Electrolyte-Driven Behavior of Symmetric Supercabatteries Based on CuS/CoS/Bi2S3 Metal–Sulfur Biomolecule Hybrids

OpenAlex İngilizce

Supercabatteries (SCB) are emerging as the ideal energy storage solution for applications requiring high power and energy output. This study offers an efficient approach for synthesizing a ternary multifunctional SCB electrode material composed of CuS, CoS, and Bi 2 S 3 . Biomolecular l -cysteine (L) and thiourea (T) were utilized as sulfide sources to improve the electrochemical efficiency of the electrodes. The l -cysteine increased the specific surface area (SSA) of CuS by ∼1.5-fold, that of CoS by ∼9-fold, and that of Bi 2 S 3 by ∼1.2-fold. The best-performing CuS@CoS@Bi 2 S 3 hybrid electrode was utilized in the construction of symmetric SCB devices operating at a voltage of up to 1.65 V. The use of an electrolyte doped with a redox additive potassium ferrocyanide [K 4 [Fe(CN) 6 ]] was key in obtaining superior electrochemical performance leading to an energy density of 128 Wh kg –1 and a power density of 50.000 W kg –1 with considerable enhancements in the cycle durability.