Separator for a battery, battery and method for producing a separator
AssigneeINL - International Iberian Nanotechnology Laboratory
InventorsLiu LIFENG, Tai ZHIXIN
Life of this patent
Estimating the term…
Abstract
A separator for a battery comprising: a porous glass fiber substrate having a first major surface and an opposing second major surface, and particles of a negatively charged polymer, wherein the particles are distributed in the porous glass fiber substrate such that a concentration of the particles increases throughout a thickness of the porous glass fiber substrate from the first major surface to the second major surface thereof. Further relating to a battery comprising the separator and a method for producing the separator.
Claims15
A separator for an alkali metal battery comprising:
- a porous glass fiber substrate having a first major surface and an opposing second major surface, and
- particles of a negatively charged polymer selected from the group consisting of:
- fluorine-containing polymers, chlorine-containing polymers, carboxylic acid-containing polymers, sulfonate-containing polymers, amide bond group-based polymers, and polyester-based polymers, and salts, derivatives and composites thereof,
- wherein the particles are distributed in the porous glass fiber substrate such that a concentration of the particles increases throughout a thickness of the porous glass fiber substrate from the first major surface to the second major surface thereof.
The separator according to claim 9, wherein the areal number density of the particles at the second major surface ranges from 0.5×107-4×107 particles per square millimeter, and wherein the particles have an average extension of 210 nm.
Dependencies are inferred from the claim text.