Lee, Yeong A. Lim, Joel Cho, Younghyun Lee, Hyub Park, Sangbaek Lee, Go-Woon Yoo, Chung-Yul Park, Sang Hyun Murukeshan, Vadakke Matham Kim, Seungchul Kim, Young-jin Yoon, Hana 2024-01-19T17:34:20Z 2024-01-19T17:34:20Z 2021-09-05 2020-04-15 1385-8947 https://pubs.kist.re.kr/handle/201004/118722 For powering wearable electronics, extensive research has been directed toward microscale flexible and stretchable energy-storage devices. Microsupercapacitors, though promising candidates, remain limited in terms of design flexibility, scalability, reusability, and compatibility with general substrates. This paper reports a high-performance sticker-type flexible microsupercapacitor using highly swollen reduced-graphene-oxide electrodes fabricated by an ultrashort-pulse laser to promote full active-site and durability of the electrodes. Our sticker-type flexible micropseudocapacitor provides a comparable volumetric energy density of 1.08 mWh cm(-3) and 13 times higher volumetric power density of 83.5 mW cm(-3) compared to conventional lithium thin-film batteries. Bio-inspired surface modifications are additionally applied to the reduced-graphene-oxide electrodes, which provides a six-fold increase (10.38 mF cm(-2)) of the areal capacitance. A 6 x 2 micropseudocapacitor array embedded in a sub-millimeter thin PDMS film adheres to safety goggles and successfully powers a mu-LED. The total capacitance of the array is maintained at similar to 97% of its original value after 200 repetitive attachments and detachments showing good durability. In addition, the sticker-type micropseudocapacitor array shows a stable performance under repeated deformation, and up to similar to 99% of capacitance retention after 200 bending cycles. This novel re-attachable flexible micropseudocapacitor will expedite the widespread use of flexible and wearable devices. English ELSEVIER SCIENCE SA ALL-SOLID-STATE POROUS CARBON NANOSHEETS MICRO-SUPERCAPACITORS POLYDOPAMINE MICROSUPERCAPACITORS FABRICATION OXIDE FILMS CHIP COMPOSITES Attachable micropseudocapacitors using highly swollen laser-induced-graphene electrodes Article 10.1016/j.cej.2019.123972 1 CHEMICAL ENGINEERING JOURNAL, v.386 CHEMICAL ENGINEERING JOURNAL 386 scie scopus 000551293900006 2-s2.0-85077698779 Engineering, Environmental Engineering, Chemical Engineering Article ALL-SOLID-STATE POROUS CARBON NANOSHEETS MICRO-SUPERCAPACITORS POLYDOPAMINE MICROSUPERCAPACITORS FABRICATION OXIDE FILMS CHIP COMPOSITES Microsupercapacitor Pseudocapacitor Laser direct writing Laser-induced graphene Attachable energy storage device