An Electric Dream Bike – With a 60 Mile Range

Signabicycle  Claiming to have developed "the most energy dense power solution for electric bicycles," SiGNa Chemistry, Inc., plans to greatly improve electric bicycles. The New York City-based company has developed a cartridge containing sodium silicide, a stable metal powder. When the powder comes in contact with water (including polluted water, sea water, and urine), it instantly produces hydrogen, and the hydrogen is then converted into electricity. According to the company, one cartridge can power a bicycle for a range of up to 60 miles without pedaling.

Compared to advanced Li-ion batteries that have an energy density of about 65 Watt-hours per kilogram, SiGNa's cartridges have an energy density of more than 1,000 Watt-hours per kilogram. The hydrogen cartridge produces up to 200 Watts of continuous power, and excess energy is stored in a Li-ion battery for climbing hills and energy-intensive acceleration. Since the fuel cells weigh just 1.5 pounds and are reusable, cyclists can easily replace them on long rides if they have more than one, eliminating the need to stop and recharge.


The hydrogen system is also safe, as the hydrogen is produced at just 50% of the pressure of a soda can. The system's only emission is water vapor, and sodium silicate, an environmentally safe byproduct of sodium silicide, is fully contained in the cartridge.

.Jason McManus via Wired.com

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