煅烧
X射线光电子能谱
材料科学
拉曼光谱
扫描电子显微镜
法拉第效率
电化学
退火(玻璃)
阴极
光谱学
分析化学(期刊)
化学工程
电极
化学
光学
物理化学
催化作用
复合材料
生物化学
物理
量子力学
色谱法
工程类
作者
Z. Mahmud,Fahad Munshe,Subrata Karmakar,Munira Sultana,Ariful Haque,K. Ghosh
标识
DOI:10.1016/j.matchemphys.2023.128865
摘要
Due to the accessibility of raw materials and good cost-effectiveness, Sodium-ion batteries (SIB) are a possible replacement for lithium-ion batteries. The subject of this paper is the layered P2-type NaxMnO2-δ nanostructure which was synthesized by a solid-state process and annealed in an Ar–H2 atmosphere at various calcination temperatures. X-ray diffraction, Raman spectroscopy, Scanning electron microscopy, Ultraviolet–visible spectroscopy, and X-ray photoelectron spectroscopy were used to describe the cathode material's crystalline structure, vibrational analysis, surface morphology, elemental composition, optical properties, and electrochemistry performance. The calcination temperature significantly affects the structural, optical, and electrochemical characteristics of layered P2-type NaxMnO2-δ material. After 20 cycles, the reduction annealing of 400 °C has the highest specific discharge capacity of 130 mAhg−1 at C/10 where capacity retention is 98.84 % and average coulombic efficiency of 98.37 % in between 2.0 and 4.2 V range (Na+/Na).
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