The limited Na-storage capacity of graphite anodes for sodium-ion batteries (∼110 mAh g−1) is significantly enhanced by the incorporation of nanosized Sn (17 wt%). The composite (SntGraphite), prepared by simple annealing of graphite with SnCl2, shows a specific capacity of 223 mAh g−1 (at 50 mA g−1) combined with excellent cycle life (i. e., 96 % of capacity retention after 2,200 cycles at 1 A g−1) and initial Coulomb efficiency (90 %). The combined storage of sodium in graphite (by solvent co-intercalation) and Sn (by alloy formation) is followed by in situ X-ray diffraction and in situ electrochemical dilatometry (ECD). While the additional tin almost doubles the electrode capacity, its contribution to the electrode expansion (∼3 %) is surprisingly small. The use of SntGraphite as anode for sodium-ion hybrid capacitors with activated carbon as cathode provides a maximum energy and power density of ∼93 Wh kg−1 and 7.8 kW kg−1, with a capacity retention of ∼80 % after 8,000 cycles. © 2020 The Authors. Published by Wiley-VCH GmbH

Tin-containing graphite for sodium-ion batteries and hybrid capacitors / Palaniselvam, T.; Babu, B.; Moon, H.; Hasa, I.; Santhosha, A. L.; Goktas, M.; Sun, Y. -N.; Zhao, L.; Han, B. -H.; Passerini, S.; Balducci, A.; Adelhelm, P.. - In: BATTERIES & SUPERCAPS. - ISSN 2566-6223. - 4:1(2021), pp. 173-182. [10.1002/batt.202000196]

Tin-containing graphite for sodium-ion batteries and hybrid capacitors

Hasa, I.;Passerini, S.;
2021

Abstract

The limited Na-storage capacity of graphite anodes for sodium-ion batteries (∼110 mAh g−1) is significantly enhanced by the incorporation of nanosized Sn (17 wt%). The composite (SntGraphite), prepared by simple annealing of graphite with SnCl2, shows a specific capacity of 223 mAh g−1 (at 50 mA g−1) combined with excellent cycle life (i. e., 96 % of capacity retention after 2,200 cycles at 1 A g−1) and initial Coulomb efficiency (90 %). The combined storage of sodium in graphite (by solvent co-intercalation) and Sn (by alloy formation) is followed by in situ X-ray diffraction and in situ electrochemical dilatometry (ECD). While the additional tin almost doubles the electrode capacity, its contribution to the electrode expansion (∼3 %) is surprisingly small. The use of SntGraphite as anode for sodium-ion hybrid capacitors with activated carbon as cathode provides a maximum energy and power density of ∼93 Wh kg−1 and 7.8 kW kg−1, with a capacity retention of ∼80 % after 8,000 cycles. © 2020 The Authors. Published by Wiley-VCH GmbH
2021
sodium-ion battery; anode; graphite; tin; hybrid capacitor
01 Pubblicazione su rivista::01a Articolo in rivista
Tin-containing graphite for sodium-ion batteries and hybrid capacitors / Palaniselvam, T.; Babu, B.; Moon, H.; Hasa, I.; Santhosha, A. L.; Goktas, M.; Sun, Y. -N.; Zhao, L.; Han, B. -H.; Passerini, S.; Balducci, A.; Adelhelm, P.. - In: BATTERIES & SUPERCAPS. - ISSN 2566-6223. - 4:1(2021), pp. 173-182. [10.1002/batt.202000196]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1588021
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