Finger Number and Device Performance: A Case Study of Reduced Graphene Oxide Microsupercapacitors
Journal article, 2021
Microsupercapacitors (MSCs) are recognized as suitable energy storage devices for the internet of things (IoTs) applications. Herein is described the work conducted to assess the areal energy and power densities of MSCs with 2, 10, 20, and 40 interdigital finger electrodes on a fixed device footprint area (the finger interspacing is fixed at 40 μm, and the finger width and length are allowed to vary to fit the footprint area). The MSCs are based on reduced graphene oxide (rGO) materials and fabricated with a spin-coating and etch method. The performance evaluation indicates a strong dependency of areal capacitance and energy density on the number of fingers, and the maximum (impedance match) power density is also influenced to a relatively large extent, whereas the average power density is not sensitive to the configuration parameters in the present evaluation settings (scan rate 20–200 mV s−1 and current density of 100 μA cm−2). For the rGO-based devices, the equivalent distributed resistance may play an important role in determining the device resistance and power-related performance.
device configuration
microsupercapacitors
reduced graphene oxide
areal energy density
areal power density
Author
Qi Li
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory
Anderson David Smith
Wallenberg Wood Science Center (WWSC)
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory
Agin Vyas
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory
F. Cornaglia
Alec Anderson
University of California
Mohammad Mazharul Haque
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory
Per Lundgren
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory
Peter Enoksson
Wallenberg Wood Science Center (WWSC)
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory
Physica Status Solidi (B): Basic Research
0370-1972 (ISSN) 1521-3951 (eISSN)
Vol. 258 2 2000354Subject Categories
Other Physics Topics
Energy Systems
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1002/pssb.202000354