Abstract Prototype solid-state symmetric supercapacitor (SSS) device has been designed by using two MWCNT/Fe2O3 electrodes assembled through polyvinyl alcohol-lithium chloride gel electrolyte as mediator onto flexible stainless steel substrate. Through electrochemical investigation as-fabricated device demonstrated 70.16 F g−1 of specific capacitance with remarkable 9.74 W h kg−1 specific energy and 487 W kg−1 specific power at current density of 0.57 A g−1. Assembled device delivers an outstanding volumetric energy of 24.36 mW h cm−3 compensating volumetric power of 1218 mW cm−3 at a current density of 1.42 mA cm−3. The cycle repeatability test of MWCNTs/Fe2O3 SSS device exhibited capacitance retention of 75% for 1500 cycles.

中文翻译：

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基于原型对称配置的 MWCNTs/Fe2O3 固态超级电容器

摘要 利用聚乙烯醇-氯化锂凝胶电解质组装的两个MWCNT/Fe2O3电极作为介质，在柔性不锈钢基板上设计了原型固态对称超级电容器（SSS）器件。通过电化学研究，制造的器件在 0.57 A g-1 的电流密度下展示了 70.16 F g-1 的比电容，具有显着的 9.74 W h kg-1 比能量和 487 W kg-1 比功率。组装后的器件在 1.42 mA cm-3 的电流密度下提供了 24.36 mW h cm-3 的出色体积能量，补偿了 1218 mW cm-3 的体积功率。MWCNTs/Fe2O3 SSS 器件的循环重复性测试显示，1500 次循环的电容保持率为 75%。