Add time:08/10/2019         Source:sciencedirect.com

In this work, the electrochemical properties of rare earth LANTHANUM SULFIDE (cas 12325-81-4) (La2S3) 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 La2S3 films is studied. The X-ray diffraction and FT-Raman analysis confirm the formation La2S3 film. A porous spongy network of La2S3 film reveals the hydrophilic nature. The supercapacitive properties of La2S3 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 La2S3 electrode at a scan rate of 5 mV s− 1 with 89 % electrochemical cyclic stability over 1000 cycles. The spongy network of air-annealed La2S3 film enhances the supercapacitive performance. The auspicious properties of La2S3 electrode are effective for the fabrication of flexible La2S3/LiClO4-PVA/La2S3 solid-state supercapacitor device. The specific capacitance of supercapacitor device with diverse bending angles and cyclic stability is examined.

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