Jiayu Li, Haoxu Zhan, Bingjun Su, Yiqun Yao, Yiran He, Wu Zhang, Zeqiang Zhong, Lei Li, Dongyan Zhang, Hao Yang, Chao Li
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引用次数: 0
摘要
六氰合铁酸钠锰（又称普鲁士白（PW））因其高电压平台和廉价的元素组成而作为一种很有前景的纳离子电池阴极材料备受关注。然而，其寄生空位和水分子往往会降低电化学性能。在放大制备过程中如何适当调节这些缺陷仍是一个挑战。在这项工作中，PW 是在 10 L 反应器中通过草酸锰辅助水沉淀制备的。获得了高质量的 Na2.32Mn[Fe(CN)6]0.95□0.05-1.97 H2O，其比容量为 148 mAh g-1。首次报道了这种超富氮阴极在长期循环过程中从单斜面到斜方面的相变。此外，还进一步讨论了真空干燥温度，150 °C更适合实现脱水和电性能之间的平衡。
Scale-up Preparation of Na-Enriched Prussian White Cathode Assisted by Manganese Oxalate for Sodium-Ion Batteries.
Sodium manganese hexacyanoferrate, also called Prussian white (PW), has attracted much attention as a promising cathode material for Na-ion batteries due to its high-voltage platform and inexpensive elemental composition. However, their parasitic vacancies and water molecules often deteriorate the electrochemical performance. Proper regulation of such defects in scale-up preparation is still a challenge. In this work, PW was prepared via aqueous precipitation assisted by manganese oxalate in a 10 L reactor. High-quality Na2.32Mn[Fe(CN)6]0.95□0.05·1.97 H2O was obtained and exhibited a specific capacity of 148 mAh g-1. The phase transition from monoclinic to rhombohedral during long-term cycling for such an ultra-Na-rich cathode has been first reported. In addition, the vacuum drying temperature was further discussed, and 150 °C is more suitable for achieving the balance between dehydration and electrical properties.
期刊介绍：
Langmuir is an interdisciplinary journal publishing articles in the following subject categories:
Colloids: surfactants and self-assembly, dispersions, emulsions, foams
Interfaces: adsorption, reactions, films, forces
Biological Interfaces: biocolloids, biomolecular and biomimetic materials
Materials: nano- and mesostructured materials, polymers, gels, liquid crystals
Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry
Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals
However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do?
Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*.
This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).
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