Unraveling the Anion Storage Properties of Manganese-Doped SrTiO<sub>3</sub>
Strontium titanate (STO), a cubic perovskite material, has gained recent attention as a supercapacitor active material with its pseudocapacitive energy storage attributed to anion intercalation. However, very few in-depth studies have been conducted to understand the anion storage properties of STO and its metal-doped derivative compounds. In this study, we explored the anion-insertion storage mechanism of Mn-doped strontium titanate (Mn-STO) compared to pristine STO. The polycrystalline Mn-STO, synthesized via solid-state reaction, showed 3-fold times higher electrochemical surface area and exhibited enhanced anion storage compared to pristine STO. Detailed anion kinetics and diffusion studies reveal that the anion storage in Mn-STO is dominated by the bulk diffusion-controlled pseudocapacitive process than in STO. Further, the supercapacitor fabricated with Mn-STO in a 3 M KOH aqueous electrolyte with 0.1 M MnSO<sub>4</sub> additives demonstrated excellent cycling stability, retaining 100% capacitance after 10,000 cycles, highlighting the potential of Mn-STO as an electrode material for supercapacitor applications.
Authors
- Susanta Sinha Roy (ORCID: https://orcid.org/0000-0001-5078-8877)
- Binson Babu (ORCID: https://orcid.org/0000-0002-4275-2740)
- Dushyant Sharma (ORCID: https://orcid.org/0000-0003-2432-7211)
Institutions
- Shiv Nadar University (IN)
Publication Details
- Journal
- ACS Omega
- Published
- 2024-11-15
- DOI
- https://doi.org/10.1021/acsomega.4c08911
- Citations
- 7
- Primary Topic
- Supercapacitor Materials and Fabrication
- Type
- article
- Field-Weighted Citation Impact
- 0.83
Funders
- Department of Science and Technology, Ministry of Science and Technology, India
- Shiv Nadar University