916803

1 M Biphenyl in THF

a precursor solution to prepare the prelithiation/presodiation reagent for disordered carbon, SiO, Sn, Sb, P, and S electrodes

• Empirical Formula (Hill Notation): C₁₂H₁₀
• Molecular Weight: 154.21
• MDL number: MFCD00003054
• UNSPSC Code: 12352401

Properties

• Quality Level: 100
• form: liquid
• concentration: 1 M
• impurities: ≤1000 ppm H₂O
• application(s): battery manufacturing
• storage temp.: 2-8°C

Description

Application

This product is biphenyl (Bp) solution in anhydrous THF (1 mol/L) is a precursor reagent that could be easily handled to prepare prelithiation or presodiation reagent. By direct reaction of Li metal, it forms a strong reducing reagent of Li-Bp. The resulting Li-Bp/THF reagent has the redox potential of 0.41 V vs. Li/Li⁺, which is applicable to prelithiate most of the active materials for Li ion batteries, such as Sn, Sb, P, S, SiO and other metal oxide. On the other hand, a presodiation reagent can be prepared by reacting Bp/THF solution with Na metal. Na-Bp/THF reagent can be used to presodiate hard carbon, a promising anode material in Na ion batteries.

Preparation Note

Suggested Directions for use:

• Step 1 Preparation of Prelithiation/presodiation reagent

Before use of Li metal, scrub the lithium surface to remove oxide and nitride layers.
To prepare 1 M Li-Bp/THF reagent, > 0.07 g of Li metal is added into every 10 ml of 1 M BP/THF solution
To prepare 1 M Na-Bp/THF reagent, > 0.23 g of Na metal is added into every 10 ml of 1 M BP/THF solution

• Step 2 Prelithiation/presodiation of electrodes

For a 1 cm diameter electrode with 1-3 mg acitve material per cm², soak (10-60 min, times will vary with material) the electrode in ∼0.5-1 mL of prelithiation/presodiation reagent. Discard the solution and then wash the electrode twice with THF. Longer prelithiation/presodiation time may cause electrode structure deformation, leading to a decreased discharge/charge capacity.

Safety Information

• Pictograms: GHS02,GHS07,GHS08,GHS09
• Signal Word: Danger
• Hazard Statements: H225 - H302 - H315 - H319 - H335 - H336 - H351 - H411
• Precautionary Statements: P210 - P273 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338 - P308 + P313
• Hazard Classifications: Acute Tox. 4 Oral - Aquatic Chronic 2 - Carc. 2 - Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2
• Supplementary Hazards: EUH018 - EUH019
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 2
• Flash Point(F): 1.4 °F
• Flash Point(C): -17 °C