Title:
LITHIUM ANODE SURFACE MODIFICATION METHOD FOR LITHIUM METAL BATTERY AND LITHIUM METAL BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/148913
Kind Code:
A1
Abstract:
Disclosed are a lithium anode surface modification method for a lithium metal battery and a lithium metal battery. The modification method comprises the following steps: immersing, in a dry protective gas atmosphere, a lithium metal anode in a fluorine ion-containing liquid, or smearing a fluorine ion-containing liquid on a surface of the lithium metal anode; after fluorination and removal, a protective layer rich in lithium fluoride is formed on the surface of the lithium metal anode, and a lithium metal-coated lithium metal anode is obtained. The lithium fluoride protective layer obtained by the surface fluorination of the invention is highly uniform and dense, so as to reduce the consumption of lithium metal and electrolyte and inhibit the formation of lithium dendrite, such that the lithium metal anode has the advantages of higher discharge specific capacity, longer cycle life and better safety performance. The invention achieves stability and high efficiency of a lithium metal battery during long cycle processes, as well as the operational requirements of high energy and high power of a power battery, conducive to promotion of an industrialization process for lithium metal batteries and having broad application prospects.
Inventors:
XIONG XUNHUI (CN)
WANG GANG (CN)
YANG CHENGHAO (CN)
LIN ZHIHUA (CN)
LIN ZHANG (CN)
LIU MEILIN (CN)
WANG GANG (CN)
YANG CHENGHAO (CN)
LIN ZHIHUA (CN)
LIN ZHANG (CN)
LIU MEILIN (CN)
Application Number:
PCT/CN2018/113217
Publication Date:
August 08, 2019
Filing Date:
October 31, 2018
Export Citation:
Assignee:
UNIV SOUTH CHINA TECH (CN)
International Classes:
H01M4/1395; H01M4/134; H01M10/0525; H01M10/42; H01M50/409
Foreign References:
| CN108448058A | 2018-08-24 | |||
| CN107359310A | 2017-11-17 | |||
| CN105280886A | 2016-01-27 | |||
| CN107394115A | 2017-11-24 |
Other References:
RONGRONG MIAO: "Novel dual-salts electrolyte solution for dendrite-free lithium-metal based rechargeable batteries with high cycle reversibility", JOURNAL OF POWER SOURCES, vol. 27, 10 August 2014 (2014-08-10), pages 291 - 297, XP029055245, ISSN: 0378-7753, doi:10.1016/j.jpowsour.2014.08.011
Attorney, Agent or Firm:
YOGO PATENT & TRADEMARK AGENCY LIMITED COMPANY (CN)
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