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Carbon nanotube/graphene (CNT/G) composite sponge is prepared by in-situ partially unzipping of CNT sponge. Polypyrrole is then electro-polymerized onto the sponge to form CNT/graphene/polypyrrole (CNT/G/PPy) ternary composite sponge. The capacitive behavior of the composite is investigated by using cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy. The...
A carbon nanotube (CNT) sponge contains a three-dimensional conductive nanotube network, and can be used as a porous electrode for various energy devices. We present here a rational strategy to fabricate a unique CNT@polypyrrole (PPy) core-shell sponge, and demonstrate its application as a highly compressible supercapacitor electrode with high performance. A PPy layer with optimal thickness was coated...
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