Wood battery could be the future of large energy storage

As we look toward a future of more renewable energy being fed into the grid, having reliable energy storage to back up intermittent wind and solar will be necessary for everything to run smoothly. That's why researchers have been working hard to find the best type of battery for this type of large-scale storage. Lithium-ion batteries are great for gadgets and even cars, but on a larger scale they're too expensive and aren't very environmentally friendly. Many researchers believe sodium-ion batteries are the answer. Sodium is cheap and environmentally benign and sodium-ion batteries would...