Improving the Energy Storage of Supercapattery Devices through Electrolyte Optimization for Mg(NbAgS)x(SO4)y Electrode Materials

Abstract

Electrolytes are one of the most influential aspects determining the efficiency of electrochemical supercapacitors. Therefore, in this paper, we investigate the effect of introducing co-solvents of ester into ethylene carbonate (EC). The use of ester co-solvents in ethylene carbonate (EC) as an electrolyte for supercapacitors improves conductivity, electrochemical properties, and stability, allowing greater energy storage capacity and increased device durability. We synthesized extremely thin nanosheets of niobium silver sulfide using a hydrothermal process and mixed them with magnesium sulfate in different wt% ratios to produce Mg(NbAgS)x)(SO4)y. The synergistic effect of MgSO4 and NbS2 increased the storage capacity and energy density of the supercapattery. Multivalent ion storage in Mg(NbAgS)x(SO4)y enables the storage of a number of ions. The Mg(NbAgS)x)(SO4)y was directly deposited on a nickel foam substrate using a simple and innovative electrodeposition approach. The synthesized silver Mg(NbAgS)x)(SO4)y provided a maximum specific capacity of 2087 C/g at 2.0 A/g current density because of its substantial electrochemically active surface area and linked nanosheet channels which aid in ion transportation. The supercapattery was designed with Mg(NbAgS)x)(SO4)y and activated carbon (AC) achieved a high energy density of 79 Wh/kg in addition to its high power density of 420 W/kg. The supercapattery (Mg(NbAgS)x)(SO4)y//AC) was subjected to 15,000 consecutive cycles. The Coulombic efficiency of the device was 81% after 15,000 consecutive cycles while retaining a 78% capacity retention. This study reveals that the use of this novel electrode material (Mg(NbAgS)x(SO4)y) in ester-based electrolytes has great potential in supercapattery applications.

Effect of electrolyte optimization on nitrogen-doped MXene (Ti3C2Tx) coupled with Cu–BTC MOF for a supercapattery and the hydrogen evolution reaction

“…The slope of the graph at various potentials exhibited values ranging from 0.48 to 0.7, aligning with the anticipated theoretical range for supercapatteries. 78 The CV curves exhibit symmetry at higher scan rates, underscoring the exceptional stability and rate capability of the device. The Cu-BTC/N-MXene//N-MXene sample delivered the optimum Q s of 118.75 C g À1 at 10 mV s À1 .…”

“…The slope of the graph at various potentials exhibited values ranging from 0.48 to 0.7, aligning with the anticipated theoretical range for supercapatteries. 78…”

Influence of temperature on the redox behaviour of binder-free CNTs-NiZnS electrode and the application in efficient energy storage devices

“…Asymmetric supercapacitors have a higher capacitance than ordinary electrolytic capacitors and pseudocapacitors [18]. It is critical to choose active materials for supercapattery applications based on electrochemical characteristics such as excellent electrical properties, durability, oxidation/reduction reaction, larger surface area, high porosity, and most importantly remarkable electrocatalytic performance [19][20][21]. The storage capability of supercapacitors mainly depends on the structure of the electrode material [22].…”

AgCo-MOF/MnS Deposited on Carbonized Wood Substrate: Pioneering the Future of Supercapacitors and Oxygen Evolution Reactions

“…Energy storage is critical in modern civilization. In contrast to traditional fossil energy technological advances, introducing new renewable energy sources has sparked the interest of many industries, including autos, home appliances, and biomedicine. , This green energy technology is highly recognized because of its ecologically friendly, feasible, economical, and renewable characteristics. Supercapattery, a potential energy storage technology, has recently received much attention. , It offers a unique way to meet the rising need for efficient and outstanding durability energy storage systems by combining the benefits of both supercapacitors and batteries.…”

“…In contrast to traditional fossil energy technological advances, introducing new renewable energy sources has sparked the interest of many industries, including autos, home appliances, and biomedicine. 1,2 This green energy technology is highly recognized because of its ecologically friendly, feasible, economical, and renewable characteristics. Supercapattery, a potential energy storage technology, has recently received much attention.…”