Researchers at the University of California, Irvine have made a battery that is almost unchanged after 200,000 charge-discharge cycles over three months. It exploits the high surface area of gold nano-wires coated with manganese dioxide, into which lithium ions are added and removed. The cells are symmetrical, with identical nano-wires attached to both electrodes, separated ...
from ElectronicsWeekly http://www.electronicsweekly.com/news/research-news/battery-lasts-200000-cycles-2016-05/
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