater energy storage of lithium-ion batteries.
General Electric plans to buy 25,000 electric vehicles by 2015 to convert its own fleet and drive demand for EV infrastructure.
Batteries get all the attention when it comes to electric vehicles and grid storage, but ultracapacitor companies say the bursts of power they provide can play a role.