Though the obstacles to a clean energy economy are largely political, one particular technological challenge to this goal is the expense and capacity of storage batteries. The sun may shine strongly on a home rooftop, but if there is nowhere to store this energy until peak-demand in the evening, the system is not effective. However, technology may be catching up to demand. While the Tesla Powerwall hopes to be part of the solution, a new method of manufacturing lithium batteries, pioneered by MIT researchers and Cambridge-based company 24M, may cut production costs in half and open up enormous opportunities for renewable energy.
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