公开(公告)号：US20220314183A1

公开(公告)日：2022-10-06

申请号：US17710456

申请日：2022-03-31

Applicant: California Institute of Technology

Inventor： Daryl Wei Liang YEE ,  Julia R. GREER ,  Max L. LIFSON ,  Michael A. CITRIN

IPC: B01J13/00 ,  H01M4/48 ,  G03F7/004 ,  G03F7/00 ,  B01J6/00 ,  G03F7/032 ,  C08G65/00 ,  C08K3/28 ,  G03F7/20 ,  H01M4/133

Abstract: In an aspect, a method for making a metal-containing material comprises steps of: forming a metal-containing hydrogel from an aqueous precursor mixture using a photopolymerization; wherein the aqueous precursor mixture comprises water, one or more aqueous photosensitive binders, and one or more aqueous metal salts; and thermally treating the metal-containing hydrogel to form the metal-containing material; wherein the metal-containing hydrogel is exposed to a thermal-treatment atmosphere during the step of thermally treating; wherein a composition of the metal-containing material is at least partially determined by a composition of the thermal-treatment atmosphere during the thermally treating step.

公开(公告)号：US20190103600A1

公开(公告)日：2019-04-04

申请号：US16151186

申请日：2018-10-03

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Julia R. GREER ,  Andrey VYATSKIKH ,  John S. THORNE ,  Akira KUDO ,  Kai NARITA ,  Michael A. CITRIN ,  Xuan ZHANG

IPC: H01M4/133 ,  H01M4/587 ,  H01M4/62 ,  H01M4/1393 ,  H01G11/26 ,  H01G11/34 ,  H01G11/84

Abstract: In an aspect, an electrode for an electrochemical cell comprises: a structure having a nano- or micro-architected three-dimensional geometry; said structure comprising one or more active carbon allotrope materials; wherein said structure is characterized by an average density less than or equal to 2.3 g cm−3 and an average specific strength (strength-to-density ratio) greater than or equal to 0.004 GPa g−1 cm3. Also disclosed herein are methods for making an electrode for an electrochemical cell, and methods for making an electrochemical cell.

公开(公告)号：US20220336933A1

公开(公告)日：2022-10-20

申请号：US17718705

申请日：2022-04-12

Applicant: California Institute of Technology

Inventor： Kai NARITA ,  Julia R. GREER

IPC: H01M50/569

Abstract: A method of interrogating an electrochemical cell includes: applying a positive direct current to the electrochemical cell for a first time period, wherein the positive direct current is characterized by a first magnitude; applying a negative direct current to the electrochemical cell for a second time period, wherein the negative direct current is characterized by a second magnitude; wherein the first and second time periods have a combined duration of less than 2 seconds; wherein the second magnitude is equal to or within 50% of the first magnitude; recording cell resistance data of the electrochemical cell during each time period; and analyzing the cell resistance data to determine at least one of: (i) state of charge of the electrochemical cell; (ii) state of health of the electrochemical cell; and (iii) the resistance anisotropy of the cell.

公开(公告)号：US20200156035A1

公开(公告)日：2020-05-21

申请号：US16577253

申请日：2019-09-20

Applicant: California Institute of Technology

Inventor： Daryl Wei Liang YEE ,  Julia R. GREER ,  Max L. LIFSON ,  Michael A. CITRIN

IPC: B01J13/00 ,  H01M4/133 ,  H01M4/48 ,  G03F7/004 ,  G03F7/00 ,  B01J6/00 ,  G03F7/032 ,  C08G65/00 ,  C08K3/28 ,  G03F7/20

Abstract: In an aspect, a method for making a metal-containing material comprises steps of: forming a metal-containing hydrogel from an aqueous precursor mixture using a photopolymerization; wherein the aqueous precursor mixture comprises water, one or more aqueous photosensitive binders, and one or more aqueous metal salts; and thermally treating the metal-containing hydrogel to form the metal-containing material; wherein the metal-containing hydrogel is exposed to a thermal-treatment atmosphere during the step of thermally treating; wherein a composition of the metal-containing material is at least partially determined by a composition of the thermal-treatment atmosphere during the thermally treating step.

公开(公告)号：US20230024854A1

公开(公告)日：2023-01-26

申请号：US17862916

申请日：2022-07-12

Applicant: California Institute of Technology

Inventor： Ye SHI ,  Julia R. GREER ,  Harry A. ATWATER ,  Ognjen ILIC

IPC: B01D69/14 ,  B01D53/26 ,  B01D61/36 ,  B01D71/38 ,  B01D69/02 ,  C02F1/44

Abstract: A membrane for water collection may include a sheet having a top surface and a bottom surface, and a plurality of conical structures disposed on the top surface of the sheet, the conical structures comprising a hydrogel material. Each conical structure of the plurality of conical structures may have a height of 1 mm to 50 mm, wherein height is measured from the top surface of the sheet to an apex of a conical structure. Each conical structure of the plurality of conical structures may have an apex angle of 10 to 60 degrees.

公开(公告)号：US20210340334A1

公开(公告)日：2021-11-04

申请号：US17032539

申请日：2020-09-25

Applicant: California Institute of Technology

Inventor： Carlos M. PORTELA ,  Daryl Wei Liang YEE ,  Dennis M. KOCHMANN ,  Julia R. GREER

IPC: C08J3/02 ,  C08J9/26 ,  C23C16/455 ,  C23C16/40

Abstract: In an aspect, provided herein are low density materials, including shell-based materials, with three-dimensional architectures formed, in part, via self-assembly processes. Shell-based materials of some embodiments exhibit a combination of ultralow density (e.g., ≤100 mg cm−3 and optionally ≤10 100 mg cm−3) and non-periodic architectures characterized by low defect densities and geometries avoiding stress concentrations. Low density shell based materials of some embodiments have architectures characterized by small curvatures and lack of straight edges providing enhance mechanical response. In some embodiments, for example, the present low density materials, including shell-based materials, providing a combination target mechanical properties including high stiffness-to-density ratios, mechanical resilience and tolerance for deformation.

公开(公告)号：US20200023584A1

公开(公告)日：2020-01-23

申请号：US16206163

申请日：2018-11-30

Applicant: California Institute of Technology

Inventor： Carlos M. PORTELA ,  Andrey VYATSKIKH ,  Julia R. GREER

IPC: B29C64/30 ,  B29C64/10 ,  B33Y10/00 ,  B33Y80/00 ,  B33Y40/00

Abstract: In an aspect, a composite material system comprises: a structure having an architected three-dimensional geometry; wherein said three-dimensional geometry is monolithic and deterministic; and a matrix phase; wherein said matrix phase at least partially infiltrates said structure. In some embodiments, the three-dimensional geometry is a nano- or micro-architected three-dimensional geometry.