▎ 摘　　要

NOVELTY - Manufacturing reduced graphene oxide involves using kish graphite, pre-treating kish graphite, sieving kish graphite which is classified by size, where sixe of Kish graphite is 50 micrometer, removing kish graphite, flotating with kish graphite, leaching by adding acid so that the ratio of (acid amount)/(kish graphite amount) is 0.25-1.0. The kish graphite is washed and dried. The pre-treated kish-graphite is oxidized to obtain graphene oxide and graphene oxide is reduced into reduced graphene oxide. USE - Method for manufacturing reduced graphene oxide for deposition on metallic substrate and cooling reagent (all claimed). ADVANTAGE - The method enables to manufacture reduced graphene oxide that has high thermal conductivity and high electrical conductivity.