2024-03-29T14:29:44Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2247302020-12-15T03:36:27Zcom_10261_84com_10261_5col_10261_337
2020-12-14T09:50:38Z
urn:hdl:10261/224730
Graphitic carbon foams as anodes for sodium-ion batteries in glyme-based electrolytes
Rodríguez García, Jorge
Cameán Martínez, Ignacio
Ramos Alonso, Alberto
Rodríguez Vázquez, Elena
García Suárez, Ana Beatriz
Ministerio de Economía y Competitividad (España)
Sodium-ion battery
Graphitic carbon foam anode
Glyme-based electrolyte
Sodium storage mechanism
High-rate capability
The electrochemical performance as potential anodes for sodium-ion batteries of boron-doped and non-doped graphitic carbon foams is investigated by galvanostic cycling versus Na/Na at different electrical current densities, in glyme-based electrolytes which are known to allow the intercalation of the Na ions into graphite. The influence of materials composition and graphitic degree on battery parameters is firstly determined and further discussed by analyzing the mechanism of the electrochemical storage of Na ions into these materials which was found to occur through different combinations of pseudocapacitive intercalation and diffusion-controlled intercalation processes. In summary, the results of this study have demonstrated that graphitic carbon foams match a very acceptable capacity with excellent cycle stability as well as performance at high electrical current densities (up to ∼ 90 mAh g after 300 cycles at 1.9 A g with coulombic efficiency ∼ 100%) which make them suitable for sodium-ion battery applications. Overall, the increase of the interlayer spacing between the graphene layers and the presence of boron promote the pseudocapacitive intercalation which is responsible for the remarkable rate performance of these materials, whereas the improvement of diffusion-controlled intercalation capacity is mainly related to larger boron content.
2020-12-14T09:50:38Z
2020-12-14T09:50:38Z
2018
2020-12-14T09:50:39Z
artículo
Electrochimica Acta 270: 236- 244 (2018)
http://hdl.handle.net/10261/224730
10.1016/j.electacta.2018.03.084
http://dx.doi.org/10.13039/501100003329
Postprint
http://dx.doi.org/10.1016/j.electacta.2018.03.084
Sí
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ENE2014-52189-C2-2-R
https://creativecommons.org/licenses/by-nc-nd/4.0/
openAccess
Elsevier