Preparation and characterization of nanocrystalline Li7Si3 alloy - 文章详情页

作者：

Song, X.-Y. (Song, X.-Y..) (学者：宋晓艳) | He, J.-T. (He, J.-T..) | Zhou, Y.-Y. (Zhou, Y.-Y..) | Liu, Q.-H. (Liu, Q.-H..)

收录：

Scopus PKU CSCD

摘要：

To　study　the　characteristics　of　nanostructured　anode　materials　of　Li　batteries,　the　nanocrystalline　Li-Si　alloy　was　prepared.　Nanocrystalline　Li7Si3　alloy　was　prepared　with　the　optimized　processing　route　including　a　series　of　procedures　as　cast　of　polycrystalline　Li7Si3　ingot,　ball　milling　to　obtain　the　amorphous　powder　and　spark　plasma　sintering　to　prepare　the　nanocrystalline　Li7Si3　bulk.　The　crystal　structure　was　determined　using　the　Rietveld　refinement　method　and　the　Young＇s　modulus　was　measured.　Results　show　that　the　prepared　nanocrystalline　Li7Si3　has　larger　lattice　constants　compared　with　those　of　the　conventional　polycrystalline　counterpart,　i.e.,　a=b=0.4452　nm,　c=1.8239　nm,　and　unit　cell　volume　Vo=0.313070　nm3.　The　unit　cell　volume　is　1.35%　larger　than　that　of　the　coarse-grained　polycrystalline　counterpart　with　a　value　of　Vo=0.308886　nm3.　The　Young＇s　modulus　of　the　nanocrystalline　Li7Si3　was　as　(30.6±2.4)　GPa.

关键词：

Li7Si3; Nanocrystalline; Structure refinement; Young's modulus

作者机构：

[ 1 ] [Song, X.-Y.]College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [He, J.-T.]College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Zhou, Y.-Y.]College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Liu, Q.-H.]College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China

通讯作者信息：

宋晓艳
[Song, X.-Y.]College of Materials Science and Engineering, Beijing University of TechnologyChina

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