Ceramic nanowire battery separators
AssigneeNovarials Corporation
InventorsXinjie Zhang, Kuiyang Jiang
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Abstract
This invention relates to novel battery separators comprising ceramic nanowires, more specifically, inorganic carbonate nanowires. The novel ceramic nanowire separators are suited for use in lithium batteries, such as lithium ion rechargeable, lithium metal rechargeable and lithium sulfur rechargeable batteries, and provide high safety, high power density, and long cycle life to the fabricated rechargeable batteries. The battery separators comprise ceramic nanowires that may be optionally bonded together by organic polymer binders and/or may further comprise organic nanofibers.
Claims20
A rechargeable battery comprising:
- an anode;
- a cathode;
- and
- a battery separator disposed between the anode and the cathode, wherein the battery separator comprises dihydroxyaluminum sodium carbonate nanowires.
A method for preparing a battery separator of a rechargeable battery, the method comprising:
- processing a nanowire slurry comprising dihydroxyaluminum sodium carbonate nanowires and water, including preparing the nanowires by a hydrothermal growth process;
- wherein the hydrothermal growth process comprises:
- adding deionized water, sodium bicarbonate and sodium hydroxide to a blender and blended to form a solution;
- adding sodium hydroxide to the solution to adjust the pH of the solution to be in a range from 10 to 11;
- adding aluminum isopropoxide and blended to form a slurry;
- transferring the slurry into a pressure vessel;
- heating the pressure vessel to an elevated temperature for 12 to 96 hours;
- and
- cooling the pressure vessel to room temperature, and producing the dihydroxyaluminum sodium carbonate nanowires;
- wherein the nanowire slurry is prepared by milling the dihydroxyaluminum sodium carbonate nanowires and water through a three roll mill.
A battery separator comprising dihydroxyaluminum sodium carbonate nanowires and one or more organic polymer binders.
Dependencies are inferred from the claim text.