Abstract
The proliferation of wearable and portable electronics requires high-performance power sources that are lightweight, ultrathin, flexible and low cost in addition to high performance features. Here, a new type of flexible Ni/Fe cell is designed and fabricated by employing Ni(OH)2 nanosheets and porous Fe2O3 nanorods grown on lightweight and flexible graphene foam (GF)/carbon nanotubes (CNTs) hybrid films as electrodes. These novel flexible Ni/Fe cells deliver superior energy and power densities stemming from the nanosized feature of active materials and the hierarchical structure of the electrodes. Stable capacities on repeated bending and long-term (up to 1000) cycling are also demonstrated.
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