Scientists have been figuring out how to develop eco-friendly ways of recharging batteries for years, from harvesting temperature fluctuations to harnessing your fidgets. But perhaps a better solution is to create a different kind of battery altogether; one that uses greener sources instead of finite ingredients like cobalt. That's exactly what the whiz-kids from the City College of New York, Rice University and the US Army Research Laboratory have done with a new lithium-ion batter
