Abstract
The cycling behavior of anode materials based on alloys from the Li(Al1-zZnz) continuous solid solution has been studied. The performance of the most promising composition Li(Al0.8Zn0.2) was tested in half-cells against metallic Li with three different electrolytes and in full Li-ion cells against a V2O5 cathode. The underlying structure evolution during cycling and the most relevant fatigue mechanisms are elucidated by x-ray diffraction, nuclear magnetic resonance, and x-ray photoelectron spectroscopy, and reveal a loss of mobile Li due to the ongoing formation of solid electrolyte interfaces. An enhanced stability for Li(Al1-zZnz) electrodes with z˜0.2 results from a peculiar microstructure due to the decomposition of Al and Zn in the Li-poor state and their intermixing in the Li-rich state.
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Chumak, I., Dmytriv, G., Pavlyuk, V. et al. Li(Al1-zZnz) alloys as anode materials for rechargeable Li-ion batteries. Journal of Materials Research 25, 1492–1499 (2010). https://doi.org/10.1557/JMR.2010.0191
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DOI: https://doi.org/10.1557/JMR.2010.0191