电化学
拉曼光谱
降级(电信)
材料科学
电极
离子
化学工程
钠
溶胶凝胶
纳米技术
化学
计算机科学
物理化学
有机化学
光学
电信
物理
冶金
工程类
作者
Matteo Palluzzi,Laura Silvestri,Arcangelo Celeste,Mariarosaria Tuccillo,Alessandro Latini,Sergio Brutti
出处
期刊:Crystals
[MDPI AG]
日期:2022-06-22
卷期号:12 (7): 885-885
被引量:6
标识
DOI:10.3390/cryst12070885
摘要
In this manuscript, we report an extensive study of the physico-chemical properties of different samples of O3-NaMnO2, synthesized by sol–gel and solid state methods. In order to successfully synthesize the materials by sol–gel methods a rigorous control of the synthesis condition has been optimized. The electrochemical performances of the materials as positive electrodes in aprotic sodium-ion batteries have been demonstrated. The effects of different synthesis methods on both structural and electrochemical features of O3-NaMnO2 have been studied to shed light on the interplay between structure and performance. Noticeably, we obtained a material capable of attaining a reversible capacity exceeding 180 mAhg−1 at 10 mAg−1 with a capacity retention >70% after 20 cycles. The capacity fading mechanism and the structural evolution of O3-NaMnO2 upon cycling have been extensively studied by performing post-mortem analysis using XRD and Raman spectroscopy. Apparently, the loss of reversible capacity upon cycling originates from irreversible structural degradations.
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