Negative active material for rechargeable lithium battery and rechargeable lithium battery including same
AssigneeSamsung SDI Co., Ltd.
InventorsEunjoo Lee, Narae Kim, Joongho Moon, Sunil Park
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Abstract
A rechargeable lithium battery includes a negative active material including: a secondary particle including a core in which a plurality of primary particles are agglomerated, the primary particles including a natural graphite; and a coating layer including amorphous carbon and surrounding the core, wherein a Raman peak intensity ratio of a D peak (1350 cm−1 to 1370 cm−1) to a D′ peak (1570 cm−1 to 1620 cm−1) (ID/ID′) of the negative active material is about 3.2 to about 3.8, and a lattice constant La of the negative active material is about 30 nm to about 45 nm.
Claims10
A negative active material for a rechargeable lithium battery, the negative active material comprising:
- a secondary particle comprising a core, the core comprising a plurality of primary particles that are agglomerated, each of the plurality of primary particles comprising a natural graphite;
- and
- a coating layer comprising amorphous carbon and surrounding the core,
- wherein a Raman peak intensity ratio of a D peak (1350 cm−1 to 1370 cm−1) to a D′ peak (1570 cm−1 to 1620 cm−1) (ID/ID′) of the negative active material is about 3.2 to about 3.8, and
- a lattice constant La of the negative active material is about 30 nm to about 45 nm.
Dependencies are inferred from the claim text.