Dependence of Young's modulus on the sodium content within the structural tunnels of a one-dimensional Na-ion battery cathode

We report on the Young's modulus (YM) of single-crystalline Na 4 Mn 9 O 18 (or Na 0.44 MnO 2 ) nanowires (NWs), which have shown promise as reversible sodium-ion (Na + ) intercalation cathodes with high capacity and excellent cyclability. In addition, acid treatment of this material yielded pro...

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Bibliographic Details
Published in:Nanoscale 2015-11, Vol.7 (42), p.17642-17648
Main Authors: Maksud, M, Palapati, N. K. R, Byles, B. W, Pomerantseva, E, Liu, Y, Subramanian, A
Format: Article
Language:English
Subjects:
Battery
Cathodes
Crystal structure
Modulus of elasticity
Nanowires
Rechargeable batteries
Sodium
Tunnels (transportation)
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Summary:We report on the Young's modulus (YM) of single-crystalline Na 4 Mn 9 O 18 (or Na 0.44 MnO 2 ) nanowires (NWs), which have shown promise as reversible sodium-ion (Na + ) intercalation cathodes with high capacity and excellent cyclability. In addition, acid treatment of this material yielded proton stabilized Na 0.44− y MnO 2 ( y ∼ 0.23) NWs with a 74% increase in the YM. The tight correlation between YM and ionic content within the crystalline tunnels is particularly significant, since it points to the strong dependence of elastic properties on state-of-charge (SOC) within battery materials. The Young's modulus of manganese oxide-based intercalation cathodes exhibits a strong correlation with the ionic content inside its structural tunnels.
ISSN:2040-3364
2040-3372
DOI:10.1039/c5nr06557g