"Carbon-based nanomaterials towards electrochemical energy storage"

Nanostructured multi-dimensional carbon materials feature in a myriad of energy-based applications ranging from electrocatalysts to supercapacitors and sensors to batteries. This is primarily because the environment-friendly, cost-effective, and well-conducting carbon-based materials possess excellent characteristics towards efficient electrochemical energy conversion and storage. Studies suggest that the electrochemistry of carbon can be significantly altered (or enhanced) by fine-tuning its physical structure and through the incorporation of active surface functional groups and electroactive metal oxides. Herein, the interesting electrochemistry of 2D reduced graphene oxide (a non-stoichiometric carbon, oxygen-based layered structure) and CeO2-x quantum dot (QD) decorated ZIF-derived nitrogen-doped 3D hollow, porous carbon structure towards electrochemical energy storage is discussed. The electrochemical reduction of graphene oxide to graphene slowly changes the surface functionalities causing a gradual enhancement of the specific capacitance (a measure of the electrochemical charge storage). At the same time, the uniform decoration of fine-tuned CeO2-x QDs quite interestingly improves the charge storage properties of the bare porous hollow 3D carbon substrate by 3 times. The systematic investigation on these two different forms of exotic 2D/3D carbon nanostructures offers significant insight to their fundamental electrochemistry and along with providing novel strategies to enhance their energy storage properties.

Referencias:

1. T. Kar, S. Godavarthi, S. K. K. Pasha, K. Deshmukh, L. M.-Gómez, and M. K. Kesarla, Layered materials and their heterojunctions for supercapacitor applications: A review, Critical Reviews in Solid State and Material Science, 2021, 1–32.

2. T. Kar, R. Devivaraprasad, R. K. Singh, B. Bera, and M. Neergat, Reduction of graphene oxide – A comprehensive electrochemical investigation in alkaline and acidic electrolytes, RSC Advances, 4, 57781–57790, 2014. 

3. T. Kar, M. Casales-Díaz, J. J. Ramos-Hernández, O. Sotelo-Mazón, J. Henao, S. V. Rodríguez, S. Godavarthi, S. Liu, Y. Yamauchi, and M. K. Kesarla, CeO2−x quantum dots decorated nitrogen-doped hollow porous carbon for supercapacitors, Journal of Colloid and Interface Science, 2022. DOI: 10.1016/j.jcis.2022.04.114

Transmisión vía Youtube en: bit.ly/YouTube_ICF

Participante: ICF-UNAM

Institución: Dr. Tathagata Kar

Fecha y hora: Este evento terminó el Miércoles, 04 de Mayo de 2022