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(a) A schematic diagram of the spray deposition arrangement used to fabricate solid-state supercapacitors; (b) a solid-state supercapacitor cell comprising a Nafion membrane covered with spray deposited MWNT-based electrodes; (c) a schematic diagram of a membrane-based all-solid-state supercapacitor; and (d) a schematic diagram of a simple “stack” of three all-solid-state supercapacitor cells.
