Choi, Yong-Seok Byeon, Young-Woon Ahn, Jae-Pyoung Lee, Jae-Chul 2024-01-20T02:30:46Z 2024-01-20T02:30:46Z 2021-09-01 2017-02 1530-6984 https://pubs.kist.re.kr/handle/201004/123162 Despite their large theoretical storage capability, Na-Sn batteries exhibit poor round-trip energy efficiencies as compared to Li-Si batteries. Here, we report the results of a comprehensive study to elucidate how and why Na-Sn batteries exhibit such a low energy efficiency. As a convincing evidence for this behavior, we observed that the resistivity of the Sn anode increased by 8 orders of magnitude during in situ sodiation experiments, which is attributed to the formation of electrically resistive Zintl ions in the sodiated Sn. Continual sodiation induced the development of residual stresses at the Sn anode and caused the distortion of Zintl ions from their ideal configuration. This distortion caused a change in the electronic structure, resulting in the increased resistivity of the sodiated Sn. Our findings offer some solutions that can be used to improve the energy efficiency of Na-Sn batteries. English AMER CHEMICAL SOC SODIUM-ION ELECTRICAL-RESISTIVITY STORAGE PSEUDOPOTENTIALS NANOPARTICLES EQUILIBRIUM CHALLENGES LITHIATION INSERTION ELECTRODE Formation of Zintl Ions and Their Configurational Change during Sodiation in Na-Sn Battery Article 10.1021/acs.nanolett.6b03690 1 NANO LETTERS, v.17, no.2, pp.679 - 686 NANO LETTERS 17 2 679 686 scie scopus 000393848800012 2-s2.0-85012016425 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article SODIUM-ION ELECTRICAL-RESISTIVITY STORAGE PSEUDOPOTENTIALS NANOPARTICLES EQUILIBRIUM CHALLENGES LITHIATION INSERTION ELECTRODE Na-ion battery resistivity in situ sodiation experiment ab initio simulation FEM Zintl ion