Role of the electrode-edge in optically sensitive three-dimensional carbon foam-MoS2 based high-performance micro-supercapacitors

Sumana Kumar, Anwesha Mukherjee, Swanand Telpande, Ayon Das Mahapatra, Praveen Kumar, Abha Misra*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Developing high-performance micro-supercapacitors in a limited footprint area is important for miniaturized electronics, where enhancement in energy storage per unit area is critical. In this study, we used zig-zag edge based interdigitated electrodes for the micro-supercapacitor. The novel electrode geometry contributes to improved electrochemical capacitance, energy density, and power density compared to planar edge interdigitated electrodes. The zig-zag edges of the electrodes induce stronger electric field intensity between the interdigitated fingers contributing to enhanced charge storage capacity. A simulation study further confirmed the enhanced electric field intensity. A layered molybdenum disulfide (MoS2) nanostructure directly grown on a three-dimensional scaffold of carbon foam (CF) is used as the electrode material. The novel zig-zag interdigitated electrode geometry demonstrated an areal capacitance of 21 mF cm−2, which is 242% (or ∼350% enhancement while considering electrode interdigitated finger area only) higher than that of the planar edge electrodes using the same material. Moreover, the optically sensitive CF-MoS material resulted in an optically chargeable supercapacitor upon illumination with 600 nm radiation, where a self-powered voltage generation is observed. The study provides broad future prospects for combining electrode design and optically sensitive materials for enhanced charge storage in micro-supercapacitors. Thus, the study demonstrated a promising route to design efficient planar supercapacitor devices for miniaturized electronics and self-powered devices.

Original languageEnglish
Pages (from-to)4963-4976
Number of pages14
JournalJournal of Materials Chemistry A
Issue number10
StatePublished - 26 Jan 2023
Externally publishedYes


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