METHOD FOR PREPARING IRON SULFIDE, CATHODE COMPRISING IRON SULFIDE PREPARED THEREBY FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

摘要

The present invention relates to: a method for preparing iron sulfide (FeS₂), which is selective for and allows high-purity iron sulfide to be prepared in a simple process; a cathode containing iron sulfide (FeS₂) for a lithium secondary battery, in which iron sulfide (FeS₂) adsorbs lithium polysulfide generated during charging and discharging processes of the lithium secondary battery, thereby enabling the battery to increase in charge and discharge efficiency and to improve in lifespan characteristic; and a lithium secondary battery comprising same.