纳米晶材料
钼
循环伏安法
扩展X射线吸收精细结构
电化学
无定形固体
傅里叶变换红外光谱
正交晶系
材料科学
锂(药物)
化学工程
氧化物
单斜晶系
气凝胶
三氧化钼
晶体结构
化学
吸收光谱法
冶金
结晶学
电极
纳米技术
物理化学
光学
工程类
医学
物理
内分泌学
作者
Winny Dong,A. N. Mansour,Bruce Dunn
标识
DOI:10.1016/s0167-2738(01)00901-8
摘要
The structure and chemical differences among amorphous, crystalline and nanocrystalline molybdenum oxide aerogels were determined using extended X-ray absorption fine structure (EXAFS), Fourier transform infrared (FTIR) analysis and powder X-ray diffraction (XRD). These different forms of the same nominal material are produced by heat treatment. The influence of the structural differences on electrochemical properties was examined using stepped cyclic voltammetry. The most interesting material was the MoO3 aerogel heated to 300 °C. The material was found to be nanocrystalline; there are no XRD peaks but the EXAFS were virtually identical to orthorhombic MoO3. The electrochemcial response of the nanocrystalline material contains characteristics of both the amorphous and crystalline forms, but with better lithium capacity than either one.
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