Sustainable graphitic carbon materials from biogas as anodes for sodium-ion batteries
Novel graphitic materials of renewable origin, biogas-derived carbon nanofibers (BCNFs), are investigated as anodes for sodium-ion batteries in a glyme-based electrolyte. These materials show a unique combination of electrochemical properties, including suitable capacity (∼100 mAh g), high rate capability, excellent cycle stability and coulombic efficiency as well as long cycle life (∼6000 cycles up to 7.5 A g) which make them adequate candidates for this application. The sodiation of BCNFs occurs through different combinations of diffusion-controlled intercalation and capacitive intercalation processes. Overall, the quantitative contribution of the capacitive current to the total stored sodium in BCNF electrodes is noteworthy (28-71%), which account for their ultrahigh rate performance, comparable to that of supercapacitors, because of the improvement of the transportability of the Na ions through the graphene layers.
| Main Authors: | , , |
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| Other Authors: | |
| Format: | artículo biblioteca |
| Published: |
IOP Publishing
2019
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| Online Access: | http://hdl.handle.net/10261/224709 http://dx.doi.org/10.13039/501100003329 |
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