BATTERY CELL Russian patent published in 2022 - IPC H01M10/525 H01M10/563 H01M10/567 H01M10/58 

FIELD: power sources.

SUBSTANCE: invention relates to a battery cell (2, 20, 40) containing an active metal, at least one positive electrode (4, 23, 44), at least one negative electrode (5, 22, 45), a housing (1, 28) and an electrolyte, while the positive electrode (4, 24, 44) contains at least one polyanion compound as the active material, the electrolyte is based on SO₂ and contains at least one conductive salt of formula (1)

in which M is a metal selected from a group consisting of alkali metals, alkaline earth metals, metals of group 12 of the Periodic Table of Elements, and aluminum; x is an integer from 1 to 3; substituents R¹, R², R³ and R⁴ are selected, independently of each other, from a group consisting of C₁-C₁₀ alkyl, C₂-C₁₀ alkenyl, C₂-C₁₀ alkynyl, C₃-C₁₀ cycloalkyl, C₆-C₁₄ aryl and C₅-C₁₄ heteroaryl, Z is aluminum or boron.

EFFECT: increase in capacity and stability at low temperatures.

25 cl, 3 tbl, 15 dwg, 7 ex