公开(公告)号：US20250046865A1

公开(公告)日：2025-02-06

申请号：US18921765

申请日：2024-10-21

Applicant: The Regents of The University of Michigan

Inventor： Jeffrey Sakamoto ,  Travis Thompson ,  Asma Sharafi ,  Nathan Taylor ,  Neil P. Dasgupta ,  Eric Kazyak

IPC: H01M10/0562 ,  H01M4/38 ,  H01M4/525 ,  H01M4/58 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/058

Abstract: A method is disclosed for suppressing propagation of a metal in a solid state electrolyte during cycling of an electrochemical device including the solid state electrolyte and an electrode comprising the metal. One method comprises forming the solid state electrolyte such that the solid state electrolyte has a structure comprising a plurality of grains of a metal-ion conductive material and a grain boundary phase located at some or all of grain boundaries between the grains, wherein the grain boundary phase suppresses propagation of the metal in the solid state electrolyte during cycling. Another method comprises forming the solid state electrolyte such that the solid state electrolyte is a single crystal.

公开(公告)号：US20190006707A1

公开(公告)日：2019-01-03

申请号：US16001407

申请日：2018-06-06

Applicant: The Regents of The University of Michigan

Inventor： Jeffrey Sakamoto ,  Travis Thompson ,  Asma Sharafi ,  Nathan Taylor ,  Neil P. Dasgupta ,  Eric Kazyak

IPC: H01M10/0562 ,  H01M10/0525 ,  H01M10/04 ,  H01M4/525

Abstract: A method is disclosed for suppressing propagation of a metal in a solid state electrolyte during cycling of an electrochemical device including the solid state electrolyte and an electrode comprising the metal. One method comprises forming the solid state electrolyte such that the solid state electrolyte has a structure comprising a plurality of grains of a metal-ion conductive material and a grain boundary phase located at some or all of grain boundaries between the grains, wherein the grain boundary phase suppresses propagation of the metal in the solid state electrolyte during cycling. Another method comprises forming the solid state electrolyte such that the solid state electrolyte is a single crystal.

公开(公告)号：US20250034706A1

公开(公告)日：2025-01-30

申请号：US18783878

申请日：2024-07-25

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Neil P. Dasgupta ,  Daniel Penley

IPC: C23C16/455 ,  C23C16/40 ,  C23C16/458 ,  C23C16/52

Abstract: An atomic layer deposition system comprises: a depositor head having an active surface configured to discharge a first precursor gas, a second precursor gas, and an inert gas that separates the first precursor gas and the second precursor gas; a substrate spaced apart from the active surface of the depositor head; an XY motion device operably coupled to the substrate or the depositor head; and a controller configured to execute a program stored in the controller to move the XY motion device such that the substrate or the depositor head moves in a path, wherein a position of the substrate relative to the depositor head varies in both an X direction and a Y direction when the substrate or the depositor head follows the path. Also disclosed are a method for atomic layer deposition, and a method for reducing non-uniformity of a film produced by atomic layer deposition.

公开(公告)号：US20200028208A1

公开(公告)日：2020-01-23

申请号：US16515562

申请日：2019-07-18

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Neil P. Dasgupta ,  Eric Francis Kazyak

IPC: H01M10/0562 ,  C23C16/455 ,  H01M10/0585

Abstract: A method of making an ionically conductive layer for an electrochemical device is disclosed. The method includes the steps of: (a) exposing a substrate to a lithium-containing precursor followed by an oxygen-containing precursor; and (b) exposing the substrate to a boron-containing precursor followed by the oxygen-containing precursor.

公开(公告)号：US20230361350A1

公开(公告)日：2023-11-09

申请号：US18143358

申请日：2023-05-04

Applicant: The Regents of The University of Michigan

Inventor： Neil P. Dasgupta ,  Yuxin Chen ,  Kuan-Hung Chen ,  Eric Kazyak

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M4/583 ,  H01M10/0569 ,  H01M4/04

CPC classification number: H01M10/0568 ,  H01M10/0525 ,  H01M4/583 ,  H01M10/0569 ,  H01M4/0435 ,  H01M4/0402 ,  H01M2300/0028

Abstract: A method for forming an electrochemical device may comprise the steps of: (a) exposing electrode material particles to a lithium-containing precursor followed by an oxygen-containing precursor to form a coating on the electrode material particles; (b) forming a slurry comprising the coated electrode material particles; (c) casting the slurry to form a layer; (d) calendering the layer to form one or more electrodes (anode and/or cathode); (e) positioning a separator between the anode and the cathode to form a cell structure; and (f) positioning the cell structure in a liquid electrolyte, wherein the electrolyte is essentially free of a solvent that forms a solid electrolyte interphase on the anode and/or cathode. The method reduces the need for slow, costly preconditioning to be performed following lithium-ion battery cell assembly, and enables the use of ethylene carbonate-free electrolytes, thereby improving cycling stability at high voltages for lithium-ion batteries.

