Fabrication and performance evaluation of rare earth lanthanum sulfide film for supercapacitor application: Effect of air annealing
Fabrication and performance evaluation of rare earth lanthanum sulfide film for supercapacitor application: Effect of air annealing
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DOI：
10.1016/j.matdes.2015.08.084
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发表时间：
2015-12-15
影响因子：
8.4
通讯作者：
Lokhande, Chandrakant D.
中科院分区：
文献类型：
--
作者：
Patil, Swati J.;Lokhande, Chandrakant D.
研究了化学浴沉积法制备的稀土硫化镧（La2S3）薄膜作为超级电容器电极材料的电化学性能。研究了空气退火对La2S3薄膜结构、表面形貌和润湿性的影响。x射线衍射和FT-Raman分析证实了La2S3薄膜的形成。La2S3膜呈多孔海绵状网状结构，具有亲水性。采用循环伏安法和恒流充放电模式对La2S3电极的超电容性能进行了评价。在扫描速率为5 mV s-1时，空气退火La2S3电极的最大比电容为294 F g(-1)，在1000次循环中具有89%的电化学循环稳定性。空气退火La2S3薄膜的海绵状网状结构提高了薄膜的超电容性能。La2S3电极的优良性能为柔性La2S3/LiClO4-PVA/La2S3固态超级电容器器件的制备提供了有利条件。研究了不同弯曲角度和循环稳定性下超级电容器器件的比电容。(C) 2015 Elsevier Ltd.版权所有。
In this work, the electrochemical properties of rare earth lanthanum sulfide (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. (C) 2015 Elsevier Ltd. All rights reserved.