Chemical synthesis and supercapacitive properties of lanthanum telluride thin film

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• 作者：S.J. Patil^a ; ^c ; A.C. Lokhande^b ; D.-W. Lee^c ; J.H. Kim^b ; C.D. Lokhande^a ; ^{l_chandrakant@yahoo.com}
• 关键词：Pine-leaf like flaky array ; Thin film ; Supercapacitor ; Energy density
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：490
• 期：Complete
• 页码：147-153
• 全文大小：2535 K
• 卷排序：490

文摘

Lanthanum telluride (La2Te3) thin films are synthesized via a successive ionic layer adsorption and reaction (SILAR) method. The crystal structure, surface morphology and surface wettability properties are investigated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Field emission scanning electron microscopy (FE-SEM) and contact angle goniometer techniques, respectively. The La2Te3 material exhibits a specific surface area of 51 m2 g−1 determined by Brunauer-Emmett-Teller (BET) method. La2Te3 thin film electrode has a hydrophilic surface which consists of interconnected pine leaf-like flaky arrays that affect the performance of the supercapacitor. The supercapacitive performance of La2Te3 film electrode is evaluated in 1 M LiClO4/PC electrolyte using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy techniques. La2Te3 film electrode exhibits a specific capacitance of 194 F g−1 at a scan rate of 5 mV s−1 and stored energy density of 60 W h kg−1 with delivering power density of 7.22 kW kg−1. La2Te3 film electrode showed capacitive retention of 82% over 1000 cycles at a scan rate of 100 mV s−1. Further, flexible La2Te3|LiClO4-PVA|La2Te3 supercapacitor cell is fabricated.