PolyPlus Battery Company is developing the world's first commercially available rechargeable lithium-air (Li-Air) battery. Li-Air batteries are better than the Li-Ion batteries used in most EVs today because they breathe in air from the atmosphere for use as an active material in the battery, which greatly decreases its weight. Li-Air batteries also store nearly 700% as much energy as traditional Li-Ion batteries. A lighter battery would improve the range of EVs dramatically. PolyPlus is on track to making a critical breakthrough: the first manufacturable protective membrane between its lithium-based negative electrode and the reaction chamber where it reacts with oxygen from the air. This gives the battery the unique ability to recharge by moving lithium in and out of the battery's reaction chamber for storage until the battery needs to discharge once again. Until now, engineers had been unable to create the complex packaging and air-breathing components required to turn Li-Air batteries into rechargeable systems.
If successful, PolyPlus' project would enable EVs to travel 500 miles on a single charge, much further than today's EVs or gasoline-powered cars can go.
Increased use of EVs would decrease U.S. dependence on foreign oil—the transportation sector is the dominant source of this dependence.
Greater use of EVs would reduce greenhouse gas emissions, 28% of which come from the transportation sector.
This battery would enable an EV to travel from New York City to Raleigh, NC (500 miles) on a single charge, for less than $10 on average.