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Origin of voltage decay in high-capacity layered oxide electrodes
Open accessAbstract
Although Li-rich layered oxides (Li1+xNiyCozMn1-x-y-zO2 > 250 mAh g(-1)) are attractive electrode materials providing energy densities more than 15% higher than today's commercial Li-ion cells, they suffer from voltage decay on cycling. To elucidate the origin of this phenomenon, we employ chemical substitution in structurally related Li2RuO3 compounds. Li-rich layered Li2Ru1-yTiyO3 phases with capacities of ~240 mAh g(-1) exhibit the characteristic voltage decay on cycling. A combination of transmission electron microscopy and X-ray photoelectron spectroscopy studies reveals that the migration of cations between metal layers and Li layers is an intrinsic feature of the charge-discharge process that increases the trapping of metal ions in interstitial tetrahedral sites. A correlation between these trapped ions and the voltage decay is established by expanding the study to both Li2Ru1-ySnyO3 and Li2RuO3; the slowest decay occurs for the cations with the largest ionic radii. This effect is robust, and the finding provides insights into new chemistry to be explored for developing high-capacity layered electrodes that evade voltage decay.
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The development and future of lithium ion batteries
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Yan, M., He, P., Chen, Y., Wang, S., Wei, Q., Zhao, K., Xu, X., An, Q., Shuang, Y., Shao, Y., et al. (2018) · Advanced Materials · doi:10.1002/adma.201703725 · Cited by 1,456
Moysiadou, A., Lee, S., Hsu, C.-S., Chen, H. M., & Hu, X. (2020) · Journal of the American Chemical Society · doi:10.1021/jacs.0c04867 · Cited by 987
Visualization of O-O peroxo-like dimers in high-capacity layered oxides for Li-ion batteries
McCalla, E., Abakumov, A. M., Saubanère, M., Foix, D., Berg, E. J., Rousse, G., Doublet, M.-L., Gonbeau, D., Novák, P., Van Tendeloo, G., et al. (2015) · Science · doi:10.1126/science.aac8260 · Cited by 854
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Metadata
- Authors
- Sathiya, M., Abakumov, A. M., Foix, D., Rousse, G., Ramesha, K., Saubanère, M., Doublet, M. L., Vezin, H., Laisa, C. P., Prakash, A. S., Gonbeau, D., VanTendeloo, G., & Tarascon, J.-M.
- Venue
- Nature Materials
- Published
- 2014-12-01
- Volume
- 14
- Issue
- 2
- Pages
- 230-238
- ISSN
- 1476-1122 (ISSN-L)
- 1476-4660
- OpenAlex
- W2026001144
- Cited by
- 922
- References
- 2
- FWCI
- 35.02
- Type
- journal article
- Language
- en
- Open access
- green
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- Sathiya, M., Abakumov, A. M., Foix, D., Rousse, G., Ramesha, K., Saubanère, M., Doublet, M. L., Vezin, H., Laisa, C. P., Prakash, A. S., Gonbeau, D., VanTendeloo, G., & Tarascon, J.-M. (2015). Origin of voltage decay in high-capacity layered oxide electrodes. Nature Materials. https://doi.org/10.1038/nmat4137
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