Anion–Diluent Decoupled Solvation Chemistry in Ionic Liquid‑Based Localized High‑Concentration Electrolytes Toward High‑Voltage Lithium Metal Batteries (IMAGE)
Caption
- Weak diluent-anion interactions decouple FSI⁻ from diluent molecules, promoting a contact ion pair (CIP)-dominant solvation structure in IL-based localized high-concentration electrolytes.
- The CIP-dominant solvation sheath exhibits intrinsically higher oxidation stability and facilitates faster Li⁺ desolvation and interfacial charge transfer kinetics.
- The designed TFE-LHCE enables 600 stable cycles for 4.3 V Li||NCM523 cells and 200 cycles for 4.5 V Li||NCM811 cells, with a 2.6 Ah pouch cell passing nail penetration tests.
Credit
Guangye Wu, Haifeng Tu, Zhicheng Wang*, Yiwen Gao, Peng Ding, Yi Yang, Lingwang Liu, Suwan Lu, Farwa Mushtaq, Guochao Sun, Hexiang Chen, Haiyang Zhang, Jiangyan Xue, Jingjing Xu, Hong Li, Xiaodong Wu*
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CC BY-NC-ND