Boosting the Performance of Graphene Cathodes in Na-O 2 Batteries by Exploiting the Multifunctional Character of Small Biomolecules.

Autor: Enterría M; Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein, 48, Vitoria-Gasteiz, 01510, Spain., Gómez-Urbano JL; Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein, 48, Vitoria-Gasteiz, 01510, Spain.; Departamento de Química Inorgánica, Universidad del País Vasco UPV/EHU, P.O. Box 664, Bilbao, 48080, Spain., Munuera JM; Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, C/Francisco Pintado Fe 26, Oviedo, 33011, Spain., Villar-Rodil S; Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, C/Francisco Pintado Fe 26, Oviedo, 33011, Spain., Carriazo D; Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein, 48, Vitoria-Gasteiz, 01510, Spain.; IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain., Paredes JI; Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, C/Francisco Pintado Fe 26, Oviedo, 33011, Spain., Ortiz-Vitoriano N; Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein, 48, Vitoria-Gasteiz, 01510, Spain.; IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2021 Jan; Vol. 17 (2), pp. e2005034. Date of Electronic Publication: 2020 Dec 16.
DOI: 10.1002/smll.202005034
Abstrakt: Graphene aerogels derived from a biomolecule-assisted aqueous electrochemical exfoliation route are explored as cathode materials in sodium-oxygen (Na-O 2 ) batteries. To this end, the natural nucleotide adenosine monophosphate (AMP) is used in the multiple roles of exfoliating electrolyte, aqueous dispersant, and functionalizing agent to access high quality, electrocatalytically active graphene nanosheets in colloidal suspension (bioinks). The surface phenomena occurring on the electrochemically derived graphene cathode is thoroughly studied to understand and optimize its electrochemical performance, where a cooperative effect between the nitrogen atoms and phosphates from the AMP molecules is demonstrated. Moreover, the role of the nitrogen atoms in the adenine nucleobase of AMP and short-chain phosphate is unraveled. Significantly, the use of such cathodes with a proper amount of AMP molecules adsorbed on the graphene nanosheets delivers a discharge capacity as high as 9.6 mAh cm -2 and performs almost 100 cycles with a considerably reduced cell overpotential and a coulombic efficiency of ≈97% at high current density (0.2 mA cm -2 ). This study opens a path toward the development of environmentally friendly air cathodes by the use of natural nucleotides which offers a great opportunity to explore and manufacture bioinspired cathodes for metal-oxygen batteries.
(© 2020 The Authors. Small published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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