Electrolytic synthesis of FeS2 for thin-layer lithium battery

Purposeful synthesis of iron sulfide FeS₂ films for a lithium battery were purposefully synthesized on a 18N12Kh9T steel cathode from a solution containing Mohr’s salt and Na₂S₂O₃. Various aspects of synthesis were studied. Thin-film Fe-sulfide synthesis products were tested in a prototype lithium battery and also in a lithium-ion system. The synthesized electrolytic iron sulfide FeS₂ with a marcasite structure is capable of reversible electrochemical transformation with output of 390 mA h g^?1 in negative electrodes of the lithium-ion system with a LiMn₂O₄ counter electrode.