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.
Bibliographical noteFunding Information:
The research was supported by the National Key R&D Program of China (Grant No. 2017YFB1104300), the Outstanding Youth Science Foundation of China (Grant No. 51922005) and National Natural Science Foundation of China (Grant No. 51775047).
© 2020, The Author(s).
Copyright 2021 Elsevier B.V., All rights reserved.
PubMed: MeSH publication types
- Journal Article