Titles:
Lithium film for supplementing lithium on negative electrode, and preparation device, preparation method and application thereof
一种用于负极补锂的锂膜及其制备装置、制备方法和应用
Abstracts:
The invention relates to the field of lithium batteries, and discloses a lithium film for supplementing lithium in a negative electrode, and a preparation device, preparation method and application thereof. The lithium film of the present invention includes a base film and a lithium layer, the thickness of the lithium layer is 1-10 μm; the thickness of the base film is 6-20 μm, which is prepared by the apparatus and method for preparing the lithium film mentioned in the present invention. A lithium battery in which the lithium film of the present invention is applied to the negative electrode is provided. The lithium film of the present invention has the characteristics of uniform thickness, easy production, and recycling of the base film; during the preparation of the lithium film, the voltage, the propulsion rate of the syringe pump, the choice of solvent, and the time for spraying the liquid agent of the nozzle to control the lithium layer can be controlled. Uniformity and thickness control the surface morphology of the lithium layer; at the same time, the preparation method mentioned in the present invention can also solve the problem of poor uniformity of the existing lithium film, difficult to control accuracy, and local surplus lithium residues that may cause safety hazards in the subsequent negative electrode rolling process Wait.
The present invention pertains to an anode-less lithium ion battery comprising a) a cathode comprising a cathode current collector and a cathode electro-active material on the cathode current collector; b) an anode current collector; c) a liquid electrolyte composition between the a) cathode and the b) anode current collector; and d) a separator, wherein the c) liquid electrolyte composition comprises i) at least 70% by volume (vol%) of a solvent mixture with respect to the total volume of the electrolyte composition, comprising at least one fluorinated ether compound and at least one non-fluorinated ether compound, and ii) at least one lithium salt.
Applicant:
SOLVAY [BE]
Inventors:
CHOI JI-AE [KR]
MULLER GUILLAUME [KR]
HOUGH LAWRENCE ALAN [KR]
LEE HYUN-CHEOL [KR]
CHOI HEE-SUNG [KR]
LEE SO-YOUNG [KR]
Other family members:
WO 2021213743 A1,
Pub. Date: 2021-10-28,
EPO/ Google
Titles:
Metal negative electrode, preparation method thereof and secondary battery
金属负极及其制备方法和二次电池
Abstracts:
The embodiments of the present application provide a metal negative electrode. The metal negative electrode includes a metal negative electrode body and a protective layer formed on one or both sides of the metal negative electrode body. The protective layer is composed of a liquid or gel inner layer with the ability to dissolve alkali metals and It is composed of a solid outer layer with high ionic conductivity. The liquid or gel state inner layer with the ability to dissolve alkali metals includes at least one of aromatic hydrocarbon small molecule compounds with the ability to accept electrons and polymers containing aromatic hydrocarbon groups, and a lithium ion complex complex At least one of ether type small molecule solvents, amine type small molecule solvents, thioether type small molecule solvents, polyether type polymers, polyamine type polymers and polysulfide type polymers. The protective layer on the surface of the metal negative electrode can effectively inhibit the growth of dendrites on the surface of the alkali metal negative electrode during the charging and discharging process of the battery and the battery safety and life problems caused by the dendrites. The application also provides a preparation method of the metal negative electrode and a secondary battery.
