1. Oriented CuCo2S4 nanograss arrays/Ni foam as an electrode for a high-performance all-solid-state supercapacitor.
- Author
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Yuqiao Wang, Dawei Yang, Tianyue Zhou, Jie Pan, Tao Wei, and Yueming Sun
- Subjects
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COPPER compounds , *NANOCRYSTALS , *SUPERCAPACITORS - Abstract
An oriented nanograss array consisting of CuCo2S4 nanocrystallines was directly prepared on Ni foam by a hydrothermal method. The uniform arrays with a single blade diameter of ∼100 nm and length of ∼4 μm can grow tightly on Ni foam without any binders. The ordered one-dimensional structure facilitates the electron transport to Ni substrates along the axial direction. The electrochemical properties were presented in three- and two-electrode configurations, demonstrating an enhanced specific capacitance and a long-term cycling stability. As a practical all-solid-state device, it achieved a high energy density of 31.88 W h kg−1 at a power density of 3.20 kW kg−1. Even at a higher power density of 15.23 W h kg−1, the device still had an energy density of 16.5 kW kg−1. After 5000 cycles, the retention ratio was higher than 99% at high current density of 11.36 A g−1. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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