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Are Lithium-Ion Batteries Reaching the Point of Diminishing Returns?

A soon-to-be-released study from a supercapacitor manufacturer claims lithium-ion batteries could be reaching their physical energy density limits, calling their future usefulness into question. Using a “first-principles analysis,” Wolfgang Mack, vice president of business development at Menlo Park-based Capacitor Sciences, argues lithium-ion technology has reached 87 percent of its commercially achievable cell limit for energy density.
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