This study introduces a successful modification of the bipolar electrochemistry (BPE) method to efficiently produce and deposit high-quality reduced graphene oxide onto a conductive substrate. This innovative approach integrates material production and device fabrication into a single-step process that is straightforward, controllable, cost-efficient, and environmentally friendly. Microstructural analysis of the deposited material reveals the formation of oriented graphene sheets on the substrate. For micro-supercapacitor fabrication, interdigitated gold microelectrode arrays are generated through regular photolithography and subsequently employed as the conductive substrate in the BPE process. The electrochemical assessment of the fabricated device through cyclic voltammetry and galvanostatic charge/discharge verifies its outstanding specific areal capacitance. Notably, electrochemical impedance spectroscopy unveils exceptional high-frequency responses, promising potential applications in AC/DC filter systems. A comprehensive presentation of the detailed results will be delivered at the upcoming conference.
We study the non-exponential, power-law charge/voltage-time behavior of a supercapacitor when it is discharged into a constant resistive load. The standard evolution equation dn(t)=dt = -λn(t) where λ is an inverse time constant and n(t) can represent here charge or voltage is modifed instead to be dn(t)=dt = -λ[n(t)]q relating the rate of change of n(t) to a power law function of n(t). This leads to the q-exponential function which shows much better fitting capability to the experimental results obtained on a commercial capacitive device when compared with the traditional exponential decay.
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.