Graphene electrode could lead to ‘ultimate’ battery - Materials Today
British scientists have developed a working laboratory demonstrator of a lithium-oxygen battery that has very high energy density, is more than 90% efficient, and, to date, can be recharged more than 2000 times.
Lithium-oxygen, or lithium-air, batteries have been touted as the 'ultimate' battery due to their theoretical energy density, which is 10 times that of a conventional lithium-ion (Li-ion) battery. Such a high energy density would be comparable to that of gasoline, allowing an electric car with a battery that is a fifth of the cost and a fifth of the weight of those currently on the market to drive from London to Edinburgh on a single charge.