Titles:
NEGATIVE ELECTRODE PLATE, LITHIUM METAL BATTERY, AND DEVICE COMPRISING LITHIUM METAL BATTERY
一种负极极片、锂金属电池及包含锂金属电池的装置
Abstracts:
A negative electrode plate, a lithium metal battery, and a device comprising the lithium metal battery. The negative electrode plate comprises a negative electrode current collector and a lithium metal negative electrode disposed on at least one surface of the negative electrode current collector; a polymer protection film is provided on the surface of the lithium metal negative electrode distant from the negative electrode current collector; the polymer protection film comprises a citric acid copolymer, and the number average molecular weight (Mn) of the citric acid copolymer is 10,000-1,000,000. A polymer protection film having high tensile strength, high puncture strength, high elongation, and high solid-liquid capacity can be formed on a surface of a lithium metal negative electrode in the negative electrode plate, and the use of the negative electrode plate in a lithium metal secondary battery can effectively slow down or even inhibit the growth of lithium dendrites, reduce consumption caused by side reactions between an electrolyte and lithium metal, improve the initial charge/discharge coulombic efficiency of the lithium metal secondary battery, and significantly improve the cycle stability and safety of the lithium metal secondary battery.
Title:
Liquid Electrolyte For Lithium Metal Battery
Abstract:
Liquid electrolytes for a lithium metal battery comprise an aprotic solvent, an ionic liquid, a lithium salt, 8 mol % to 30 mol % hydrofluoroether and up to 5 mol % additives. A molar ratio of the hydrofluoroether to the lithium salt is 0.22:1 to 0.83:1. The liquid electrolytes achieve at least a 50% improvement in cycle life over conventional electrolytes, extend capacity retention and delay increases in internal resistance.
Applicant:
APPLE INC [US]
Inventors:
RITCHIE ALAN A [US]
NEUDECKER BERND JURGEN [US]
BROWN KARL M [US]
BASILE ANDREW [US]
Titles:
Asynchronous heating and rolling device, large-width ultra-thin metal lithium foil, and preparation method and application thereof
一种异步加热延压装置、大宽幅超薄金属锂箔及其制备方法和应用
Abstracts:
The invention provides an asynchronous heating and rolling device, a large-width ultra-thin metal lithium foil, and a preparation method and application thereof. The asynchronous heating and rolling device includes a traction substrate unwinding unit for unwinding the traction substrate; a lithium belt The unwinding unit is used to unwind the lithium belt; the asynchronous heating and calendering unit includes a first calender roll, a second calender and a heating box; the heating box is used to heat the first calender roll; The first calender roller heats the traction substrate; the axis of the first calender roller and the second calender roller are parallel and opposite to each other, so that the traction substrate and the lithium belt are combined into a composite belt; the winding unit, Used to rewind composite tape. The device can produce a large and wide ultra-thin metal lithium foil with a uniform thickness by setting a heating box and asynchronous first and second rolling rolls; the lithium foil has a high primary effect when applied to batteries. The width of the lithium foil is 1 to 600 mm; the thickness of the lithium foil is 1 to 20 μm; the first efficiency of the battery is as high as 98%.
