A Universal Highly Concentrated Electrolyte for Improved Cycling Stability in Li(Ni1-x-yMnxCoy)O2-NMC-Based Batteries

Energies, Год журнала: 2025, Номер 18(4), С. 974 - 974

Опубликована: Фев. 18, 2025

While 1 M LiPF6 has been widely adopted as the standard electrolyte in current LIBs, its chemical instability reduced battery’s cycling stability by, for instance, accelerating dissolution of transition metals from electrode materials, particularly high-voltage cathodes. Lithium bis(fluorosulfonyl)imide (LiFSI) emerged a promising alternative salt next-generation energy-dense LIB electrolytes. However, despite extensive research, optimal concentration and formulation LiFSI remain unresolved, with variations typically tested across different Li(Ni1-x-yMnxCoy)O2 (NMC) series Herein, 6:4.5:8.3 LiFSI/EC/DMC (in molar ratio) is proposed universal NMC The decomposes to form uniform cathode–electrolyte interface abundant inorganic species, resulting lower resistance. By adopting electrolyte, Li-ion half-cells are all able stably cycle up 200 cycles at cut-off voltage 4.4 V. Especially high Ni content (NMC 811) cathode, capacity retention was improved 43.6% 87.5% when charged V 1C rate. This work provides feasible developing LIBs.

Язык: Английский

4-(Trifluoromethyl)phenyl Isothiocyanate as a Bifunctional Additive for Regulating High-Temperature Performance of Lithium-High Nickel Batteries

ACS Applied Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

Язык: Английский

A synergistic modification of Zr doping and a lattice-reconstructed La2Li0.5Ni0.5O4 coating enables high-performance nickel-rich cathodes

Journal of Energy Storage, Год журнала: 2024, Номер 106, С. 114926 - 114926

Опубликована: Дек. 6, 2024

Язык: Английский