Lithium secondary battery comprising spherical graphite as anode active material
AssigneeLG Chem, Ltd.
InventorsByoung Hoon Ahn, Chang-Wan Koo, Joon Sung Bae, Jae Bin Chung
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Abstract
Disclosed is an anode active material for lithium secondary batteries that includes natural graphite particles consisting of spherical particles of agglomerated graphite sheets, outer surfaces of which are not coated with a carbon-based material, wherein the surfaces of the particles have a degree of amorphization of at least 0.3 within a range within which an R value [R=I1350/I1580] (I1350 is the intensity of Raman around 1350 cm−1 and I1580 is the intensity of Raman around 1580 cm−1) of a Raman spectrum is in the range of 0.30 to 1.0.
Claims14
An anode active material for lithium secondary batteries, comprising natural graphite particles comprising spherical particles of agglomerated graphite sheets, outer surfaces of which are not coated with a carbon-based material, wherein the surfaces of the particles have a degree of amorphization of at least 0.3 within a range within which an R value [R=I1350/I1580] (I1350 is an intensity of Raman around 1350 cm−1 and I1580 is an intensity of Raman around 1580 cm−1) of a Raman spectrum is in a range of 0.30 to 1.0.
Dependencies are inferred from the claim text.