Enhanced electrochemical performance of monoclinic WO₃ thin film with redox additive aqueous electrolyte

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• 作者：Pragati A. Shinde^a ; Vaibhav C. Lokhande^b ; Nilesh R. Chodankar^a ; Taeksoo Ji^b ; Jin Hyeok Kim^c ; ^{jinhyeok@chonnam.ac.kr" class="auth_mail" title="E-mail the corresponding author} ; Chandrakant D. Lokhande^a ; ^{l_chandrakant@yahoo.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Chemical bath deposition ; Redox additive aqueous electrolyte ; Supercapacitor ; Thin film ; WO3
• 刊名：Journal of Colloid and Interface Science
• 出版年：2016
• 出版时间：1 December 2016
• 年：2016
• 卷：483
• 期：Complete
• 页码：261-267
• 全文大小：1606 K

文摘

To achieve the highest electrochemical performance for supercapacitor, it is very essential to find out a suitable pair of an active electrode material and an electrolyte. In the present work, a simple approach is employed to enhance the supercapacitor performance of WO₃ thin film. The WO₃ thin film is prepared by a simple and cost effective chemical bath deposition method and its electrochemical performance is tested in conventional (H₂SO₄) and redox additive [H₂SO₄ + hydroquinone (HQ)] electrolytes. Two-fold increment in electrochemical performance for WO₃ thin film is observed in redox additive aqueous electrolyte compared to conventional electrolyte. WO₃ thin film showed maximum specific capacitance of 725 Fg⁻¹, energy density of 25.18 Wh kg⁻¹ at current density of 7 mA cm⁻² with better cycling stability in redox electrolyte. This strategy provides the versatile way for designing the high performance energy storage devices.