Optimizing the Performance of a Graphitized Carbon Xerogel as Cathode for Sodium Dual-Ion Batteries

The objective of this study is to optimize the performance of a graphitized carbon xerogel doped with graphene oxide (GXGO) as cathode for sodium dual-ion batteries. Carbon xerogels are synthetic materials produced in large amounts, with well-controlled chemistry, porosity and structure, by a simple and fast microwave process that has been scaled-up. The intercalation of PF6− anions from various NaPF6 salt-based electrolytes in a GXGO-based cathode is investigated by considering the influence of the upper cut-off voltage (UCOV) and of the electrolyte on the electrochemical parameters. The best results were attained in an electrolyte with a 2.0 M NaPF6 concentration in EC : EMC carbonate solvent mixture with added FEC, at a UCOV of 5.0 V. GXGO cathode provides a discharge capacity of 47 mAh g−1 after 2500 cycles with a coulombic efficiency of 97 %. Moreover, it shows great cycling stability and capacity retention of essentially 100 % after the initial cycles.

Bibliographic Details

Main Authors:	Cameán Martínez, Ignacio, Lobato Ortega, Belén, Rey Raap, Natalia, Santos-Gómez, Lucía dos, Flores López, Samantha Lizzette, Arenillas de la Puente, Ana, García Suárez, Ana Beatriz
Other Authors:	Ministerio de Ciencia e Innovación (España)
Format:	artículo biblioteca
Language:	English
Published:	John Wiley & Sons 2023-04-03
Subjects:	Sodium dual-ion battery, Carbon xerogel, Cathode, PF6 − anion intercalation, http://metadata.un.org/sdg/7, http://metadata.un.org/sdg/9, Ensure access to affordable, reliable, sustainable and modern energy for all, Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation,
Online Access:	http://hdl.handle.net/10261/340598 http://dx.doi.org/10.13039/501100004837 http://dx.doi.org/10.13039/100011941 https://api.elsevier.com/content/abstract/scopus_id/85150744163
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