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Nowadays, as a novel concept, wearable electronics have attracted great attention in both scientific and industrial areas.Yam supercapacitors are key components for wearable electronics due to their high power density and cycle stability.Carbon nanotubes (CNTs) are regard as ideal electrode materials for wearable electronics, researchers have made significant efforts to synthesize CNTs yarns.However, the capacitance of CNTs based supercapacitors is not high enough for application.