Marigold flower like structured Cu2NiSnS4 electrode for high energy asymmetric solid state supercapacitors

Abstract

The growth in energy devices and the role of supercapacitors are increasingly important in today’s world. Designing an electrode material for supercapacitors using metals that have high performance, superior structure, are eco-friendly, inexpensive and highly abundant is essentially required for commercialization. In this point of view, quaternary chalcogenide Cu2NiSnS4 with fascinating marigold flower like microstructured electrodes are synthesized using different concentrations of citric acid (0, 0.05 M, 0.1 M and 0.2 M) by employing solvothermal method. The electrode materials physicochemical characteristics are deliberated in detail using the basic characterization techniques. The electrochemical studies revealed better electrochemical performances, in particular, Cu2NiSnS4@0.1 M-CA electrode revealed high 1029 F/g specific capacitance at 0.5 A/g current density. Further, it retained 78.65% capacity over 5000 cycles. To prove the practical applicability, a full-cell asymmetric solid-state device is fabricated, and it delivered 41.25 Wh/Kg and 750 Wh/Kg energy and power density at 0.5 A/g. The optimum citric acid added Cu2NiSnS4 electrode is shown to be a promising candidate for supercapacitor applications.

Quaternary Cu2FeSnS4/PVP/rGO Composite for Supercapacitor Applications

“…For example, various alloys, metal nitrides, metal oxides, and sulfides have been used for supercapacitor use. 10 , 15 Generally, NiO, SnO, MnO 2 , RuO 2 , V 2 O 5 , and Co 3 O 4 and their composites are used as electrode materials. 11 , 12 So far, RuO 2 has been reported as the best electrode material that can provide good performances due to its excellent theoretical specific capacity (1400–2000 F/g).…”

Hydrothermal Synthesis of Flexible Fe‐Doped Polyaniline/Dye‐Functionalized Carbon Felt Electrode for Supercapacitor Applications

“…This was largely due to the LGB molecules, which reduced the swelling of the PANI while charging. The redox sites in the polymer backbone did not survive during swelling‐shrinking over many cycles [73] …”

“…The gravimetric specific capacitances decreased from 458 to 77 F g −1 (areal capacitance 2749 and 495 mF.cm −2 ) as the scan rates range from 5–100 mV.s −1 . The specific capacitance values of the device decreased with the increased scan rate because the electrolyte ion diffusion rate or redox reaction could not match with the rapid increase in scan rates [73] …”

“…The specific capacitance values of the device decreased with the increased scan rate because the electrolyte ion diffusion rate or redox reaction could not match with the rapid increase in scan rates. [73]…”

“…The redox sites in the polymer backbone did not survive during swellingshrinking over many cycles. [73] The Nyquist plot CFt/Fe-PANI/LGB(3 mM) //CFt/Fe-PANI/ LGB(3 mM) within a frequency range of 0.1 Hz to 10 kHz was shown in Figure 9e. The proper equivalent circuit model which was shown in the inset of Figure 8c was used to fit for EIS measurement.…”