This battery actually has promising performance compared to non-flexible batteries - higher energy density, power density and better cycle life. The team now works on extending the performance using solid-state or polymer electrolyte. They also believe that this technology can be used not just in batteries but also in solar cells, OLED displays and catalysis.
http://www.graphene-info.com/researchers-develop-graphene-based-high-performance-bendable-battery
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