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钴普鲁士蓝类似物氧化过程中的原位红外光谱

In situ IR spectroscopy during oxidation process of cobalt Prussian blue analogues.

作者信息

Niwa Hideharu, Moriya Toshiaki, Shibata Takayuki, Fukuzumi Yuya, Moritomo Yutaka

机构信息

Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, 305-8571, Japan.

Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, 305-8571, Japan.

出版信息

Sci Rep. 2021 Feb 18;11(1):4119. doi: 10.1038/s41598-021-83699-8.

DOI:10.1038/s41598-021-83699-8
PMID:33603152
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7892820/
Abstract

Cobalt Prussian blue analogues (Co-PBA; NaCo[Fe(CN)]), consisting of cyano-bridged transition metal network, -Fe-CN-Co-NC-Fe-, are promising cathode materials for Na-ion secondary batteries. In the oxidation process, oxidization of Fe and/or Co are compensated by Na deintercalation. Here, we investigated the oxidization process of three Co-PBAs by means of in situ infrared absorption (IR) spectroscopy. With use of an empirical rule of the frequencies of the CN stretching mode in ferrocyanide ([Fe(CN)]) and ferricyanide ([Fe(CN)]), the oxidation processes of Co-PBAs were determined against the Fe concentration (y) and temperature (T). We will discuss the interrelation between the oxidation processes and Fe concentration (y).

摘要

钴普鲁士蓝类似物（Co-PBA；NaCo[Fe(CN)]）由氰基桥联的过渡金属网络-Fe-CN-Co-NC-Fe-组成，是有前景的钠离子二次电池正极材料。在氧化过程中，Fe和/或Co的氧化通过Na脱嵌来补偿。在此，我们通过原位红外吸收（IR）光谱研究了三种Co-PBA的氧化过程。利用亚铁氰化物（[Fe(CN)]）和铁氰化物（[Fe(CN)]）中CN伸缩模式频率的经验规则，确定了Co-PBA的氧化过程与Fe浓度（y）和温度（T）的关系。我们将讨论氧化过程与Fe浓度（y）之间的相互关系。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/6f19b501b2df/41598_2021_83699_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/0972aecff81d/41598_2021_83699_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/276dc4614f3a/41598_2021_83699_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/d3fd428a576a/41598_2021_83699_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/8c5a57c15fea/41598_2021_83699_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/183ac1e499b6/41598_2021_83699_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/6f19b501b2df/41598_2021_83699_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/0972aecff81d/41598_2021_83699_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/276dc4614f3a/41598_2021_83699_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/d3fd428a576a/41598_2021_83699_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/8c5a57c15fea/41598_2021_83699_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/183ac1e499b6/41598_2021_83699_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d4c0/7892820/6f19b501b2df/41598_2021_83699_Fig6_HTML.jpg

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本文引用的文献

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