MIT scientists find the key to faster, longer-lasting batteries

MIT scientists find the key to faster, longer-lasting batteries

Why your phone charges quickly one day but slowly the next, or why electric cars still take an hour or more to charge, is a matter of how lithium ions move into a battery’s electrodes. Scientists thought for decades they’d cracked it, but the numbers never worked out. Now, researchers at MIT say they’ve cracked the puzzle with a fresh way of thinking about how electrons and ions move together—a breakthrough that has potential to create safer, fa…