过电位
拉曼光谱
星团(航天器)
氟化物
化学
电池(电)
原位
成核
纳米技术
离子键合
化学工程
无机化学
电化学
离子
材料科学
物理化学
电极
有机化学
光学
功率(物理)
工程类
物理
程序设计语言
量子力学
计算机科学
作者
Toshiro Yamanaka,Ken‐ichi Okazaki,Takeshi Abe,Koji Nishio,Zempachi Ogumi
出处
期刊:Chemsuschem
[Wiley]
日期:2018-11-19
卷期号:12 (2): 527-534
被引量:24
标识
DOI:10.1002/cssc.201802209
摘要
Fluoride shuttle batteries (FSBs), which utilize defluorination of metal fluorides and fluorination of the resultant metals, are expected to have high energy densities. In situ Raman microscopy was conducted during FSB reactions of a nearly-2D cluster of orthorhombic BiF3 microparticles partly embedded in a gold-plated film (o-BiF3 /gold). At a high overpotential, defluorination of the surface of an o-BiF3 particle (or cluster) was almost completed within approximately 120 s. At a low over potential, defluorination proceeded from the contours of the cluster that was in contact with the gold to the center of the cluster, suggesting that the rate-limiting process was electronic diffusion. Conversely, fluorination proceeded uniformly at the surface of the cluster to form BiF3 with a cubic structure (c-BiF3 ). The results will lead to the establishment of a strategy for efficient use of active materials with low electronic and ionic conductivities.
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