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Realization of high performance flexible wire supercapacitors based on 3-dimensional NiCo<sub>2</sub>O<sub>4</sub>/Ni fibers

Realization of high performance flexible wire supercapacitors based on 3-dimensional NiCo2O4/Ni fibers

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RAMADOSS, Ananthakumar, Kyeong-Nam KANG, Hyo-Jin AHN, Sun-I KIM, Seung-Tak RYU, Ji-Hyun JANG, 2016. Realization of high performance flexible wire supercapacitors based on 3-dimensional NiCo2O4/Ni fibers. In: Journal of Materials Chemistry A. 4(13), pp. 4718-4727. ISSN 2050-7488. eISSN 2050-7496

@article{Ramadoss2016Reali-37040, title={Realization of high performance flexible wire supercapacitors based on 3-dimensional NiCo2O4/Ni fibers}, year={2016}, doi={10.1039/C5TA10781D}, number={13}, volume={4}, issn={2050-7488}, journal={Journal of Materials Chemistry A}, pages={4718--4727}, author={Ramadoss, Ananthakumar and Kang, Kyeong-Nam and Ahn, Hyo-Jin and Kim, Sun-I and Ryu, Seung-Tak and Jang, Ji-Hyun} }

Kang, Kyeong-Nam Kim, Sun-I The rapidly developing electronics industry is producing miniaturized electronic devices with flexible, portable and wearable characteristics, requiring high-performance miniature energy storage devices with flexible and light weight properties. Herein, we have successfully fabricated highly porous, binder free three-dimensional flower-like NiCo<sub>2</sub>O<sub>4</sub>/Ni nanostructures on Ni-wire as a fiber electrode for high-performance flexible fiber supercapacitors. Such a unique structure exhibited remarkable electrochemical performance with high capacitance (29.7 F cm<sup>−3</sup> at 2.5 mA), excellent rate capability (97.5% retention at 20 mA), and super cycling stability (80% retention, even after 5000 cycles). The remarkable electrochemical performance is attributed to the large active area in the 3D porous architecture and direct contact between the active materials and 3D-Ni current collectors, which facilitate easy ionic/electronic transport. The symmetric fiber supercapacitor showed a gravimetric energy density of 2.18 W h kg<sup>−1</sup> (0.21 mW h cm<sup>−3</sup>) and a power density of 21.6 W kg<sup>−1</sup> (2.1 mW cm<sup>−3</sup>) with good flexibility and cycling performance, signifying potential applications in high-performance flexible energy storage devices. Further, performance in a self-powered system was demonstrated by charging these wire type NiCo<sub>2</sub>O<sub>4</sub>/Ni supercapacitors by serially wound DSSCs to drive commercial LEDs. These results suggest that the fabricated device has excellent potential as a power source for flexible, portable and wearable applications as well as self-powered systems. Kang, Kyeong-Nam Kim, Sun-I eng Jang, Ji-Hyun Ryu, Seung-Tak Ryu, Seung-Tak Realization of high performance flexible wire supercapacitors based on 3-dimensional NiCo<sub>2</sub>O<sub>4</sub>/Ni fibers Ramadoss, Ananthakumar Ahn, Hyo-Jin Ramadoss, Ananthakumar 2016 2017-02-01T08:18:06Z 2017-02-01T08:18:06Z Ahn, Hyo-Jin Jang, Ji-Hyun

Dateiabrufe seit 01.02.2017 (Informationen über die Zugriffsstatistik)

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