Enhanced Lithium‐Ion Battery Electrodes with Metal–Organic Framework Additives Featuring Undercoordinated Zr⁴⁺ Sites

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 31, 2025

Abstract Performances of lithium‐ion batteries (LIBs) are dictated by processes electron‐ion separation, transfers, and combination. While carbon additives routinely used to ensure electronic conductivity, capable simultaneously boosting ion conduction delivering step‐change performance remain elusive. Herein, metal–organic frameworks (MOFs) possessing coordinately unsaturated Zr 4+ sites exploited as a new material library electrode additives. The MOFs imbue infused electrolytes with an expanded electrochemical stability window (0 5 V vs Li/Li⁺) enhanced Li⁺ transport efficiency. Mechanistically, strong interactions between Li + solvation sheaths result in trimmed, anion‐fixed, solvent‐separated pairs, mitigating electrostatic coupling enabling efficient translocation the porous nanospace. Concomitantly, these structural modulations foster interfacial stabilities. When implemented at 1.7 wt.% graphite sub‐Ah full cell, MOF significantly improved diffusional kinetic, rate capability beyond 2C, cycling longevity doubling lifespan. This work offers straightforward yet effective route remedy bottlenecks industrial LIBs.

Язык: Английский

Integrating Ethereal Molecular Backbones into the Ester Solvent with High Solubility of Nitrate for High‐Voltage Li Metal Batteries

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 8, 2025

Abstract The high‐energy‐density Li metal batteries require high‐voltage cathode, low negative/positive capacity (N/P) ratio and lean electrolyte. Despite the all‐fluorinated electrolytes with severe corrosion, development of ester is stagnant due to incompatibility solvent anode. Hence, various electrolyte additives have been developed. Among them, LiNO 3 considered as most effective additive for improving reversibility deposition. Unfortunately, their solubility into extremely low. This investigation suggests that strong ionic bonds in solvation energy are main triggers insolubility a new organic nitrate salt (N‐propyl‐N‐methylpyrrolidinium (Py 13 NO )) large cations liner (dipropyleneglycol methyl ether acetate (DPGMEA)) designed, which integrates ethereal molecular backbones solvent. Consequently, containing 1.2 m lithium bis(fluorosulfonyl)imide (LiFSI), 0.3 Py 0.1 disfluorophosphate (LiPO 2 F ) fluoroethylene carbonate (FEC):DPGMEA (2:8) showcases excellent electrochemical performance batteries. Eventually, “1 Ah level” Li||LiNi 0.8 Co Mn O (NCM811) pouch cell (N/P ≈1.2; electrolyte/capacity (E/C) ≈2.5 g −1 exhibits cycle life over 150 times designed

Язык: Английский

“Lancet-Like” Mn-MOF Nanowires with Parallel Alignment for Separator Modification in Lithium Metal Batteries

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

Опубликована: Апрель 29, 2025

Язык: Английский