Bulletin of Materials Science ( IF 1.9 ) Pub Date : 2021-07-19 , DOI: 10.1007/s12034-021-02502-6 S Kiruthika 1 , Giridhar U Kulkarni 2
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In this work, supercapacitors have been fabricated using Pd4S electrode material which is highly conducting and chemically robust to the acid and alkali media. The synthesis strategy is simple and involves a single step thermolysis of palladium octanethiolate film in the H2 atmosphere at 250°C for 1 h. Besides its conducting nature, its porous morphology makes it a suitable electrode material for supercapacitors. The electrochemical properties of the Pd4S were examined in harsh alkali media (30 M KOH). Typically, in the literature, only lower electrolyte concentration (1–6 M KOH) is preferred as the electrode may not withstand higher concentrations. Using the prepared Pd4S film as supercapacitor electrode, a specific capacitance of 570 F g−1 with energy and power densities of 28 Wh kg−1 and 1.5 kW kg−1, respectively, were achieved with 30 M KOH electrolyte. After 1500 cycles of charging and discharging with a constant current density of 1.75 A g−1, more than 98% capacitance retention was observed.
Graphic abstract
中文翻译：
用 30 M KOH 电解质和高度稳定的 Pd4S 电极制造的超级电容器
在这项工作中，使用 Pd 4 S 电极材料制造了超级电容器，该电极材料对酸和碱介质具有高导电性和化学稳定性。合成策略很简单，涉及辛硫醇钯薄膜在 H 2气氛中在 250°C 下单步热解1 小时。除了其导电性质外，其多孔形态使其成为超级电容器的合适电极材料。在苛刻的碱性介质 (30 M KOH) 中检查了 Pd 4 S的电化学性质。通常，在文献中，只有较低的电解质浓度 (1-6 M KOH) 是首选，因为电极可能无法承受更高的浓度。使用准备好的 Pd 4S 膜作为超级电容器电极，使用 30 M KOH 电解质实现了570 F g -1的比电容，能量密度和功率密度分别为 28 Wh kg -1和 1.5 kW kg -1。在以 1.75 A g -1的恒定电流密度进行 1500 次充电和放电循环后，观察到超过 98% 的电容保持率。
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