Title:
IRON-CONTAINING LITHIUM POLYSULFIDE
Document Type and Number:
WIPO Patent Application WO/2024/096075
Kind Code:
A1
Abstract:
In the present invention, iron-containing lithium polysulfide contains lithium, iron, and sulfur as constituent elements, wherein: lithium sulfide (Li2S) is included as the main phase; the crystallite size that is calculated from the half-width of a diffraction peak that is based on the (111) plane of the Li2S obtained by powder X-ray diffraction is 50 nm or less; and, taking the total iron-containing lithium polysulfide content to be 100 at%, the Li content is 50–70 at%, the Fe content is 2–12 at%, the S content is 20–40 at%, the C content is 0–5 at%, and the halogen content is 0–0.8 at%. In a compound that has lithium sulfide as a main component and is useful as a positive electrode active material for a lithium-ion secondary battery, said iron-containing lithium polysulfide is a material that has a high lithium sulfide use rate, high capacitance, and excellent rate properties.
Inventors:
TAKEUCHI TOMONARI (JP)
SAKAEBE HIKARI (JP)
OTOYAMA MISAE (JP)
KURATANI KENTARO (JP)
SAKAEBE HIKARI (JP)
OTOYAMA MISAE (JP)
KURATANI KENTARO (JP)
Application Number:
PCT/JP2023/039491
Publication Date:
May 10, 2024
Filing Date:
November 01, 2023
Export Citation:
Assignee:
AIST (JP)
International Classes:
H01M4/58; C01G49/00; H01M10/052; H01M10/0562
Domestic Patent References:
| WO2019130863A1 | 2019-07-04 | |||
| WO2016080443A1 | 2016-05-26 | |||
| WO2019039582A1 | 2019-02-28 | |||
| WO2010084808A1 | 2010-07-29 | |||
| WO2015037598A1 | 2015-03-19 |
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
Download PDF: