P2-NaCo(0.5)Mn(0.5)O2 as a Positive Electrode Material for Sodium-Ion Batteries

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
Peilei YangFei Du

Abstract

As a promising positive electrode material for sodium-ion batteries (SIBs), layered sodium oxides have attracted considerable attention in recent years. In this work, stoichiometric P2-phase NaCo(0.5)Mn(0.5)O2 was prepared through the conventional solid-state reaction, and its structural and physical properties were studied in terms of XRD, XPS, and magnetic susceptibility. Furthermore, the P2-NaCo(0.5)Mn(0.5)O2 electrode delivered a discharge capacity of 124.3 mA h g(-1) and almost 100% initial coulombic efficiency over the potential window of 1.5-4.15 V. It also showed good cycle stability, with a reversible capacity and capacity retention reaching approximately 85 mA h g(-1) and 99%, respectively, at the 5 C rate after 100 cycles. Additionally, cyclic voltammetry and ex situ XRD were employed to explain the electrochemical behavior at the different electrochemical stages. Owing to the applicable performances, P2-NaCo(0.5)Mn(0.5)O2 can be considered as a potential positive electrode material for SIBs.

References

Dec 15, 2010·Nature Materials·R BerthelotC Delmas
Aug 16, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·D CarlierC Delmas
Nov 13, 2014·Chemical Reviews·Naoaki YabuuchiShinichi Komaba
Feb 19, 2015·ACS Applied Materials & Interfaces·Ivana HasaJusef Hassoun

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Citations

Mar 30, 2017·Chemical Society Reviews·Jang-Yeon HwangYang-Kook Sun

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