Researchers improve battery longevity for large-scale projects

11/27/2011 |

Stanford University researcher Yi Cui and his colleagues have designed a battery that maintains 83% of its charge after 40,000 cycles. The battery uses sodium or potassium ions instead of lithium. "At a rate of several cycles per day, this electrode would have a good 30 years of useful life on the electrical grid," said graduate student Colin Wessells.

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