Refined, in-situ EDXD structural analysis of the Li[Li1/3Ti5/3]O4 electrode under lithium insertion-extraction

被引:49
作者
Panero, S [1 ]
Reale, P
Ronci, F
Scrosati, B
Perfetti, P
Albertini, VR
机构
[1] Univ Roma La Sapienza, Dipartimento Chim, I-00185 Rome, Italy
[2] CNR, Ist Struttura Mat, Rome, Italy
关键词
D O I
10.1039/b008703n
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
An in-situ energy dispersive X-ray diffraction (EDXD) analysis has been run on the Li[Li1/3Ti5/3]O-4 compound upon Li intercalation-deintercalation process. The results confirm that this process is accompanied by a very small variation of the host lattice parameter, i.e., confined between 1 over the entire cycle. This value, which agrees with previous literature information, concurs to demonstrate that Li[Li1/3Ti5/3]O-4 may indeed be considered as a zero-strain intercalation compound, this being a characteristic of key technological importance since lattice strains upon cycling are among the main causes of capacity decays in lithium battery electrodes. In addition, this work confirms that EDXD is a quite convenient technique for electrochemical measurements since, allowing in-situ lattice parameter determinations, may lead to a complete evaluation of the intermediate stages of the intercalation process and, possibly, to detect differences among the various cycles.
引用
收藏
页码:845 / 847
页数:3
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