Fire extinguishing material for lithium battery

Abstract

A fire extinguishing material for lithium battery fire suppression, of the present invention, is composed of: a granular first fire extinguishing material, which is prepared by firing a silica powder and the like and which has a predetermined size; a second fire extinguishing material of a single-layer graphene compound applied, in multiple layers, to the surface of the first fire extinguishing material; and a third fire extinguishing material made of a metal carbonate covalently bonded or applied to the graphene compound. During a lithium battery fire, when the fire extinguishing material of the present invention is applied to a fire source through a discharge means such as a fire extinguisher, the fire extinguishing material is put on top of the fire source, the second fire extinguishing material, that is, the metal carbonate, which comes in direct contact with the fire source, adsorbs carbon dioxide, which is most abundantly generated from the fire source, so as to absorb radicals while being converted into a bicarbonate, thereby primarily extinguishing the fire, and the graphene compound, which is the second fire extinguishing material with excellent thermal conductivity, rapidly releases heat from the fire to the outside so as to improve, by means of effective cooling, fire extinguishing performance for the lithium battery fire, thereby preventing thermal runaway during the lithium battery fire, and extinguishes the lithium battery fire together with an additional smothering effect of the first fire extinguishing material, and thus can prevent the spread of fire.

Dependencies are inferred from the claim text.