Mulberry Paper‐Based Supercapacitor Exhibiting High Mechanical and Chemical Toughness for Large‐Scale Energy Storage Applications |
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Authors: | Tae Gwang Yun Donghyuk Kim Sang‐Min Kim Il‐Doo Kim Seungmin Hyun Seung Min Han |
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Affiliation: | 1. Graduate School of EEWS, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea;2. Department of Material Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea;3. Department of Applied Nano Mechanics, Korea Institute of Machinery and Materials, Daejeon, Republic of Korea |
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Abstract: | In response to the demand for flexible and sustainable energy storage devices that exhibit high electrochemical performance, a supercapacitor system is fabricated using mulberry tree‐derived paper as a substrate and Poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS) and carbon black as the active material. The mulberry paper‐based supercapacitor system demonstrates high energy density of 29.8–39.8 Wh kg?1 and power density of 2.8–13.9 kW kg?1 with 90.7% retention of its initial capacity over 15 000 charge–discharge cycles. In addition, the mulberry tree fibers are known to have superior mechanical strength and toughness and the mulberry paper‐based supercapacitor; as a result, exhibit high mechanical and chemical toughness; 99% of its initial capacity is retained after 100 repeated applications of bending strains, and twisting. 94% capacity retention is observed even after exposure to HCl and H2SO4 acid solutions. The fabrication methodology of the mulberry‐based supercapacitor is highly scalable and could be stacked to increase the energy storage capacity, where operation of light‐emitting diode lights with a drive voltage of 12 V integrated in a wearable device is demonstrated. |
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Keywords: | carbon black large‐scale energy storage mechanical– chemical toughness mulberry paper PEDOT:PSS |
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