1. A dicarbonate solvent electrolyte for high performance 5 V-Class Lithium-based batteries
- Author
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Xiaozhe Zhang, Pan Xu, Jianing Duan, Xiaodong Lin, Juanjuan Sun, Wenjie Shi, Hewei Xu, Wenjie Dou, Qingyi Zheng, Ruming Yuan, Jiande Wang, Yan Zhang, Shanshan Yu, Zehan Chen, Mingsen Zheng, Jean-François Gohy, Quanfeng Dong, and Alexandru Vlad more...
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Science - Abstract
Abstract 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. more...
- Published
- 2024
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