True atomic-scale imaging of a spinel Li4Ti5O12(111) surface in aqueous solution by frequency-modulation atomic force microscopy

被引：7
作者：
Kitta, Mitsunori [1 ]
Kohyama, Masanori [1 ]
Onishi, Hiroshi [2 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Res Inst Ubiquitous Energy Devices, Ikeda, Osaka 5638577, Japan
[2] Kobe Univ, Grad Sch Sci, Dept Chem, Nada Ku, Kobe, Hyogo 6578501, Japan
来源：
APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 11期
基金：
日本学术振兴会;
关键词：
FE3O4(111); INSERTION; WATER; ADSORPTION; RESOLUTION; FEO(111); CALCITE;
D O I：
10.1063/1.4896137
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Spinel-type lithium titanium oxide (LTO; Li4Ti5O12) is a negative electrode material for lithium-ion batteries. Revealing the atomic-scale surface structure of LTO in liquid is highly necessary to investigate its surface properties in practical environments. Here, we reveal an atomic-scale image of the LTO(111) surface in LiCl aqueous solution using frequency-modulation atomic force microscopy. Atomically fiat terraces and single steps having heights of multiples of 0.5 nm were observed in the aqueous solution. Hexagonal bright spots separated by 0.6 nm were also observed on the flat terrace part, corresponding to the atomistic contrast observed in the ultrahigh vacuum condition, which suggests that the basic atomic structure of the LTO(111) surface is retained without dramatic reconstruction even in the aqueous solution. (C) 2014 AIP Publishing LLC
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页数：3
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