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

M Maksud; N K R Palapati; B W Byles; E Pomerantseva; Y Liu; A Subramanian

doi:10.1039/c5nr06557g

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

Nanoscale. 2015 Nov 14;7(42):17642-8. doi: 10.1039/c5nr06557g.

Authors

M Maksud¹, N K R Palapati¹, B W Byles², E Pomerantseva², Y Liu³, A Subramanian¹

Affiliations

¹ Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA. asubramanian@vcu.edu.
² Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA.
³ Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27606, USA.

PMID: 26458333
DOI: 10.1039/c5nr06557g

Abstract

We report on the Young's modulus (YM) of single-crystalline Na4Mn9O18 (or Na0.44MnO2) 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)MnO2 (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.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.