Finger Number and Device Performance: A Case Study of Reduced Graphene Oxide Microsupercapacitors
Journal article, 2020

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.

areal power density

device configuration

microsupercapacitors

areal energy density

reduced graphene oxide

Author

Qi Li

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Anderson David Smith

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Wallenberg Wood Science Center (WWSC)

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. In Press

Subject Categories

Other Physics Topics

Energy Systems

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1002/pssb.202000354

More information

Latest update

11/6/2020