Journal
NANO ENERGY
Volume 40, Issue -, Pages 224-232Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2017.08.026
Keywords
Temperature-tolerant; Reduced graphene oxide; Carbon nanotube; Hybrid film; Flexible supercapacitor
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Flexible supercapacitors have advanced rapidly in recent years and contributed to the development of wearable electronics. However, the operating temperature of the flexible supercapacitors usually falls within a narrow range, because of the constraints of the electrode materials and the electrolytes. Here, we report a flexible supercapacitor that can operate at extreme temperatures (down to -40 degrees C and up to 200 degrees C) with excellent electrochemical property and high durability. This device allows a maximum area specific capacitance of 330 mF/cm(2). It has 2 F/cm(3) volume specific capacitance and 1.7 mWh/cm(3) energy density. The high stability of this supercapacitor enables 90% capacitance retention after 105 cycles. Moreover, deformation at extreme temperature does not reduce its energy storage ability.
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