Ali Basant A, Biby Ahmed H, Allam Nageh K
Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt.
Chem Commun (Camb). 2021 Apr 4;57(26):3231-3234. doi: 10.1039/d0cc07887e. Epub 2021 Mar 1.
Intercalation of alkali metals has proved to be an effective approach for the enhancement of the energy storage performance in layered-2D materials. However, the research so far has been limited to Li and Na ion intercalation with K ions being recently investigated. Although cesium (Cs) salts are highly soluble in water, Cs intercalation has been addressed neither in batteries nor in supercapacitors so far. Herein, we demonstrate the exceptional effect of Cs intercalation in MoS as a model 2D material to boost its performance as a potential supercapacitor electrode. Cs intercalation was found to stabilize the metastable 1T phase and increase the conductivity of the 2H and 3R phases. Cs-Intercalated 1T MoS showed higher quantum capacitance (C) than doped graphene.
碱金属插层已被证明是提高二维层状材料储能性能的有效方法。然而，迄今为止的研究仅限于锂和钠离子插层，最近才开始研究钾离子插层。尽管铯盐在水中的溶解度很高，但迄今为止，电池和超级电容器中均未涉及铯插层。在此，我们展示了铯插层在作为模型二维材料的二硫化钼中的特殊作用，以提高其作为潜在超级电容器电极的性能。研究发现，铯插层可稳定亚稳的1T相，并提高2H和3R相的电导率。铯插层的1T相二硫化钼表现出比掺杂石墨烯更高的量子电容（C）。
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