公开(公告)号：US20240304942A1

公开(公告)日：2024-09-12

申请号：US18596588

申请日：2024-03-05

Applicant: Meta Materials Inc.

Inventor： Chandrakant C. Patel ,  Steven A. Carlson

IPC: H01M50/403 ,  H01M4/133 ,  H01M4/587 ,  H01M50/426 ,  H01M50/446 ,  H01M4/02

CPC classification number: H01M50/403 ,  H01M4/133 ,  H01M4/587 ,  H01M50/426 ,  H01M50/446 ,  H01M2004/021

Abstract: A separator for a lithium battery is a coating of an inorganic oxide (for example, aluminum oxide) and an organic polymer (for example, polyvinylidene difluoride (PVdF)). In a method, the separator is formed on an electrode material layer (for example, graphite) of an anode electrode. In a first pre-wetting step, a first liquid comprising a first volatile liquid is applied to the electrode material such that pores in the material are filled. In a second step, a second liquid is applied over the first liquid. The second liquid includes inorganic oxide particles and the organic polymer dispersed in a second volatile liquid. The first and second volatile liquids are then substantially removed (for example, by evaporation in a drying oven) thereby leaving the separator coating on the electrode material of the anode, and leaving the pores filled with a gel or solid electrolytic polymer material.

公开(公告)号：US20220352598A1

公开(公告)日：2022-11-03

申请号：US17861535

申请日：2022-07-11

Applicant: Meta Materials Inc.

Inventor： David W. Avison ,  Shreyans Shingi ,  Chandrakant C. Patel ,  Charles R. Comeau, JR. ,  Samuel Lim

IPC: H01M50/446 ,  H01M10/0525 ,  C08J5/22 ,  C08K3/00 ,  H01M50/403 ,  H01M50/463 ,  B29C41/00 ,  B29C41/02 ,  B29C71/02 ,  C09K5/08

Abstract: Nanoporous composite separators are disclosed for use in batteries and capacitors comprising a nanoporous inorganic material and an organic polymer material. The inorganic material may comprise Al2O3, AlO(OH) or boehmite, AlN, BN, SiN, ZnO, ZrO2, SiO2, or combinations thereof. The nanoporous composite separator may have a porosity of between 35-50%. The average pore size of the nanoporous composite separator may be between 10-90 nm. The separator may be formed by coating a substrate with a dispersion including the inorganic material, organic material, and a solvent. Once dried, the coating may be removed from the substrate, thus forming the nanoporous composite separator. A nanoporous composite separator may provide increased thermal conductivity and dimensional stability at temperatures above 200° C. compared to polyolefin separators.