Titles:
Lithium metal battery electrolyte and lithium metal secondary battery
一种锂金属电池电解液及其锂金属二次电池
Abstracts:
The present invention relates to an electrolyte for a lithium metal battery and a lithium metal secondary battery, and more specifically to a lithium salt including lithium nitrate and lithium bisfluoromethanesulfonimide; a film-forming additive; Water organic solvents; sulfoxide compounds and derivatives thereof represented by general formula (I): wherein R1-R2 are each independently selected from: substituted or unsubstituted C1-C6 hydrocarbon groups. The lithium nitrate generates an interface film composed of Li3N and LiNxOy, and the sulfoxide compound decomposes to generate sulfur element, which can effectively coordinate the formation of the interface film and reduce the occurrence of negative side reactions. The lithium bisfluoromethanesulfonimide in the electrolyte is not only used to provide the lithium salt of the electrolyte, but also the anion of the lithium bisfluoromethanesulfonimide and the sub-maple compound act together, which is beneficial to the interface film on the lithium metal surface The formation of the battery, thereby further improving the cycle performance of the battery.
Titles:
Metal lithium composite material and preparation method thereof
一种金属锂复合材料及其制备方法
Abstracts:
The present invention provides a method for preparing a metal lithium composite material, which includes: S1) heating and mixing a lithium-philic oxide with pure lithium, cooling and rolling to obtain a metal lithium modified foil; The organic solution of the metal salt is immersed to obtain the treated three-dimensional conductive material; S2) After the metal lithium modified foil material is mechanically combined with the treated three-dimensional conductive material, heat treatment is performed in a protective atmosphere to obtain a metal Lithium composite material. Compared with the prior art, the present invention pre-mixes pure lithium with a lithium-philic material that can improve the cycle of lithium metal negative electrodes, and the prepared metal-lithium composite material can be directly used as the negative electrode of lithium batteries, which improves the use efficiency of metal lithium and provides structural support. Prevent metal lithium from powdering during the cycle, improve the cycle performance of the battery, and also reduce the interface lithium ion transmission impedance, effectively reducing battery polarization.
Titles:
Negative sheet, preparation method thereof and solid-state battery
一种负极片及其制备方法和固态电池
Abstracts:
The invention provides a negative electrode sheet, a preparation method thereof, and a solid state battery. The negative electrode sheet includes a metal sheet and a carbon protective layer on the surface of the metal sheet, and the carbon protective layer is obtained by carbonizing a polymer with a laser. The preparation method includes: 1) attaching a polymer film on the surface of the metal sheet to obtain the attached metal sheet; 2) performing laser scanning on the polymer film on the attached metal sheet to obtain the negative electrode sheet. In the negative electrode sheet provided by the present invention, the carbon protective layer is dense, uniform and stable in structure, and the protective layer has extremely high purity. At the same time, the volume change of the metal negative electrode can be suppressed, and the cycle performance of the solid state battery can be improved. The preparation method provided by the present invention directly forms a carbon protective layer by carbonizing a polymer film at a high temperature on the metal surface with uniform thickness, high purity and high mechanical strength.
