TY - JOUR
T1 - A Shape Memory High-Voltage Supercapacitor with Asymmetric Organic Electrolytes for Driving an Integrated NO2 Gas Sensor
AU - Song, Changhoon
AU - Yun, Junyeong
AU - Lee, Hanchan
AU - Park, Heun
AU - Jeong, Yu Ra
AU - Lee, Geumbee
AU - Kim, Min Su
AU - Ha, Jeong Sook
N1 - Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/6/13
Y1 - 2019/6/13
N2 - A high-voltage supercapacitor with shape memory for driving an integrated NO2 gas sensor is fabricated using a Norland Optical Adhesive 63 polymer substrate, which can recover the original shape after deformation by short-time heating. The supercapacitor consists of multiwalled carbon nanotube electrodes and organic electrolyte. By using organic electrolyte consisting of adiponitrile, acetonitrile, and dimethyl carbonate in an optimized volume ratio of 1:1:1, a high operation voltage of 2 V is obtained. Furthermore, asymmetric electrolytes with different redox additives of hydroquinone and 1,4-dihydroxyanthraquinone to the anode and cathode, respectively, enhance both capacitance and energy density by ≈40 times compared to those of supercapacitor without redox additives. The fabricated supercapacitor on the Norland Optical Adhesive 63 polymer substrate retains 95.8% of its initial capacitance after 1000 repetitive bending cycles at a bending radius of 3.8 mm. Furthermore, the folded supercapacitor recovers its shape upon heating at 70 °C for 20 s. In addition, 90% of the initial capacitance is retained even after the 20th shape recovery from folding. The fabricated supercapacitor is used to drive integrated NO2 gas sensor on the same Norland Optical Adhesive 63 substrate attached onto skin to detect NO2 gas, regardless of deformation due to elbow movement.
AB - A high-voltage supercapacitor with shape memory for driving an integrated NO2 gas sensor is fabricated using a Norland Optical Adhesive 63 polymer substrate, which can recover the original shape after deformation by short-time heating. The supercapacitor consists of multiwalled carbon nanotube electrodes and organic electrolyte. By using organic electrolyte consisting of adiponitrile, acetonitrile, and dimethyl carbonate in an optimized volume ratio of 1:1:1, a high operation voltage of 2 V is obtained. Furthermore, asymmetric electrolytes with different redox additives of hydroquinone and 1,4-dihydroxyanthraquinone to the anode and cathode, respectively, enhance both capacitance and energy density by ≈40 times compared to those of supercapacitor without redox additives. The fabricated supercapacitor on the Norland Optical Adhesive 63 polymer substrate retains 95.8% of its initial capacitance after 1000 repetitive bending cycles at a bending radius of 3.8 mm. Furthermore, the folded supercapacitor recovers its shape upon heating at 70 °C for 20 s. In addition, 90% of the initial capacitance is retained even after the 20th shape recovery from folding. The fabricated supercapacitor is used to drive integrated NO2 gas sensor on the same Norland Optical Adhesive 63 substrate attached onto skin to detect NO2 gas, regardless of deformation due to elbow movement.
KW - 1,4-dihydroxyanthraquinone
KW - asymmetric electrolytes
KW - high-voltage supercapacitor
KW - hydroquinone
KW - shape memory
KW - wireless powering
UR - http://www.scopus.com/inward/record.url?scp=85064502708&partnerID=8YFLogxK
U2 - 10.1002/adfm.201901996
DO - 10.1002/adfm.201901996
M3 - Article
AN - SCOPUS:85064502708
SN - 1616-301X
VL - 29
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 24
M1 - 1901996
ER -