title: Dependence of Young's modulus on the sodium content within the structural tunnels of a one-dimensional Na-ion battery cathode.
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.
authors.affiliation: Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA. asubramanian@vcu.edu.
authors.forename: M
authors.initials: M
authors.lastname: Maksud
authors.affiliation: Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA. asubramanian@vcu.edu.
authors.forename: N K R
authors.initials: NK
authors.lastname: Palapati
authors.affiliation: Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA.
authors.forename: B W
authors.initials: BW
authors.lastname: Byles
authors.affiliation: Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA.
authors.forename: E
authors.initials: E
authors.lastname: Pomerantseva
authors.affiliation: Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27606, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA. asubramanian@vcu.edu.
authors.forename: A
authors.initials: A
authors.lastname: Subramanian