1. A reversible copper extrusion-insertion electrode for rechargeable Li batteries.
- Author
-
Morcrette M, Rozier P, Dupont L, Mugnier E, Sannier L, Galy J, and Tarascon JM
- Subjects
- Electrochemistry methods, Energy Transfer, Equipment Design, Equipment Failure Analysis, Lithium, Manufactured Materials, Materials Testing, Molecular Conformation, Powders, Surface Properties, Copper chemistry, Crystallization methods, Electric Power Supplies, Electrochemistry instrumentation, Electrodes, Vanadium Compounds chemistry
- Abstract
Although widely used, the most promising Li-based technologies still suffer from a lack of suitable electrodes. There is therefore a need to seek new materials concepts to satisfy the increasing demands for energy storage worldwide. Here we report on a new layered electrode material, Cu(2.33)V(4)O(11), which shows a sustainable reversible capacity of 270 mA h g(-1) at a voltage of about 2.7 V, and electrochemically reacts with Li in an unusual and spectacular way. The reaction entails a reversible Li-driven displacement process leading to the growth and disappearance of Cu dendrites with a concomitant reversible decomposition and recrystallization of the initial electrode material. We show from structural considerations that the uniqueness of Cu(2.33)V(4)O(11) is rooted in the peculiar flexibility of the stacked [V(4)O(11)](n) layers, which is due to the presence of pivot oxygen atoms. Fully reversible displacement reactions could provide a new direction for developing an alternative class of higher energy density Li storage electrodes.
- Published
- 2003
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