Sustainable carbon coated ZrO₂ electrodes with high capacitance retention for energy storage devices

Abstract

The rapid development of modern technology starves for future research to attain high-energy, high-power, and high cyclic stable energy-storage devices. Carbonaceous electrodes in supercapacitors provide a large-power device, which stores the charge between the surface of the carbonaceous electrode and the electrolyte layer. The commercially available electrode based on pure carbon suffers from low energy density. To overcome the mentioned issue major efforts have been dedicated to enhancing the charge storage of carbonaceous electrodes by the addition of both pure capacitive material (such as Carbon and its derivative) and pure battery-type material (transition-metal Oxide, hydroxides). Mesoporous carbon due to its advanced feature along with ZrO2 good fit on performance and environmental aspect parameters. In this report, we have prepared environmentally friendly mesoporous carbon ZrO2 composite by the facile method, initially, ZrO2 is prepared hydrothermally after that mixing is done at room temperature to obtain the final product mesoporous carbon@ZrO2. The material structural, and microstructural examinations are done by X-ray diffraction analysis, and field emission scanning electron microscopy. The galvanostatic charging-discharging analysis shows the specific capacitance of the device is 125 F/g and the energy density of the device is 25 Wh/kg at a current density of 0.5 A g-1. The GCD shows an extreme power density of 1201 W/kg at 1 mA. The CV analysis shows the maximum specific capacitance of 54.5 F/g at 10 mV/Sec. The long-term cyclic stability of up to 10000 cycles is tested through GCD. The device shows high capacitance retention and Coulombic efficiency till the last GCD cycle at 82 % and 100 % respectively. The capacitive contribution is 55% for optimized electrodes. The prototype device formation and load (LED) testing are done at the laboratory. Based on experimental findings we have proposed a charge storage mechanism for a better understanding of readers.

A review on potential use of cerium oxide and doped cerium oxide as high dielectric constant seed layers for overgrowth of cerium oxide nanostructures

“…Many studies have been conducted on using high k oxide materials to replace SiO 2 for MOS based devices. Diverse high k materials, such as zirconium oxide (ZrO 2 ) [39,40], hafnium oxide [53][54][55], lanthanum aluminium oxide (LaAlO 3 ) [56,57], and hafnium silicate (HfSiO 4 ) [17,[58][59][60][61] have been investigated as the probable contenders for reinstating SiO 2 as the passivation layer for MOS devices. A comparison of performance displayed by using the various high k materials was summarized in table 1.…”

Polypyrrole and activated carbon enriched MnCo2O4 ternary composite as efficient electrode material for hybrid supercapacitors

“…The most commonly used electrochemical storage set-ups are batteries and fuel cells. 2–4 They have very high energy storage capacity (high energy density) because of the intercalation process drawn in the charge storage. However, the intercalation process during charging and discharging in batteries makes their response time relatively high, resulting in low power delivery.…”

Nanometer-thin ZrO2 Coating for NiO on MWCNTs as Anode for Improved Performance of Sodium-Ion Batteries

“…16 Among all TMOs, ZrO 2 and NiO are good choices as anode materials offering appreciably high theoretical capacities of 868 and 718 mAh g −1 , respectively. 17,18 NiO has very good thermal and chemical stability, is nontoxic, has a high natural abundance, and can be easily synthesized. Similarly, NiO-based composites have numerous breakthroughs in energy storage systems.…”

“…It has been determined that transition metal oxides (TMOs) and their composites have great electrochemical performance and diverse compositions and structures that have been attracting considerable attention in recent years . Among all TMOs, ZrO 2 and NiO are good choices as anode materials offering appreciably high theoretical capacities of 868 and 718 mAh g –1 , respectively. , NiO has very good thermal and chemical stability, is nontoxic, has a high natural abundance, and can be easily synthesized. Similarly, NiO-based composites have numerous breakthroughs in energy storage systems. , However, the restacking of NiO nanostructures causes surface area reduction, and also the poor electrical conductivity of NiO results in a weak electrochemical performance.…”