FIELD: chemistry.
SUBSTANCE: invention relates to active material of positive electrode of lithium-air accumulator in form of whiskers with composition KxMnO2 (x=0.1-0.15) from 0.1 mcm to 2 mm long and diameter from 20 to 30 nm for reversible reduction of oxygen on positive electrode. Invention also relates to method of obtaining thereof, including dissolution of potassium permanganate and potassium persulphate and mixing mixture at medium pH from 2 to 4 for 2-12 hours, at temperature 95°C with the following filtration, and washing of product and drying at 60°C.
EFFECT: application of said material makes it possible to achieve high specific electrochemical capacity.
2 cl, 5 dwg, 1 tbl, 2 ex
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