This was the topic of a recent roundtable discussion held by The Kavli Foundation with Seth Fletcher, Senior Editor at Popular Science, and two researchers in the field 鈥� Clare Grey at the University of Cambridge and Jeff Sakamoto at Michigan State University.
According to Fletcher, the dynamics for innovation are falling into place. 鈥淎 few years ago there were essentially no electric cars on the road in the United States,鈥� said Fletcher, who is also the author of 鈥淏ottled Lightning: Superbatteries, Electric Cars, and the New Lithium Economy." 鈥淣ow there are several thousand that people actually own, which is completely different than in the 1990s when people were leasing EV1s. Think about it: GM leased 800 EV1s over the course of three years. Last year alone, GM sold nearly 8,000 Volts.鈥�
Better battery technology for powering these vehicles also looks promising. 鈥淭here is much good work going on,鈥� according to Jeff Sakamoto, Assistant Professor in Michigan State University's Department of Chemical Engineering and Materials Science. 鈥淪ome of it is focused on exploring new battery configurations and chemistries. One, referred to as a 'solid state' battery, uses a solid ceramic electrolyte that can replace current, flammable liquid electrolytes. Other potentially interesting though challenging areas include research on lithium-air batteries. Researchers are also exploring how different electrode materials, particularly silicon, might be used to improve battery performance.鈥�
Another innovative direction is redox flow batteries. 鈥淏asically, these batteries pump an electrolyte solution or powder in and out of the battery,鈥� said Clare Grey, Professor in the University of Cambridge鈥檚 Department of Chemistry. 鈥淢ost batteries today are closed, sealed systems, so you鈥檙e limited to the electrons you have in a contained space. Flow batteries get rid of that limitation鈥nd more electrons out means cars with longer ranges.鈥�
In 2011, Grey received The Royal Society鈥檚 Kavli Medal and Lecture for work that included groundbreaking in situ studies on batteries and fuel cells. Grey recently noted that not only the technology is promising; incentives are changing in countries like the United Kingdom so the industry itself is invested in the success of these cars. 鈥淸In Europe,] emissions are regulated across each manufacturer鈥檚 fleet of vehicles. So as a result, BMW and Mercedes鈥� are really pushing their electric and hybrid vehicle programs to reduce their fleets鈥� overall emissions. 鈥nd the good thing is, people are buying these cars. At the high-end of the market, it seems, people don鈥檛 mind paying a bit extra for electric or hybrid vehicles. In the most optimistic scenario that demand will eventually trickle down into the lower-end markets as well."
For the complete discussion, visit:
RSS