Porous zinc cobaltite (ZnCo₂O₄) film by successive ionic layer adsorption and reaction towards solid-state symmetric supercapacitive device

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• 作者：Shrikant S. Raut ; Babasaheb R. Sankapal ; ^{brsankapal@phy.vnit.ac.in" class="auth_mail" title="E-mail the corresponding author} ; ^{brsankapal@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：SILAR ; ZnCo2O4 ; Solid-state symmetric supercapacitor cell
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：487
• 期：Complete
• 页码：201-208
• 全文大小：2982 K

文摘

One-step, simple and inexpensive successive ionic layer adsorption and reaction (SILAR) method has been used to synthesize porous network of zinc cobaltite (ZnCo₂O₄) in 2D form on stainless steel (SS) substrate. Porous structure of ZnCo₂O₄ electrode enables electrochemical specific capacitance of 675 Fg⁻¹ at 5 mV s⁻¹ sweep rate with high rate capability and cycling performance of 69% over 2000 cycles. Furthermore, fabricated ZnCo₂O₄ solid-state supercapacitor cell in symmetric mode using PVA-KOH gel electrolyte exhibited a specific capacitance of 69.65 Fg⁻¹ with specific energy of 9.67 Wh kg⁻¹ and specific power of 1.45 kW kg⁻¹ at a current density of 1.07 Ag⁻¹. The results clearly demonstrate the facile method for the synthesis of porous network of ZnCo₂O₄ and make them promising electrode material for energy storage application.