Porous Graphene-Carbon Nanotube Scaffolds for Fiber Supercapacitors

• DOI: 10.1021/acsami.8b17908
• Publication Date: 2019-01-17T17:16:41Z
• Authors: Hun Park; Rohan B. Ambade; Sung Hyun Noh; Wonsik Eom; Ki Hwan Koh; Swapnil B. Ambade; Won Jun Lee; Seong Hun Kim; Tae Hee Han
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Fiber nanomaterials can become fundamental devices that be woven into smart textiles, for example, miniaturized fiber-based supercapacitors (FSCs). They utilized portable, wearable electronics and energy storage devices, which are highly prospective areas of research in the future. Herein, we developed porous carbon nanotube–graphene hybrid fibers (CNT–GFs) all-solid-state symmetric FSCs, were assembled through wet-spinning followed by a hydrothermal activation process using environmentally benign chemicals (i.e., H2O2 NH4OH deionized water). The barriers limited effective ion accessibility GFs overcome intercalation CNTs enhanced their electrical conductivity mechanical properties as well. FSCs precisely controlled activated fiber (a-CNT–GF) electrode exhibited an volumetric capacitance 60.75 F cm–3 compared with those pristine CNT–GF (19.80 cm–3). also showed density (4.83 mWh cm–3) roughly 3 times higher than untreated CNT–GFs (1.50 excellent flexibility structural stability a-CNT–GF highlighted demonstration negligible differences upon bending twisting. mechanism developing porous, large-scale, low-cost electrodes method presented this work provides promising route designing new generation wearable, portable devices.