Laser photonic-reduction stamping for graphene-based micro-supercapacitors ultrafast fabrication

作者：Yongjiu Yuan, Lan Jiang, Xin Li, Pei Zuo, Chenyang Xu, Mengyao Tian, Xueqiang Zhang, Sumei Wang, Bing Lü, Changxiang Shao, Bingquan Zhao, Jiatao Zhang, Liangti Qu, Tianhong Cui · 发表于：Nature Communications · 年份：2020 · DOI：10.1038/s41467-020-19985-2 · 被引用次数：154 · 研究领域：Supercapacitor Materials and Fabrication、Electrochemical sensors and biosensors、Graphene research and applications

Abstract Micro-supercapacitors are promising miniaturized energy storage devices that have attracted considerable research interest. However, their widespread use is limited by inefficient microfabrication technologies and their low energy density. Here, a flexible, designable micro-supercapacitor can be fabricated by a single pulse laser photonic-reduction stamping. A thousand spatially shaped laser pulses can be generated in one second, and over 30,000 micro-supercapacitors are produced within 10 minutes. The micro-supercapacitor and narrow gaps were dozens of microns and 500 nm, respectively. With the unique three-dimensional structure of laser-induced graphene based electrode, a single micro-supercapacitor exhibits an ultra-high energy density (0.23 Wh cm−3), an ultra-small time constant (0.01 ms), outstanding specific capacitance (128 mF cm−2 and 426.7 F cm−3) and a long-term cyclability. The unique technique is desirable for a broad range of applications, which surmounts current limitations of high-throughput fabrication and low energy density of micro-supercapacitors.