Reversible Room-Temperature Fluoride-Ion Insertion in a Tunnel-Structured Transition Metal Oxide Host
Reversible Room-Temperature Fluoride-Ion Insertion in a Tunnel-Structured Transition Metal Oxide Host
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隧道结构过渡金属氧化物主体中的可逆室温氟离子插入
DOI：
10.1021/acsenergylett.0c01328
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发表时间：
2020
影响因子：
22
通讯作者：
Guo, Jinghua
中科院分区：
文献类型：
--
作者：
Zaheer, Wasif;Andrews, Justin L.;Parija, Abhishek;Hyler, Forrest P.;Jaye, Cherno;Weiland, Conan;Yu, Young-Sang;Shapiro, David A.;Fischer, Daniel A.;Guo, Jinghua
通过使用阴离子作为主要的电荷载体，与锂离子电池化学相垂直的储能模式可以被概念化。F-离子转化化学显示了良好的前景，但由于金属-金属氟化物相互转化时活性电极体积的显着变化，其循环能力有限。相比之下，由于缺乏能够在室温下进行可逆的F-离子插入的宿主，对插入化学的探索一直受到阻碍。在这里，我们展示了室温下F离子在亚微米级FeSb_2O_4粒子一维隧道内的可逆和均匀的拓扑化学插入/脱插和整体扩散。F离子的插入表现为铁中心从Fe2+到Fe3+的形式氧化，在每个铁中心一个F离子的容量下，晶格体积收缩为1%。观察到F离子在FeSb_2O_4粒子上的拓扑化学插入是均匀的。进一步论证了一种通过溶液相拓扑化学方法筛选F-离子插入电极的方法。
An energy storage paradigm orthogonal to Li-ion battery chemistries can be conceptualized by employing anions as the primary charge carriers. F-ion conversion chemistries show promise but have limited cyclability as a result of the significant change in volume of active electrodes upon metal–metal fluoride interconversion. In contrast, the exploration of insertion chemistries has been stymied by the lack of hosts amenable to reversible F-ion insertion at room temperature. Here we show the reversible and homogeneous topochemical insertion/deinsertion and bulk diffusion of F ions within the one-dimensional tunnels of submicrometer-sized FeSb2O4particles at room temperature. The insertion of F ions is evidenced by formal oxidation of the iron centers from Fe2+to Fe3+with a lattice volume contraction of <1% at a capacity of one F ion per iron center. The topochemical insertion of F ions is observed to be homogeneous across the FeSb2O4particles. An approach to screen F-ion insertion electrodes through solution-phase topochemical methods is further demonstrated.
有机实验室中的二氟化氙：底物、溶剂和容器的故事
影响因子：
0.9
作者：
C. Ramsden
通讯作者：
C. Ramsden
影响因子：
22
作者：
Yadav, Gautam G.;Turney, Damon;Banerjee, Sanjoy
通讯作者：
Banerjee, Sanjoy