A dicarbonate solvent electrolyte for high performance 5 V-Class Lithium-based batteries
(2024) Nature Communications — Vol. 15, n° 1 (2024)
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- Rechargeable lithium batteries using 5 V positive electrode materials can deliver considerably higher energy density as compared to state-of-the-art lithium-ion batteries. However, their development remains plagued by the lack of electrolytes with concurrent anodic stability and Li metal compatibility. Here we report a new electrolyte based on dimethyl 2,5-dioxahexanedioate solvent for 5 V-class batteries. Benefiting from the particular chemical structure, weak interaction with lithium cation and resultant peculiar solvation structure, the resulting electrolyte not only enables stable, dendrite-free lithium plating-stripping, but also displays anodic stability up to 5.2 V (vs. Li/Li+), in additive or co-solvent-free formulation, and at low salt concentration of 1 M. Consequently, the Li | |LiNi0.5Mn1.5O4 cells using the 1 M LiPF6 in 2,5-dioxahexanedioate based electrolyte retain >97% of the initial capacity after 250 cycles, outperforming the conventional carbonate-based electrolyte formulations, making this, and potentially other dicarbonate solvents promising for future Lithium-based battery practical explorations.
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Zhang, X., Xu, P., Duan, J., Lin, X., Sun, J., Shi, W., Xu, H., Dou, W., Zheng, Q., Yuan, R., Wang, J., Zhang, Y., Yu, S., Chen, Z., Zheng, M., Gohy, J.-F., Dong, Q., & Vlad, A. (2024). A dicarbonate solvent electrolyte for high performance 5 V-Class Lithium-based batteries. Nature Communications, 15(1). https://doi.org/10.1038/s41467-024-44858-3 (Original work published 2024)