Lithium secondary battery
AssigneeLG Energy Solution, Ltd.
InventorsMinsu Kim, Kwonnam Sohn, Dongwook Lee
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Abstract
A lithium secondary battery is provided and, more specifically, a lithium secondary battery comprising a cathode catalyst including a transition metal composite having a stable structure in which four nitrogens are bonded to the transition metal as a cathode catalyst for a reduction reaction of sulfur generated during operation of the lithium secondary battery having a sulfur-containing material included in a cathode thereof, thereby improving performance and longevity of the battery.
Claims15
A lithium secondary battery comprising:
- a positive electrode comprising a sulfur-containing material;
- a negative electrode;
- a separator interposed between the positive electrode and the negative electrode;
- and
- an electrolyte solution,
- wherein the positive electrode further comprises a current collector and a positive electrode active material layer on the current collector, wherein the positive electrode active material layer comprises a positive electrode active material, and a positive electrode catalyst is contained in the positive electrode active material layer, wherein the positive electrode catalyst comprises a transition metal composite bonded to a surface of a porous carbon, wherein the transition metal composite comprises four nitrogen atoms bonded to the transition metal, and wherein the positive electrode catalyst is present in an amount of 20% by weight to 30% by weight based on a total weight of the positive electrode active material.
A lithium secondary battery comprising:
- a positive electrode comprising a sulfur-containing material;
- a negative electrode;
- a separator interposed between the positive electrode and the negative electrode;
- and
- an electrolyte solution,
- wherein the positive electrode further comprises a positive electrode catalyst comprising a transition metal composite bonded to a surface of a porous carbon, wherein the transition metal composite comprises four nitrogen atoms bonded to the transition metal, and wherein the transition metal composite is present in an amount of 1% by weight to 20% by weight based on a total weight of the positive electrode catalyst.
A positive electrode catalyst comprising:
- a transition metal composite bonded to a surface of a porous carbon,
- wherein the transition metal composite comprises four nitrogen atoms bonded to the transition metal, and
- wherein the transition metal composite is present in an amount of 1% by weight to 20% by weight based on a total weight of the positive electrode catalyst.
Dependencies are inferred from the claim text.