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Achieving a satisfactory energy–power combination in a supercapacitor that is based on all-carbon electrodes and operates in benign aqueous media instead of conventional organic electrolytes is a major challenge. For this purpose, we fabricated carbon nanoflakes (20–100 nm in thickness, 5-μm in width) containing an unparalleled combination of a large surface area (3,000 m2·g−1 range) and mesoporosity...
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