IP Library › Granted Patent US 11,631,842
Granted Patent B2
US 11,631,842 · App. 17/745,172 · Granted Apr 18, 2023

Porous carbon, and positive electrode and lithium secondary battery comprising same

Inventors: Dongwook Lee (Daejeon, KR); Changshin Jo (Busan, KR); Jinwoo Lee (Pohang-si, KR); Kwonnam Sohn (Daejeon, KR); Doo Kyung Yang (Daejeon, KR); Won-Gwang Lim (Pohang-si, KR)
Assignees: LG ENERGY SOLUTION, LTD.; POSTECH ACADEMY-INDUSTRY FOUNDATION
H01M4/362C01B32/05H01M4/38H01M4/625H01M10/0525C01P2004/32C01P2004/61C01P2006/12C01P2006/14C01P2006/17C01P2006/40H01M2004/021H01M2004/028
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Quick Facts
Patent No.
US 11,631,842
App. No.
17/745,172
Granted
Apr 18, 2023
Kind
B2
Abstract

Porous carbon particles, and a positive electrode active material and a lithium secondary battery including the same. This may improve the energy density of the lithium secondary battery by applying a porous electrode containing micropores and mesopores and having a uniform size distribution and shape as a positive electrode material.

Claims (17)

1. A positive electrode for a lithium secondary battery comprising porous carbon particles, wherein the porous carbon particles comprise micropores having a diameter of 1 nm to 8 nm and mesopores having a diameter of 2 nm to 50 nm,

wherein the porous carbon particles are spherical particles having a particle diameter of 2 μm to 10 μm, and

wherein the porous carbon comprises the micropores and the mesopores in a pore volume ratio of 1:40 to 50.

2. The positive electrode according to claim 1 , wherein the porous carbon particles comprise micropores having a diameter of 0.1 nm to 1.8 nm.

3. The positive electrode according to claim 1 , wherein the porous carbon particles comprise micropores having a diameter of 0.3 nm to 1.5 nm.

4. The positive electrode according to claim 1 , wherein the porous carbon particles comprise mesopores having a diameter of 10 nm to 50 nm.

5. The positive electrode according to claim 1 , wherein the porous carbon particles comprise mesopores having a diameter of 30 nm to 50 nm.

6. The positive electrode according to claim 1 , wherein the porous carbon particles comprise mesopores having a diameter of 20 nm to 40 nm.

7. The positive electrode according to claim 1 , wherein the porous carbon particles are spherical particles having a particle diameter of 3 μm to 7 μm.

8. The positive electrode according to claim 1 , wherein the porous carbon particles are spherical particles having a particle diameter of 4 μm to 6 μm.

9. The positive electrode according to claim 1 , wherein the pore volume of mesopores is 3.5 cm 2 /g or more.

10. The positive electrode according to claim 1 , wherein the pore volume of mesopores is 3.5 cm 2 /g to 4.5 cm 2 /g.

11. The positive electrode according to claim 1 , wherein the pore volume of mesopores is 3.8 cm 2 /g to 4.2 cm 2 /g.

12. The positive electrode according to claim 1 , wherein the specific surface area of the porous carbon is 1000 m 2 /g to 1300 m 2 /g.

13. The positive electrode according to claim 1 , wherein the specific surface area of the porous carbon is 1150 m 2 /g to 1300 m 2 /g.

14. The positive electrode according to claim 1 , wherein the specific surface area of the porous carbon is 1200 m 2 /g to 1300 m 2 /g.

15. A lithium secondary battery comprising the positive electrode according to claim 1 .

Priority Claims (1)
KR 10-2017-0147765 · Nov 8, 2017 · national
Continuity (2)
Continuation 16646473
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