A novel method capable of the rapid fabrication of cellulose nanofiber (CNF)-based supercapacitors using a femtosecond laser is demonstrated. When high-repetition femtosecond laser pulses were scanned onto the surface of a CNF film, a black-colored double-tracked structure was fabricated in the vicinity of the laser ablated groove. The black structure exhibited electrical conductivity, and was composed of graphitic carbon. By utilizing the electrically conductive graphitic carbon as electrodes with an electrolyte solution between the groove, the fabricated double-tracked structure exhibited capacitive properties.
Electrically-conductive-porous carbon was fabricated by the laser carbonization of bamboo and applied as the electrodes of a supercapacitor. Scanning electron microscopy revealed that the porosity of the formed structures was higher when slower scanning speeds were used. We fabricated an all-biomass-derived supercapacitor by covering the patterned porous carbon with agarose gel, which functioned as an electrolyte. Supercapacitors that show relatively higher capacitance were fabricated using slower scanning speeds, which could be attributable to a higher porosity of the electrodes. The proposed method is promising for the realization of sustainable energy-storage devices.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.