Separators for electrochemical cells
AssigneeOptodot Corporation
InventorsSteven Allen Carlson, Ifenna Kingsley Anakor
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Abstract
Provided are separators for use in an electrochemical cell comprising (a) an inorganic oxide and (b) an organic polymer, wherein the inorganic oxide comprises organic substituents. Preferably, the inorganic oxide comprises an hydrated aluminum oxide of the formula Al2O3.xH2O, wherein x is less than 1.0, and wherein the hydrated aluminum oxide comprises organic substituents, preferably comprising a reaction product of a multifunctional monomer and/or organic carbonate with an aluminum oxide, such as pseudo-boehmite and an aluminum oxide. Also provided are electrochemical cells comprising such separators.
Claims15
A continuous microporous separator layer for an electrochemical cell, wherein said continuous microporous separator layer has a thickness greater than two microns and comprises (a) organically-modified aluminum boehmite particles and (b) an organic polymer, wherein said organically-modified aluminum boehmite particles comprise aluminum boehmite particles covalently bonded to an organic material selected from the group consisting of:
- organic carbonates and divinyl ethers of an ethylene glycol.
An electrochemical cell comprising an anode, a cathode, and a continuous microporous separator layer interposed between said anode and said cathode, wherein said continuous microporous separator layer has a thickness greater than two microns and comprises (a) organically-modified aluminum boehmite particles and (b) an organic polymer, wherein said organically-modified aluminum boehmite particles comprise aluminum boehmite particles covalently bonded to an organic material selected from the group consisting of:
- organic carbonates and divinyl ethers of an ethylene glycol.
A continuous microporous separator layer having a thickness greater than two microns, the continuous layer comprising an aluminum boehmite particle, an organic polymer, and an organic material that is not the organic polymer, the organic material selected from the group consisting of:
- organic carbonates and divinyl ethers of an ethylene glycol, wherein the aluminum boehmite particle and the organic material form a covalently-bonded organically-modified aluminum boehmite particle.
Dependencies are inferred from the claim text.