Akademik Veri Yönetim Sistemi
Materials Chemistry and Physics, cilt.360, 2026 (SCI-Expanded, Scopus)
The evolution of advanced electrochemical energy storage systems depends on the rational design and synergy of component materials.This study provides a method for implementing a BiOBr, CuO and MXene (Ti3C2Tx, Tx = –F,-O,-OH,-Cl,-Br,-I) tripartite composite system to generate efficient zinc-ion hybrid supercapacitors (ZHSCs).The electrochemical performance was assessed utilizing three electrolyte types: a conventional electrolyte (C-ZHSC) and two redox-active electrolytes, potassium bromide (B-ZHSC) and potassium ferrocyanide (F-ZHSC).The specific surface area (SSA) of the MXene@CuO@BiOBr composite attained 47.77 m2 g−1, nearly twice that of CuO (23.80 m2 g−1) and markedly greater than that of BiOBr (7.07 m2 g−1).The electrochemical analysis demonstrated that the MXene@CuO@BiOBr composite delivered an outstanding specific capacitance (Cs) of 796 F g−1 at a current density of 1 A g−1, together with a remarkably broad potential window ranging from −1.2 to 0.42 V. In contrast, the C-ZHSC system obtained a maximum Cs of 288 F g−1 at 2.5 A g−1 within a potential window of 0.9-2.2 V. Furthermore, the device exhibited excellent energy and power characteristics, with the highest energy density (ED) of 68 Wh kg−1 and an impressive maximum power density (PD) of 26,000 W kg−1, underscoring the superior electrochemical efficiency of the designed system. The redox-active electrolytes noticeably enhanced performance: B-ZHSC boosted Cs and ED by around 1.3-fold (365 F g−1, 86 Wh kg−1), while F-ZHSC exhibited an even more substantial enrichment, nearly 1.9-fold (544 F g−1, 128 Wh kg−1) comparative to C-ZHSC. Power density remained consistent across all systems. The B-ZHSC and F-ZHSC devices obtained enhanced cycle stability, achieving capacity retentions of 79% and 84% following extended cycling, which corresponds to about 5%-fold and 10%-fold improvements, respectively, compared to C-ZHSC (74%). The improvements are ascribed to the efficient inhibition of zinc dendrite formation by redox additives. The MXene@CuO@BiOBr composite, particularly in conjunction with redox-active electrolytes, demonstrates significant promise for next-generation ZHSCs owing to its elevated capacitance, energy density, and prolonged cycle life.