The determination of trace free acid content in lithium-ion battery electrolytes by coulometric titration in non-aqueous media.

A new quantitative analysis method was proposed, aiming at resolving the difficulty encountered in accurately determining the trace content of a free acid in lithium-ion battery electrolytes in the past 30 years. The presented method overcame the three restrictive factors of lithium-ion battery electrolytes, namely, poor thermal stability, the formation of hydrofluoric acid with water and difficulty in the accurate determination of trace free acids. The free acid in lithium-ion battery electrolytes was directly titrated with ethoxide ions generated through the electrolyzation of a 0.

Determination of Trace Amounts of Hydrofluoric Acid in Non-Aqueous Solutions by the Coulometric Titration Method.

For monitoring of trace amounts of hydrofluoric acid in the organic fluorine chemical industry, a facile method for determination of the hydrofluoric acid in an ethanol solution of lithium chloride, by coulometric titration, was proposed. Relying on homemade acid⁻base coulometric autotitrator, the electrolyte was 0.50 mol·L LiCl ethanol solution and the constant current intensity was 0.