Sayle, TXTCaddeo, FMonama, Nkwe OKgatwane, KMNgoepe, PESayle, DC2021-11-192021-11-192015Sayle, T., Caddeo, F., Monama, N.O., Kgatwane, K., Ngoepe, P. & Sayle, D. 2015. Origin of electrochemical activity in nano-Li2MnO3; stabilization via a ‘point defect scaffold’. <i>Nanoscale, 3.</i> http://hdl.handle.net/10204/121642040-33642040-3372DOI https://doi.org/10.1039/C4NR05551Ahttp://hdl.handle.net/10204/12164Molecular dynamics (MD) simulations of the charging of Li2MnO3 reveal that the reason nanocrystalline-Li2MnO3 is electrochemically active, in contrast to the parent bulk-Li2MnO3, is because in the nanomaterial the tunnels, in which the Li ions reside, are held apart by Mn ions, which act as a pseudo ‘point defect scaffold’. The Li ions are then able to diffuse, via a vacancy driven mechanism, throughout the nanomaterial in all spatial dimensions while the ‘Mn defect scaffold’ maintains the structural integrity of the layered structure during charging. Our findings reveal that oxides, which comprise cation disorder, can be potential candidates for electrodes in rechargeable Li-ion batteries. Moreover, we propose that the concept of a ‘point defect scaffold’ might manifest as a more general phenomenon, which can be exploited to engineer, for example, two or three-dimensional strain within a host material and can be fine-tuned to optimize properties, such as ionic conductivity.AbstractenLi-ion batteriesMolecular dynamicsArticleSayle, T., Caddeo, F., Monama, N. O., Kgatwane, K., Ngoepe, P., & Sayle, D. (2015). Origin of electrochemical activity in nano-Li2MnO3; stabilization via a ‘point defect scaffold’. <i>Nanoscale, 3</i>, http://hdl.handle.net/10204/12164Sayle, TXT, F Caddeo, Nkwe O Monama, KM Kgatwane, PE Ngoepe, and DC Sayle "Origin of electrochemical activity in nano-Li2MnO3; stabilization via a ‘point defect scaffold’." <i>Nanoscale, 3</i> (2015) http://hdl.handle.net/10204/12164Sayle T, Caddeo F, Monama NO, Kgatwane K, Ngoepe P, Sayle D. Origin of electrochemical activity in nano-Li2MnO3; stabilization via a ‘point defect scaffold’. Nanoscale, 3. 2015; http://hdl.handle.net/10204/12164.TY - Article AU - Sayle, TXT AU - Caddeo, F AU - Monama, Nkwe O AU - Kgatwane, KM AU - Ngoepe, PE AU - Sayle, DC AB - Molecular dynamics (MD) simulations of the charging of Li2MnO3 reveal that the reason nanocrystalline-Li2MnO3 is electrochemically active, in contrast to the parent bulk-Li2MnO3, is because in the nanomaterial the tunnels, in which the Li ions reside, are held apart by Mn ions, which act as a pseudo ‘point defect scaffold’. The Li ions are then able to diffuse, via a vacancy driven mechanism, throughout the nanomaterial in all spatial dimensions while the ‘Mn defect scaffold’ maintains the structural integrity of the layered structure during charging. Our findings reveal that oxides, which comprise cation disorder, can be potential candidates for electrodes in rechargeable Li-ion batteries. Moreover, we propose that the concept of a ‘point defect scaffold’ might manifest as a more general phenomenon, which can be exploited to engineer, for example, two or three-dimensional strain within a host material and can be fine-tuned to optimize properties, such as ionic conductivity. DA - 2015 DB - ResearchSpace DP - CSIR J1 - Nanoscale, 3 KW - Li-ion batteries KW - Molecular dynamics LK - https://researchspace.csir.co.za PY - 2015 SM - 2040-3364 SM - 2040-3372 T1 - Origin of electrochemical activity in nano-Li2MnO3; stabilization via a ‘point defect scaffold’ TI - Origin of electrochemical activity in nano-Li2MnO3; stabilization via a ‘point defect scaffold’ UR - http://hdl.handle.net/10204/12164 ER -25109