Topochemical stabilization and single-crystal transformations of a metastable 2D γʹ-V2O5 intercalation cathode

Topochemical stabilization and single-crystal transformations of a metastable 2D γʹ-V2O5 intercalation cathode
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亚稳态 2D γ-V2O5 插层阴极的拓扑化学稳定和单晶转变

DOI:
10.1016/j.xcrp.2021.100712
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发表时间:
2022
影响因子:
8.9
通讯作者:
Banerjee, Sarbajit
Banerjee, Sarbajit
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Handy, Joseph V.;Andrews, Justin L.;Zhang, Baiyu;Kim, Doyun;Bhuvanesh, Nattamai;Tu, Qing;Qian, Xiaofeng;Banerjee, Sarbajit

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正电极材料的原子论设计需要理解(1)客体阳离子如何扩散通过嵌入主体以填充空的空隙,以及(2)由于离子嵌入而引起的主体晶格的畸变。在这里,我们报告使用拓扑化学访问的亚稳态二维货车德瓦尔斯固体,γ-V2 O 5的单晶,并检查其单晶到单晶的转变锂化后,γ-LiV 2 O 5。高分辨率的单晶衍射提供了一个原子的观点,优先间隙的位置所占据的锂离子和扭曲的二维晶格在一个扩展的固溶体锂化制度,这与热力学α-V2 O 5相形成鲜明对比。这些结果说明了具有重新配置的原子连接性的亚稳态化合物解锁锂化途径和机制的潜力,这些途径和机制与其热力学对应物截然不同。该研究进一步证明了结合局部化学修饰与单晶衍射以原子分辨率成像嵌入现象的可行性。
The atomistic design of positive electrode materials requires understanding of (1) how guest cations diffuse through an intercalation host to fill empty interstices and (2) the distortions of the host lattice induced as a result of ion intercalation. Here, we report the use of topochemistry to access single-crystals of a metastable 2D van der Waals solid, γʹ-V2O5, and examine its single-crystal-to-single-crystal transformations upon lithiation up to γ-LiV2O5. High-resolution single-crystal diffraction provides an atomistic view of preferred interstitial sites occupied by Li ions and distortions of the 2D lattice in an extended solid-solution lithiation regime, which stands in stark contrast to the thermodynamic α-V2O5phase. These results illustrate the potential of metastable compounds with reconfigured atomic connectivity to unlock lithiation pathways and mechanisms that are profoundly different from their thermodynamic counterparts. The study furthermore demonstrates the viability of combining topochemical modification with single-crystal diffraction to image intercalation phenomena with atomic resolution.
DOI: 10.1021/acsami.7b05556
发表时间: 2017-07-19
影响因子: 9.5
作者:
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通讯作者: Banerjee, Sarbajit
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DOI: --
发表时间: 2019
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期刊: ACTA MATERIALIA
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DOI: 10.1016/0022-4596(91)90323-a
发表时间: 1991-08-01
影响因子: 3.3
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