The quest for efficient supercapacitors exhibiting excellent energy and power densities for portable devices and electric vehicles necessitates the discovery of advanced electrode materials. In this study, we utilize sodium dodecyl sulfate (SDS) as a phase and shape-directing surfactant at various concentrations (X wt% = 1, 3, 7, and 10) to synthesize bismuth iron oxide cubes (BiFeO) via hydrothermal route. The effect of SDS on the electrochemical activity is compared with BiFeO, which is synthesized similarly without SDS. The newly-made BiFeO is studied in terms of its crystal structure, phase, morphology, bandgap, and quantum states using various characterization techniques. Galvanostatic charge-discharge and Cyclic voltammetry electrochemical studies indicate that BiFeO has unique and improved properties compared to conventional BiFeO. Remarkably, the 7 wt% SDS-assisted BiFeO (S–BFO–S7) electrode demonstrates a maximum specific capacity (C) of 240 C g, even at a higher current density of 4 A g. In addition, we construct an asymmetric supercapacitor (ASC) using S–BFO–S7 and activated carbon, which delivers an exceptional power density of 2531 W kg, the energy density of 21.8 W h kg, and maintains 74% stability upon 5000 cycles of GCD. These outstanding results position BiFeO as an interesting contender for advanced supercapacitors.

中文翻译：

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利用相调节剂增强超级电容和能量密度：Bi25FeO40 微立方体视角

为了寻找适合便携式设备和电动汽车的具有优异能量和功率密度的高效超级电容器，需要发现先进的电极材料。在本研究中，我们利用不同浓度（X wt% = 1、3、7和10）的十二烷基硫酸钠（SDS）作为相和形状导向表面活性剂，通过水热途径合成氧化铁铋立方体（BiFeO）。将 SDS 对电化学活性的影响与 BiFeO 进行比较，BiFeO 的合成类似，无需 SDS。使用各种表征技术研究了新制备的 BiFeO 的晶体结构、相、形貌、带隙和量子态。恒电流充放电和循环伏安电化学研究表明，与传统 BiFeO 相比，BiFeO 具有独特且改进的性能。值得注意的是，即使在 4 A g 的较高电流密度下，7 wt% SDS 辅助的 BiFeO (S–BFO–S7) 电极也表现出 240 C g 的最大比容量 (C)。此外，我们使用S–BFO–S7和活性炭构建了一种非对称超级电容器（ASC），其功率密度高达2531 W kg，能量密度为21.8 W h kg，并在5000次循环后保持74%的稳定性。 GCD。这些出色的结果使 BiFeO 成为先进超级电容器的有力竞争者。