LiTFOP (Lithium tetrafluoro(oxalato)phosphate, >99.5%) Powder as Electrolyte Additive for Lithium-Ion Battery, 10-50 g/bottle, CLIBEALiTFOP

Lithium Tetrafluoro(oxalato)phosphate—abbreviated as LiTFOP, LiOTFP, or LiPF4(C2O4)—is a chelated organophosphorus lithium-salt additive. Combining a central phosphorus atom bound to four fluorine atoms and one bidentate oxalate ligand, it acts as a film-forming interphase builder and thermal stabilizer for high-voltage, fast-charging lithium-ion and lithium-metal batteries. The core functional roles & electrochemical advantages are shown below:

Dual-Sided Interphase Passivation (SEI & CEI): (1) Anode (SEI): Owing to its lower LUMO energy level relative to baseline carbonate solvents, LiTFOP undergoes sacrificial reduction at ~ 1.3–1.5 V vs. Li/Li+. Ring-opening of the oxalate ligand polymerizes into an organic matrix, while fluorine and phosphorus moieties yield a hybrid inorganic/organic Solid Electrolyte Interphase (SEI) rich in LiF and lithium phosphates LixPOyFz). (2) Cathode (CEI): Under oxidation at high potentials (>4.3–4.5 V vs. Li/Li+), the oxalate unit forms a dense Cathode Electrolyte Interphase (CEI) on nickel-rich (NMC811, NCMA) and high-voltage cobalt oxides. This layer passivates active surface oxygen sites and suppresses transition-metal leaching.

Low Charge-Transfer Impedance & Rapid Kinetics: The LiF- and Li3PO4-rich inorganic species generated by LiTFOP offer lower activation energy barriers for Li+ desolvation. This significantly reduces interfacial charge-transfer resistance (Rct) at both electrode interfaces compared to mono-salt additives, aiding rate capability and fast-charging performance.

Enhanced Thermal Stability vs. Standard LiPF6: Unlike LiPF6, which undergoes thermal decomposition into volatile PF5 gas at elevated temperatures, the oxalate-chelated phosphorus structure in LiTFOP exhibits higher thermal decomposition thresholds. When added to carbonate electrolytes, it mitigates autocatalytic electrolyte breakdown and suppresses cell swelling during high-temperature aging. 

Dendrite Inhibition on Lithium Metal: The uniform LiF-dense inner SEI layer levels local electric field variations on alkali-metal anodes, promoting homogeneous Li+ flux and suppressing dendritic growth in lithium-metal systems.

Part Number	CLIBEALiTFOP (C-LIB-EA-LiTFOP)
Chemical Formula	C2F4LiO4P
Appearance	White Powder
Purity	>99.5% (Battery Grade)
Molecular Weight	201.93 g/mol
Package Size	10 g, 25 g, and 50 g/bottle

Notes: Please store the LiTFOP powder in the glovebox due to its sensitivity to humidity and oxygen 

References: 

1. Y. Qin, et al. Lithium Tetrafluoro Oxalato Phosphate as Electrolyte Additive for Lithium-Ion Cells, Electrochem. Solid-State Lett., 2010, 13 A11
2. S. Azam, et al. Impact of Electrolyte Additives on the Lifetime of High Voltage NMC Lithium-Ion Pouch Cells, J. Electrochem. Soc., 2024, 171, 110510