Free-standing and flexible graphene supercapacitors of high areal capacitance fabricated by laser holography reduction of graphene oxide
Free-standing and flexible graphene supercapacitors of high areal capacitance fabricated by laser holography reduction of graphene oxide
复制标题
通过激光全息还原氧化石墨烯制备高面积电容的独立式柔性石墨烯超级电容器
DOI：
10.1063/5.0038508
复制
发表时间：
2021-02-15
影响因子：
4
通讯作者：
Zhang, Yong-Lai
中科院分区：
文献类型：
--
作者：
Fu, Xiu-Yan;Cai, Qing;Zhang, Yong-Lai
氧化石墨烯(GO)的光还原具有开发高性能超级电容器(SC)用石墨烯电极的巨大潜力。然而，光还原氧化锌(PRGO)的微纳米结构不足限制了其电化学性能。本文将双光束激光干涉技术与掩模技术相结合，提出了一种基于PRGO的层次化平面SC结构。这种分层结构改善了PRGO与电解液之间的表面积，有助于形成双电层电容器。基于PRGO的交叉指尖集电体的平面器件结构有利于快速的离子扩散路径。结果表明，基于PRGO的层次化结构的平面SC在10 mV(-1)时获得了3.97 mFcm(-2)的面电容。本文提出的在平面SC设计中采用层次结构PRGO的策略，为制造高性能集成储能器件提供了一条新的途径。
Photoreduction of graphene oxide (GO) holds great potential for developing graphene-based electrodes for high-performance supercapacitors (SCs). However, the insufficient micro-nanostructure on photoreduced GO (PRGO) restricts its electrochemical performance. Here, a hierarchically structured PRGO-based planar SC is reported by combining two-beam-laser-interference with the masking technique. The hierarchical structures improve the surface area between PRGO and electrolyte and contribute to format electric double-layer capacitors. Planar device structures with PRGO-based interdigital finger current collectors are beneficial for rapid ion diffusion paths. As a result, the hierarchically structured PRGO-based planar SC achieves an areal capacitance of 3.97 mFcm(-2) at 10mVs(-1). The proposed strategy of employing hierarchically structured PRGO in the planar SC design offers a new route for manufacturing high-performance integrated energy storage devices.