Increasing demand for green energy storage systems, arising from the rapid development of portable electronics, has triggered tremendous research efforts for designing new or high-performance electrodes.
An asymmetric supercapacitor fabricated using onion-like nanoporous CuCo2O4 hollow spheres exhibits an energy density of 48.75 W h kg−1 and a power density of 37.5 kW kg−1, which can compete with Ni–MH batteries.
Multilevel interior nanoporous CuCoO microspheres have been for the first time developed using a facile self-templated method. Electrochemical results in three- and two-electrode systems show that the double-shelled hollow microsphere electrode is a promising candidate for high-performance supercapacitors.
Hierarchical multi-shelled nanoporous mixed copper cobalt phosphide microspheres have been for the first time developed as a novel advanced electrode with superior electrochemical properties.
electrochemical sensors are the tools to detect the accurate and sensitive miRs. there is the challenge to increase the power and sensitivity of the surface for the electrochemical sensor. We design a viruslike hallow structure of cuco 2 o 4 that it holds the large amounts of p19 protein by mimicking of inherent virus (Carnation italian ringspot virus) to detect 21mir with the limit of detection (LOD = 1aM). The electrochemical measurements are performed between the potentials at −0.3 V and +0.3 V with 1 mM [fe(cn) 6 ] −3/−4. After dropping the cuco 2 o 4 on the Scpe (screen carbon printed electrode), the sensor is turned on due to the high electrochemical properties. Then, p19 proteins move into the hallow structure and inhibit the exchange of electrochemical reactions between the shells and the sensor is turned off. Then, adding the duplexes of RNA/miRs cause to increase the electrochemical property of p19 due to the change of p19 conformation and the system is turned on, again. So, for the first time, a virus-like hallow structure has been used to detect the 21miR in the human serum, MCF-7, Hella cells, with high sensitivity, specificity, and reproducibility in few minutes.
This study successfully synthesized highly porous hollow
nano sword-like
CuCo2O4 with a large specific surface area (80.2
m2 g–1) on a nickel foam substrate through
a simple solution-based method followed by a calcination process.
Benefiting from their geometrical merits, including excellent structural
robustness, large electroactive surface areas, and 3D open structures,
the hollow nano sword arrays of CuCo2O4 deliver
remarkable electrochemical performances for SCs. Using this binder-free
strategy, the synthesized copper cobalt oxide electrode delivers a
great specific capacity of 717 C g–1 at 1 A g–1 with an excellent rate capability and cycling stability
in a three-electrode cell configuration. Consequently, the fabricated
CCO-HS//AC device exhibits the highest specific energy of 54 Wh kg–1 at a specific power of 3137 W kg–1 with a remarkable cycle stability of 91.1% capacity retention after
8000 cycles, indicating its potential as a novel electrode for energy
storage systems.
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