Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 9, Issue 5, Pages 930-934Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2006.11.031
Keywords
lithium ion battery; anode; current collector; silicon
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A three-dimensional cellular silicon-based anode was prepared by casting milled silicon powders into the valley-ridge copper architecture, then its electrochemical property and failure mechanism were studied by means of charging-discharging (C-D) test, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). In comparison with common 2D anode fabricated by slurry-coating technology on flat copper foil, the 3D copper framework has shown a great structure advantage in restricting severe volume changes of silicon particles. This stress-alleviated action can effectively impede strain-induced loosening happened inside electrodes during charging and discharging, and consequently improve cycle-life and coulombic efficiency of silicon-based anode. (c) 2006 Elsevier B.V. All rights reserved.
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