MUMBAI, India, July 31 -- Intellectual Property India has published a patent application (202411096121 A) filed by Macsen Drugs on December 05, 2024, for Method Of Preparation Of An Air Stable Alkali Metal Iron (ii) - Hexacyanoferrate (ii).

Inventors include Agrawal, Achal Narendrakumar; Chandre, Tukaram Nivrutti; and Goyal, Yogita.

The application for the patent was published on July 24, 2026, under issue no. 30/2026.

Abstract: The present disclosure provides an air stable alkali metal iron (II)-hexacyanoferrate (II) of Formula AxMy[Fe(CN)6].zH2O, wherein A is an alkali metal or combinations thereof, M is Fe, x is 1.0 to 2.0, y is 0.7 to 1.0 and z is less than 5.0, wherein the alkali metal iron (II)-hexacyanoferrate (II) is treated with an electrochemically active material such that at least part of surface of particles of alkali metal iron (II)-hexacyanoferrate (II) is covered with said electrochemically active material. Aspects of the present disclosure also provides a method of preparation, an electrode, and a cell comprising the air stable alkali metal iron (II)- hexacyanoferrate (II).

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