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Electrochemical Properties of Nanostructured Al1-xCux Alloys as Anode Materials for Rechargeable Lithium-Ion Batteries.
- Source :
- Journal of The Electrochemical Society; 2008, Vol. 155 Issue 9, pA615-A622, 8p, 3 Black and White Photographs, 1 Chart, 8 Graphs
- Publication Year :
- 2008
-
Abstract
- The key challenge to use metallic alloys as anodes in rechargeable lithium batteries is to improve their cycling ability without compromising their high specific capacity. We suggest that an important parameter controlling these two properties is the magnitude of interaction between the active and the inactive components in the alloy system. We demonstrated these ideas on the Al-Cu system by investigating the structure and electrochemical properties of sputtered Al<subscript>1-x</subscript>Cu<subscript>x</subscript> (0 < x < 0.37) thin-film alloys. The optimum composition is determined to be ~20 at % Cu. A specific capacity of 792 mAh/g has been obtained for nanostructured Al<subscript>0.8</subscript>Cu<subscript>0.2</subscript> with capacity retention of ~50% after 100 cycles. The formation of a supersaturated solid solution structure is also suggested to enhance the electrochemical performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00134651
- Volume :
- 155
- Issue :
- 9
- Database :
- Supplemental Index
- Journal :
- Journal of The Electrochemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 34140291
- Full Text :
- https://doi.org/10.1149/1.2943215