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Rate capability of polypyrrole (PPy) was improved through additional doping by oxygen containing functional groups introduced in the substrate of functionalized carbon cloth (FCC). The PPy deposited on surfaces of carbon fibers in FCC displayed good rate capability, 70% of its capacitance (341.2 mF cm−2 at 1 mA cm−2) can be retained when the charge/discharge current density increased 20 times to 20 mA cm...
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