| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage VI
|
| Presentation Title |
E-10: A BiVO4-RGO Bilayer Electrode based Photoelectrochemical Supercapacitor |
| Author(s) |
Anirban Roy, Pavel Majumdar, Krishnendu Pramanik, Hiranmay Saha |
| On-Site Speaker (Planned) |
Pavel Majumdar |
| Abstract Scope |
A single photo-capacitive bilayer electrode using BiVO4-RGO was fabricated to develop a photoelectrochemical supercapacitor, integrating photoelectric conversion and energy storage. The capacitive behavior of the electrode was initially studied by cyclic voltammetry and galvanostatic charge-discharge. The BiVO4-RGO electrode displayed typical EDLC behavior and good performance as a supercapacitor exhibiting a specific capacitance of 141.8F.g-1 measured at a current density of 0.2A.g-1 demonstrating BiVO4’s facile charge transfer capability during electrical charging and discharging operations. Subsequently, the bilayer electrode was assembled into a photo-supercapacitor which was photocharged in the open circuit condition, generating a photovoltage of 340mV and capable of delivering a specific discharge capacity of 4.1mAh.g-1, the highest reported value for such electrode configuration till-date. In order to gain more insight about the charge transfer mechanism across the electrode-electrolyte interface, electrochemical impedance spectroscopic analysis was performed for the BiVO4-RGO bilayer electrode under dark and light conditions, along with a durability test. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |