LITHIUM-SULFUR BATTERY HAVING HIGH ENERGY DENSITY

Title:

LITHIUM-SULFUR BATTERY HAVING HIGH ENERGY DENSITY

Document Type and Number:

WIPO Patent Application WO/2023/211164

Kind Code:

A1

Abstract:

Disclosed is a lithium-sulfur battery having a high energy density, using a sparingly solvating electrolyte (SSE) system (discharge capacity, up to 1,600 mAh/gs) rather than a conventional catholyte electrolyte system (discharge capacity, up to 1,200 mAh/gs) and not using a nitrile-based solvent so as to utilize at least 80% of the theoretical discharge capacity (1,675 mAh/g) of sulfur, and also using a cathode carbon material having a high specific surface area, thereby even implementing excellent lifespan performance. The lithium-sulfur battery comprises: an electrolyte, which includes a first solvent containing a fluorine-based ether compound, a second solvent containing a glyme-based compound, and a lithium salt; and a cathode including sulfur and a carbon material as active materials thereof, wherein the carbon material comprises two or more types of carbon materials having different average pore sizes.

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Inventors:

PARK INTAE (KR)
KIM YONGHWI (KR)
CHOI RAN (KR)
LEE CHANGHOON (KR)
LEE HYUNSOO (KR)
SONG MYEONGJUN (KR)
PARK SEONGHYO (KR)

Application Number:

PCT/KR2023/005726

Publication Date:

November 02, 2023

Filing Date:

April 27, 2023

Export Citation:

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Assignee:

LG ENERGY SOLUTION LTD (KR)

International Classes:

H01M10/052; H01M4/02; H01M4/36; H01M4/38; H01M4/62; H01M10/0569

Foreign References:

KR20220043310A	2022-04-05
CN103840125A	2014-06-04
KR20220008347A	2022-01-20
US10147938B2	2018-12-04
KR20220052496A	2022-04-28

Other References:

LI HAIPENG; SUN LIANCHENG; ZHANG YONGGUANG; TAN TAIZHE; WANG GONGKAI; BAKENOV ZHUMABAY: "Enhanced cycle performance of Li/S battery with the reduced graphene oxide/activated carbon functional interlayer", JOURNAL OF ENERGY CHEMISTRY, ELSEVIER, AMSTERDAM, NL, vol. 26, no. 6, 2017, AMSTERDAM, NL , pages 1276 - 1281, XP085248281, ISSN: 2095-4956, DOI: 10.1016/j.jechem.2017.09.009

Attorney, Agent or Firm:

KIM, Sung Ho (KR)

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