Negative electrode for lithium secondary battery and lithium secondary battery including the same
OwnerSun Young Shin, Je Young Kim +1inventors
InventorsSun Young Shin, Je Young Kim, Yong Ju Lee
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Abstract
The present invention relates to a negative electrode for a lithium secondary battery and a lithium secondary battery including the negative electrode, wherein, since the negative electrode of the present invention includes a silicon oxide (SiOx, 0<x<2) composite containing magnesium (Mg) in a negative electrode active material and optimizes a type and an amount of a conductive agent, the lithium secondary battery including the negative electrode may improve a decrease in early-cycle capacity and high-temperature storage performance.
Claims14
A negative electrode for a lithium secondary battery, comprising a negative electrode collector and a negative electrode active material layer disposed on the negative electrode collector, wherein the negative electrode active material layer comprises:
- a negative electrode active material including a silicon oxide (SiOx, 0<x<2) composite containing magnesium (Mg);
- a first conductive agent comprising carbon nanotubes (CNTs);
- and
- a second conductive agent comprising at least one of a point-type conductive agent or a flaky graphite-based conductive agent,
- wherein an amount of the carbon nanotubes (CNTs) is in a range of 0.5 wt % to 1.7 wt % based on a total weight of the negative electrode active material layer, and
- a product of an amount (wt %) and a Brunauer-Emmett-Teller (BET) specific surface area (m2/g) of the second conductive agent has a value of 100 or less.
Dependencies are inferred from the claim text.