公开(公告)号：US20230235450A1

公开(公告)日：2023-07-27

申请号：US18010978

申请日：2021-06-18

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Andrej Lenert ,  Neil P. Dasgupta ,  Zachary James Berquist ,  Andrew Gayle

IPC: C23C16/04 ,  C23C16/40 ,  C23C16/455 ,  F24S80/52 ,  F24S80/56

CPC classification number: C23C16/045 ,  C23C16/403 ,  C23C16/45527 ,  F24S80/52 ,  F24S80/56

Abstract: Thermally insulating materials (TIMs) for use in concentrated solar thermal (CST) technologies comprising a mesoporous oxide including a porous oxide matrix comprising a porous oxide and a metal oxide or metal nitride in the form of a conformal layer of the metal oxide or metal nitride on the surface of the porous oxide matrix, wherein the conformal layer completely covers the surface area of the porous oxide matrix, or in the form of metal oxide or metal nitride nanoparticles dispersed throughout the porous oxide matrix, or in the form of a conformal coating or nanoparticles, methods of preparing same, and solar devices comprising same.

公开(公告)号：US11377734B2

公开(公告)日：2022-07-05

申请号：US17182791

申请日：2021-02-23

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Neil P. Dasgupta ,  Jing Wang ,  Anish Tuteja

IPC: B63B59/04 ,  C23C16/455 ,  C23C16/40 ,  C23C16/56 ,  C23C28/02 ,  B82Y30/00 ,  B82Y35/00

Abstract: A rational design and fabrication of ZnO/Al2O3 core-shell nanowire architectures with tunable geometries (length, spacing, branching) and surface chemistry is provided. The fabricated nanowires significantly delay or even prevent marine biofouling. In some embodiments, hydrophilic nanowires can reduce the fouling coverage by up to approximately 60% after 20 days compared to planar control surfaces. The mechanism of the fouling reduction is mainly due to two geometric effects: reduced effective settlement area and mechanical cell penetration. Further, superhydrophobic nanowires can completely prevent marine algal fouling for up to 22 days. Additionally, the developed nanowire surfaces are transparent across the visible spectrum, making them applicable to windows and oceanographic sensors.

公开(公告)号：US12125967B2

公开(公告)日：2024-10-22

申请号：US16001407

申请日：2018-06-06

Applicant: The Regents of The University of Michigan

Inventor： Jeffrey Sakamoto ,  Travis Thompson ,  Asma Sharafi ,  Nathan Taylor ,  Neil P. Dasgupta ,  Eric Kazyak

IPC: H01M10/0562 ,  H01M4/38 ,  H01M4/525 ,  H01M4/58 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/058

CPC classification number: H01M10/0562 ,  H01M4/382 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/058 ,  H01M2300/0071

Abstract: A method is disclosed for suppressing propagation of a metal in a solid state electrolyte during cycling of an electrochemical device including the solid state electrolyte and an electrode comprising the metal. One method comprises forming the solid state electrolyte such that the solid state electrolyte has a structure comprising a plurality of grains of a metal-ion conductive material and a grain boundary phase located at some or all of grain boundaries between the grains, wherein the grain boundary phase suppresses propagation of the metal in the solid state electrolyte during cycling. Another method comprises forming the solid state electrolyte such that the solid state electrolyte is a single crystal.

公开(公告)号：US11145861B2

公开(公告)日：2021-10-12

申请号：US16094123

申请日：2017-04-17

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Neil P. Dasgupta ,  Kevin N. Wood ,  Kuan-Hung Chen ,  Eric Kazyak

IPC: H01M4/38 ,  H01M4/04 ,  H01M10/052 ,  H01M4/1395 ,  H01M4/134

Abstract: Disclosed are methods for pre-conditioning or pre-treating the surface of a metal (e.g., lithium) electrode such that the cycle life and efficiency of the electrode within an electrochemical cell are improved through the prevention of dendrite growth. The pretreatment process includes the use of an alternating current to modify the surface properties of the metal electrode, such that a more uniform flux of metal ions is transferred across the electrode-electrolyte Interface in subsequent electrodeposition and electrodissolution processes. As a result, an electrode treated with such a process exhibits improved performance and durability, including markedly lower overpotentials and largely improved metal (e.g., lithium) retention in strip plate tests as compared with untreated electrodes.

公开(公告)号：US20190131622A1

公开(公告)日：2019-05-02

申请号：US16094123

申请日：2017-04-17

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Neil P. Dasgupta ,  Kevin N. Wood ,  Kuan-Hung Chen ,  Eric Kazyak

IPC: H01M4/38 ,  H01M4/04 ,  H01M4/134 ,  H01M4/1395 ,  H01M10/052

Abstract: Disclosed are methods for pre-conditioning or pre-treating the surface of a metal (e.g., lithium) electrode such that the cycle life and efficiency of the electrode within an electrochemical cell are improved through the prevention of dendrite growth. The pretreatment process includes the use of an alternating current to modify the surface properties of the metal electrode, such that a more uniform flux of metal ions is transferred across the electrode-electrolyte Interface in subsequent electrodeposition and electrodissolution processes. As a result, an electrode treated with such a process exhibits improved performance and durability, including markedly lower overpotentials and largely improved metal (e.g., lithium) retention in strip plate tests as compared with untreated electrodes.