Wearable Solid-State Supercapacitors Operating at High Working Voltage with a Flexible Nanocomposite Electrode.
The proposed approach for fabricating ultralight self-sustained electrodes facilitates the structural integration of highly flexible carbon nanofibers, amino-modified multiwalled carbon nanotubes (AM-MWNT), and MnO2nanoflakes for potential use in wearable supercapacitors. Because of the higher orientation of AM-MWNT and the sublimation of terephthalic acid (PTA) in the carbonization process, freestanding electrodes could be realized with high porosity and flexibility and could possess remarkable electrochemical properties without using polymer substrates. Wearable symmetric solid-state supercapacitors were further assembled using a LiCl/PVA gel electrolyte, which exhibit a maximum energy density of 44.57 Wh/kg (at a power density of 337.1 W/kg) and a power density of 13330 W/kg (at an energy density of 19.64 Wh/kg) with a working voltage as high as 1.8 V. Due to the combination of several favorable traits such as flexibility, high energy density, and excellent electrochemical cyclability, the presently developed wearable supercapacitors with wide potential windows are expected to be useful for new kinds of portable electric devices.
College of Chemistry, Chemical Engineering and Biotechnology, and Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University , Shanghai 201620, P.R. China.|Materials Research Institute, Materials Research Laboratory, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
Xiaoyan
X
Li
College of Chemistry, Chemical Engineering and Biotechnology, and Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University , Shanghai 201620, P.R. China.
Jun
J
Wang
College of Chemistry, Chemical Engineering and Biotechnology, and Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University , Shanghai 201620, P.R. China.
Yaping
Y
Zhao
College of Chemistry, Chemical Engineering and Biotechnology, and Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University , Shanghai 201620, P.R. China.
Fengyan
F
Ge
Materials Research Institute, Materials Research Laboratory, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
Sridhar
S
Komarneni
College of Chemistry, Chemical Engineering and Biotechnology, and Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University , Shanghai 201620, P.R. China.
Zaisheng
Z
Cai
MnO2 nanoflakes; amino-modified multiwalled carbon nanotube; carbon nanofiber; freestanding electrode; high working voltage; wearable solid-state supercapacitor