Excess volume in nanocrystalline lithium-carbon system

Micro & nano letters

article

Wenwu Xu¹  Xiaoyan Song¹  Martin Seyring²  Jiangtao He¹  Martin Drüe²  Markus Rettenmayr² 

[1] College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, Beijing University of Technology;Institute of Materials Science and Technology, Friedrich-Schiller-University Jena

关键词: grain boundaries;    grain size;    lithium compounds;    nanofabrication;    nanostructured materials;    X-ray diffraction;    nanocrystalline lithium-carbon system;    excess volume;    X-ray diffraction;    nanocrystalline samples;    grain size;    nanocrystalline anode materials;    model calculations;    grain geometry;    spherical shape;    atomic density;    nanocrystalline alloy;    grain boundary expansion;    Li2C2;   

DOI  :  10.1049/mnl.2012.0961

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

A method that combines model calculations with X-ray diffraction analyses on prepared nanocrystalline samples has been developed to determine the excess volume and its dependence on grain size in nanocrystalline anode materials. In the model calculations, the geometry of grains in nanocrystalline systems is treated as a spherical shape for simplicity. It has been determined that the excess volume depends on grain size and atomic density at grain boundaries. The nanocrystalline Li 2 C 2 alloy was taken as an example of the nanostructured anodes and its grain boundary expansion was generated by the excess volume at different grain size levels.

【 授权许可】

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