Scalable salt-templated synthesis of two-dimensional transition metal oxides.
Scalable salt-templated synthesis of two-dimensional transition metal oxides.
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二维过渡金属氧化物的可扩展盐模板合成
DOI：
10.1038/ncomms11296
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发表时间：
2016-04-22
影响因子：
16.6
通讯作者：
Gogotsi Y
中科院分区：
文献类型：
--
作者：
Xiao X;Song H;Lin S;Zhou Y;Zhan X;Hu Z;Zhang Q;Sun J;Yang B;Li T;Jiao L;Zhou J;Tang J;Gogotsi Y
二维原子晶体，例如二维氧化物，在能量存储方面引起了广泛的关注，因为几乎所有的原子都可以暴露于电解质并参与氧化还原反应。然而，目前的策略在很大程度上限于固有的层状化合物。在这里，我们报告了一个一般的策略，使用水溶性盐晶体的表面作为生长模板，不仅适用于层状化合物，但也各种过渡金属氧化物，如六方晶系-MoO 3，MoO 2，MnO和六方晶系-WO 3。平面生长被假设为通过盐和生长的氧化物的晶格之间的匹配而发生。重新堆叠的二维六边形MoO 3表现出高赝电容性能（例如，在Al 2（SO 4）3电解质中为300 F cm-3）。各种二维过渡金属氧化物的合成和高电容的展示有望使维度对其性质的影响的基础研究成为可能，并促进其在储能和其他应用中的使用。
Two-dimensional atomic crystals, such as two-dimensional oxides, have attracted much attention in energy storage because nearly all of the atoms can be exposed to the electrolyte and involved in redox reactions. However, current strategies are largely limited to intrinsically layered compounds. Here we report a general strategy that uses the surfaces of water-soluble salt crystals as growth templates and is applicable to not only layered compounds but also various transition metal oxides, such as hexagonal-MoO3, MoO2, MnO and hexagonal-WO3. The planar growth is hypothesized to occurviaa match between the crystal lattices of the salt and the growing oxide. Restacked two-dimensional hexagonal-MoO3exhibits high pseudocapacitive performances (for example, 300 F cm−3in an Al2(SO4)3electrolyte). The synthesis of various two-dimensional transition metal oxides and the demonstration of high capacitance are expected to enable fundamental studies of dimensionality effects on their properties and facilitate their use in energy storage and other applications.