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首页> 外文期刊>New Journal of Chemistry >An anionic and cationic surfactant-assisted hydrothermal synthesis of cobalt oxide nanoparticles as the active electrode material for supercapacitors
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An anionic and cationic surfactant-assisted hydrothermal synthesis of cobalt oxide nanoparticles as the active electrode material for supercapacitors

机译：作为超级电容器的活性电极材料的钴氧化物纳米粒子的阴离子和阳离子表面活性剂辅助水热合成

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The depletion of the traditional fuels and unavoidable seasonal intermittence in solar/wind energy has made an urgent call to develop suitable energy conversion and storage systems. Since both the efficiency and cost of these systems are greatly impacted by electroactive materials, designing an efficient material through a scalable methodology is indispensable. Keeping these things in mind, we demonstrated the synthesis of Co3O4 nanoflakes via the anionic (cetyl trimethylammonium bromide; CTAB) and cationic (sodium lauryl sulphate; SLS) surfactant-assisted hydrothermal method at different annealing temperatures (350 degrees C and 500 degrees C). The uniform surface morphology and crystallinity of the as-synthesized nanoflakes were analysed via field emission scanning electron microscopy, transmission electron microscopy, and powder X-ray diffraction techniques. Further, the electrochemical charge storage performances of these nanoflakes were explored in a three-electrode electrochemical measurement. The CTAB-assisted Co3O4 showed an impressive charge storage performance in terms of higher specific capacitance (777.45 F g(-1)), energy (32.66 W h kg(-1)) and power (39.8 kW kg(-1)) densities (E-D and P-D) compared to that derived through SLS. Further, the CTAB-500 degrees C showed better cyclic durability with 83% retention of the initial capacitance after 5000 repeated cycles. Therefore, we presume that the present synthetic strategy will be a scalable and efficient method for the synthesis of Co3O4 that can be used as a future energy storage material for sustainability.
机译：传统燃料的枯竭和太阳能/风能不可避免的季节性间歇，迫切需要开发合适的能量转换和存储系统。由于这些材料的有效性和设计方法的有效性都受到了极大的影响。牢记这些，我们演示了在不同退火温度（350℃和500℃）下，通过阴离子（十六烷基三甲基溴化铵；CTAB）和阳离子（十二烷基硫酸钠；SLS）表面活性剂辅助水热法合成Co3O4纳米片。通过场发射扫描电子显微镜、透射电子显微镜和粉末X射线衍射技术分析了合成纳米片的均匀表面形貌和结晶度。此外，在三电极电化学测试中探索了这些纳米片的电化学电荷存储性能。与SLS相比，CTAB辅助的Co3O4在更高的比电容（777.45 F g（-1））、能量（32.66 W h kg（-1））和功率（39.8 kW kg（-1））密度（E-D和P-D）方面表现出令人印象深刻的电荷存储性能。此外，CTAB-500°C显示出更好的循环耐久性，在5000次重复循环后，初始电容保持率为83%。因此，我们认为，目前的合成策略将是一种可扩展且高效的合成Co3O4的方法，可作为未来可持续发展的储能材料。

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