Wood nanobattery could be green option for large-scale energy storageSubmitted by Bob-45 on Mon, 07/08/2013 - 21:08
Li-ion batteries may be ok for your smartphone, but when it comes to large-scale energy storage, the priorities suddenly shift from compactness and cycling performance (at which Li-ion batteries excel) to low cost and environmental feasibility (in which Li-ion batteries still have much room for improvement). A new "wood battery" could allow the emerging sodium-ion battery technology to fit the bill as a long-lasting, efficient and environmentally friendly battery for large-scale energy storage.
Scientists are speculating that sodium-ion batteries, currently in an early stage of development, could suit large-scale energy storage much better than Li-ion batteries, partially because sodium is cheap and plentiful and because sodium is environmentally benign. But for Na-ion batteries to become a viable energy-storage option there are still many obstacles to overcome, the greatest of which is the phenomenon known as sodiation.
With each charge/discharge cycle, the sodium ions cause the anode of the battery to swell by as much as 420 percent and then return to normal. This phenomenon, known as sodiation, can literally pulverize the anode after only 20 cycles, rendering the battery extremely short-lived. University of Maryland (UM) researchers Liangbing Hu and Teng Li found a way around this problem.