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AssigneeLG Energy Solution, Ltd.
InventorsHyun-Chul KIM, Sang-Wook WOO, Chang-Ju LEE
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A method for preparing a spheronized carbonaceous negative electrode active material, including the steps of: mixing scaly graphite, solid pitch and liquid pitch to form a mixture, and spheronizing the mixture to prepare spheronized granulated particles; firing the spheronized granulated particles; carrying out carbon coating of the fired spheronized granulated particles to form carbon-coated spheronized granulated particles; heat treating the carbon-coated spheronized granulated particles; and disintegrating the heat treated carbon-coated spheronized granulated particles.
A method for preparing a spheronized carbonaceous negative electrode active material, comprising the steps of:
A spheronized carbonaceous negative electrode active material, having a specific surface area of from 1.0 m2/g to 2.5 m2/g and a total pore volume of from 0.7 e−2 m3/g to 1.8 e−2 m3/g, and pores having a size of 24 nm or more in the spheronized carbonaceous negative electrode active material and the pores have a specific surface area of 0.2 m2/g to 0.6 m2/g.
Dependencies are inferred from the claim text.