Carbon fiber-bridged polyaniline/graphene paper electrode for a highly foldable all-solid-state supercapacitor
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A simple, scalable approach is developed to fabricate a flexible hybrid paper electrode composed of the polyaniline/graphene and the carbon fiber (CF)-reinforced bacterial cellulose. The prepared hybrid paper presents high areal capacitance of 4.145 F cm−2 at 5 mA cm−2 and an extremely low sheet resistance of 29.7 Ω sq.−1. The CF endows the paper electrode remarkable foldability with no mechanical destruction. Even after being repeatedly bent 180° up to 1000 times, the initial capacitance can be retained up to 98%. A fabricated all-solid-state supercapacitor based on the resulting paper electrode has an excellent areal capacitance of 630 mF cm−2 and energy density of 2.8 mWh cm−3. The results confirm that this approach can fabricate the highly foldable and shape-tailorable energy storage devices and may have wide potential applications.
KeywordsCarbon fiber Graphene Foldable supercapacitor Polyaniline Bacterial cellulose
We are thankful to the Instrumental Analysis Center of SJTU for SEM measurements.
This study was financially supported by the National Natural Science Foundation of China (Grants No. 21576165).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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