title: Comparison between Na-Ion and Li-Ion Cells: Understanding the Critical Role of the Cathodes Stability and the Anodes Pretreatment on the Cells Behavior.
abstract: The electrochemical behavior of Na-ion and Li-ion full cells was investigated, using hard carbon as the anode material, and NaNi0.5Mn0.5O2 and LiNi0.5Mn0.5O2 as the cathodes. A detailed description of the structure, phase transition, electrochemical behavior and kinetics of the NaNi0.5Mn0.5O2 cathodes is presented, including interesting comparison with their lithium analogue. The critical effect of the hard carbon anodes pretreatment in the total capacity and stability of full cells is clearly demonstrated. Using impedance spectroscopy in three electrodes cells, we show that the full cell impedance is dominated by the contribution of the cathode side. We discuss possible reasons for capacity fading of these systems, its connection to the cathode structure and relevant surface phenomena.
authors.affiliation: Chemistry Department, Bar-Ilan University , Ramat-Gan 5290002, Israel.
authors.forename: Ezequiel
authors.initials: E
authors.lastname: de la Llave
authors.affiliation: Chemistry Department, Bar-Ilan University , Ramat-Gan 5290002, Israel.
authors.forename: Valentina
authors.initials: V
authors.lastname: Borgel
authors.affiliation: Department of Energy Engineering, Hanyang University , Seoul 133-791, Republic of Korea.
authors.forename: Kang-Joon
authors.initials: KJ
authors.lastname: Park
authors.affiliation: Department of Energy Engineering, Hanyang University , Seoul 133-791, Republic of Korea.
authors.forename: Jang-Yeon
authors.initials: JY
authors.lastname: Hwang
authors.affiliation: Department of Energy Engineering, Hanyang University , Seoul 133-791, Republic of Korea.
authors.forename: Yang-Kook
authors.initials: YK
authors.lastname: Sun
authors.affiliation: BASF SE , Ludwigshafen 67056, Germany.
authors.forename: Pascal
authors.initials: P
authors.lastname: Hartmann
authors.affiliation: BASF SE , Ludwigshafen 67056, Germany.
authors.forename: Frederick-Francois
authors.initials: FF
authors.lastname: Chesneau
authors.affiliation: Chemistry Department, Bar-Ilan University , Ramat-Gan 5290002, Israel.
authors.forename: Doron
authors.initials: D
authors.lastname: Aurbach
mesh_terms: D058266:Dielectric Spectroscopy; D004058:Diffusion; D017097:Electric Impedance; D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D007477:Ions; D008094:Lithium / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D012964:Sodium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D007477:Ions; D008094:Lithium; D012964:Sodium
keywords: Li intercalation; Li ion batteries; LiMn0.5Ni0.5O2; Na intercalation; Na ion batteries; NaMn0.5Ni0.5O2; cathodes