1. Scrutinizing the charge storage mechanism in SrO based composites for asymmetric supercapacitors by diffusion-controlled process
- Author
-
Syed Shabhi Haider, Sana Zakar, Muhammad Tayyab, Meshal Alzaid, Sikandar Aftab, Amir Muhammad Afzal, and Muhammad Zahir Iqbal
- Subjects
Materials science ,Materials Science (miscellaneous) ,Oxide ,Nanochemistry ,02 engineering and technology ,010402 general chemistry ,Electrochemistry ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,law ,Polyaniline ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Composite material ,Strontium oxide ,Supercapacitor ,Graphene ,Cell Biology ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,chemistry ,Electrode ,0210 nano-technology ,Biotechnology - Abstract
Optimization of suitable electrode material flashing high electrochemical performance is the main hindrance in energy storage applications. Metal oxide-based electrode materials are promising candidate which greatly promotes the sustainable development. Herein, strontium oxide (SrO) is synthesized from sonochemical method followed by calcination. Incorporating polyaniline (PANI) and graphene (Gr) intensify the materials performance. Three asymmetric devices are designed using SrO, its composites (SrO/PANI and SrO/PANI/Gr) and activated carbon (AC) as an electrode and electrolyte-soaked separators are sandwiched in solidly packed cell assembly. Electrochemical measurements are performed to scrutinize the inherent properties. After that, Dunn’s model is applied to evaluate the capacitive and diffusion-controlled contributions. The obtained result divulges that SrO/PANI/Gr//AC exhibits more diffusive-controlled contribution and reveals a battery type behavior due to the contribution of PANI in redox reactions. Thus, this work delivers a route to synthesize metal oxides-based composites and a systematic approach to analyze the charge storage mechanism in asymmetric supercapacitors.
- Published
- 2020
- Full Text
- View/download PDF