基于核壳花状电极的高性能可伸缩超级电容器与光电探测器的集成

High-performance stretchable and compressible supercapacitor based on the core-shell flower structured electrode for integration with photodetectors

将储能装置与太阳能电池集成一体化对发展具有稳定功率输出的可穿戴和柔性电子产品是一种挑战.分别以Co_(3)O_(4)@Ni-Co-S和FeSe_(2)为正极和负极,研制了一种高性能柔性非对称全固态纤维状超级电容器.制备的Co3O_(4)@Ni-Co-S电极由于具有3D核-壳微型菊花和微型雪花结构表现出优异的体积比电容(5.0 F·cm^(-3),0.4 mA)和良好的循环性能(5000次循环后性能保留83.6%).此外,利用硅太阳能电池直接光充电制作了非对称超级电容器(PSC).即使在任何弯曲角度及可伸缩状态下,所得的PSC均可为基于TiO_(2)阳极和PEDOT阴极的微型柔性光电探测器供电.核壳Co_(3)O_(4)@Ni-Co-S微型菊花电极还显示出优异的电催化析氢性能,展示了构建高性能柔性和可穿戴能源设备的巨大潜力.

The integration of energy storage devices with solar cells is a challenge to the development of wearable and flexible electronics with stable power output.A high-performance flexible asymmetric all-solid-state fiber supercapacitor was fabricated with Co_(3)O_(4)@Ni-Co-S and FeSe_(2) as the positive and negative electrodes,respectively.The as-prepared Co3O_(4)@Ni-Co-S electrodes demonstrated outstanding volume-specific capacitance(5.0 F·cm^(-3) at 0.4 mA)and excellent cycling performance(83.6%after 5000 cycles)owing to their 3D core-shell micro-chrysanthemum flower and micro-snowflakes structures.Furthermore,photo-charged asymmetric supercapacitor(PSC)was prepared by using silicon solar cells for direct photo-charging.The resulting PSC could also be used to power a mini-scale flexible photodetector based on TiO_(2) anode and PEDOT cathode under any bending angles and under stretchable/compressible states.In addition,core-shell Co_(3)O_(4)@Ni-Co-S micro-chrysanthemum electrodes displayed exciting electrocatalytic hydrogen evolution reactions,showing excellent potential for the construction of high-performance flexible and wearable energy devices.