Mohamed Ismail M, Vigneshwaran J, Arunbalaji S, Mani D, Arivanandhan M, Jose Sujin P, Jayavel R
Centre for Nanoscience and Technology, Anna University, Chennai-600025, India.
Dalton Trans. 2020 Oct 21;49(39):13717-13725. doi: 10.1039/d0dt01753a. Epub 2020 Sep 30.
Antimonene is an exfoliated 2D nanomaterial obtained from bulk antimony. It is a novel class of 2D material for energy storage applications. In the present work, antimonene was synthesized using a high-energy ball milling-sonochemical method. The structural, morphological, thermal, and electrochemical properties of antimonene were comparatively analyzed against bulk antimony. X-ray diffractometry (XRD) analysis confirms the crystal structure and 2D structure of antimonene, as a peak shift was observed. The Raman spectra show the peak shift for the E and A modes of vibration of antimony, which confirms the formation of antimonene. Scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) images depict the exfoliation of antimonene from bulk antimony. Thermal analysis unveiled the thermal stability of antimonene up to 400 °C with only 3% weight loss. X-ray photoelectron spectroscopy (XPS) analysis reveals the formation of antimonene, which is free from contamination. The electrochemical properties of antimony and antimonene were investigated using cyclic voltammetry (CV) and chronopotentiometric (CP) analysis, using 2 M KOH as an electrolyte. Antimonene exhibited a relatively high specific capacitance of 597 F g compared to ball-milled antimony (101 F g) at a scan rate of 10 mV s. Moreover, electrochemical impedance spectroscopy (EIS) analysis revealed that antimonene has a relatively low equivalence series resistance (RESR) and low charge transfer resistance (RCT) compared to bulk antimony, which favors high electrochemical performance. The cyclic stability of antimonene was studied for 3000 cycles, and the results show high cyclic stability. The electrochemical results demonstrated that antimonene is a promising material for energy storage applications.
锑烯是一种从块状锑剥离得到的二维纳米材料。它是用于储能应用的新型二维材料。在本工作中，采用高能球磨-声化学法合成了锑烯。对锑烯的结构、形态、热学和电化学性质与块状锑进行了比较分析。X射线衍射（XRD）分析证实了锑烯的晶体结构和二维结构，因为观察到了峰位移。拉曼光谱显示了锑的E和A振动模式的峰位移，这证实了锑烯的形成。扫描电子显微镜（SEM）和高分辨率透射电子显微镜（HRTEM）图像描绘了锑烯从块状锑的剥离。热分析表明锑烯在高达400℃时具有热稳定性，失重仅3%。X射线光电子能谱（XPS）分析揭示了无污染的锑烯的形成。以2 M KOH为电解质，采用循环伏安法（CV）和计时电位法（CP）分析研究了锑和锑烯的电化学性质。在扫描速率为10 mV s时，锑烯的比电容为597 F g，相比球磨锑（101 F g）相对较高。此外，电化学阻抗谱（EIS）分析表明，与块状锑相比，锑烯具有相对较低的等效串联电阻（RESR）和较低的电荷转移电阻（RCT），这有利于高电化学性能。研究了锑烯3000次循环的循环稳定性，结果显示出高循环稳定性。电化学结果表明，锑烯是一种有前途的储能应用材料。
