Fabrication and performance evaluation of rare earth lanthanum sulfide film for supercapacitor application: Effect of air annealing. (15th December 2015)

• Record Type: Journal Article
• Authors: Patil, Swati J.; Lokhande, Chandrakant D.
• Is Part Of: Materials & design. Volume 87(2015:Dec.)
• Page Start: 939
• Page End: 948
• Publication Date: 2015-12-15
• Subjects: Lanthanum sulfide -- Thin film -- Cyclic voltammetry -- Supercapacitor -- Solid-state device; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2015.08.084
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: In this work, the electrochemical properties of rare earth lanthanum sulfide (La2 S3 ) films obtained by chemical bath deposition method are investigated as an electrode material for supercapacitor application. The effect of air annealing on structural, surface morphological and wettability properties of La2 S3 films is studied. The X-ray diffraction and FT-Raman analysis confirm the formation La2 S3 film. A porous spongy network of La2 S3 film reveals the hydrophilic nature. The supercapacitive properties of La2 S3 electrode are evaluated using cyclic voltammetry and galvanostatic charge–discharge mode. The maximum specific capacitance of 294 F g − 1 is achieved for air-annealed La2 S3 electrode at a scan rate of 5 mV s − 1 with 89 % electrochemical cyclic stability over 1000 cycles. The spongy network of air-annealed La2 S3 film enhances the supercapacitive performance. The auspicious properties of La2 S3 electrode are effective for the fabrication of flexible La2 S3 /LiClO4 -PVA/La2 S3 solid-state supercapacitor device. The specific capacitance of supercapacitor device with diverse bending angles and cyclic stability is examined. Graphical abstract: Highlights: Spongy network of La2 S3 film is prepared by simple, inexpensive, chemical bath deposition method. The supercapacitive performance of air-annealed La2 S3 is higher than that of as-deposited electrode. The flexible lightweight supercapacitor exhibits good electrochemical performance.