A novel geometry of sharp-edged electrodes for planar micro-electrochemical capacitors is utilized for an enhanced performance compared to the conventionally used interdigitated electrodes. The sharp-edged electrode geometry achieves a 68% enhancement in the electric field at the sharp-edge of the electrodes as compared to interdigitated electrodes. Moreover, carbon foam with high specific surface area loaded with iron oxide nanoparticles allows a large mass loading for the pseudocapacitance in addition to electric double layer capacitance (EDLC). Thus, an enhancement of 235% was obtained in both the areal specific capacitance and energy density when the performance was compared with the interdigitated electrode based supercapacitors. Moreover, an excellent cycling stability (∼99.5%) over 10 000 charge–discharge cycles was also achieved. The high-performance architecture of sharp-edged electrodes paves a way for smart electrochemical capacitors using an efficient planar structure in combination with high-loading materials for large pseudocapacitance as well as EDLC.

中文翻译：

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基于高性能CF / Fe2O3的平面固态微电化学电容器的新型电极几何形状。

与常规使用的叉指式电极相比，用于平面微电化学电容器的新型锐边电极具有更高的性能。与叉指式电极相比，锋利的电极几何形状可在电极的锐边实现68％的电场增强。此外，负载有氧化铁纳米颗粒的具有高比表面积的碳泡沫除了双电层电容（EDLC）之外，还为假电容带来了较大的质量负载。因此，当与基于叉指电极的超级电容器进行性能比较时，面积比电容和能量密度都提高了235％。此外，在10000次充放电循环中也获得了出色的循环稳定性（〜99.5％）。