公开(公告)号：US12255339B2

公开(公告)日：2025-03-18

申请号：US17605192

申请日：2020-04-21

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Xiangfeng Duan ,  Yu Huang ,  Chengzhang Wan ,  Mufan Li

IPC: H01M12/06 ,  C25B11/081 ,  C25B11/089 ,  H01M4/92 ,  H01M12/08

Abstract: Provided herein are catalyst materials comprising a catalyst support; and PtM′ nanowires affixed to the catalyst support, wherein the PtM′ nanowires include single atomic species of M′ at exterior surfaces of the PtM′ nanowires, and M′ represents at least one metal, e.g., a metal different from Pt. Also disclosed are manufacturing methods comprising: providing initial MM′ nanowires having an initial molar ratio of M:M′, wherein M is a noble metal, and M′ is a metal different from M; subjecting the initial MM′ nanowires to electrochemical dealloying to partially remove M′ and form partially dealloyed MM′ nanowires having a subsequent molar ratio of M:M′, wherein the subsequent molar ratio of M:M′ is greater than the initial molar ratio of M:M′; and affixing the partially dealloyed MM′ nanowires to a catalyst support.

公开(公告)号：US11421345B2

公开(公告)日：2022-08-23

申请号：US16329084

申请日：2017-08-29

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Xiangfeng Duan ,  Yu Huang ,  Mufan Li

IPC: C30B33/10 ,  C30B7/14 ,  C30B29/52 ,  C25B11/02 ,  C25F1/00 ,  H01M4/92 ,  B22F9/24 ,  C30B29/60 ,  C25F7/00 ,  B22F1/16 ,  B22F1/17 ,  B22F1/054 ,  B82Y30/00 ,  B82Y40/00

Abstract: A manufacturing method includes: (1) providing M-M′ nanowires, wherein M′ is at least one sacrificial metal different from M; and (2) subjecting the M-M′ nanowires to electrochemical de-alloying to form jagged M nanowires.

公开(公告)号：US20210351407A1

公开(公告)日：2021-11-11

申请号：US17187189

申请日：2021-02-26

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Xiangfeng Duan ,  Yuxi Xu

IPC: H01M4/587 ,  H01M4/133 ,  H01M4/1393 ,  H01M10/0525

Abstract: A lithium-ion battery includes: 1) an anode; 2) a cathode; and 3) an electrolyte disposed between the anode and the cathode and including lithium ions. The anode includes a graphene framework film including interconnected graphene sheets, and the graphene framework film has a specific surface area of 600 m2 g−1 or more.

公开(公告)号：US10971727B2

公开(公告)日：2021-04-06

申请号：US15556595

申请日：2016-03-09

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Xiangfeng Duan ,  Yuxi Xu

IPC: H01M4/133 ,  H01M4/587 ,  H01M4/1393 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/02 ,  H01M4/36

Abstract: A lithium-ion battery includes: 1) an anode; 2) a cathode; and 3) an electrolyte disposed between the anode and the cathode and including lithium ions. The anode includes a graphene framework film including interconnected graphene sheets, and the graphene framework film has a specific surface area of 600 m2 g−1 or more.

公开(公告)号：US10901243B2

公开(公告)日：2021-01-26

申请号：US16308383

申请日：2017-06-09

Applicant: The Regents of the University of California

Inventor： Chee Wei Wong ,  Baicheng Yao ,  Yuan Liu ,  Xiangfeng Duan

IPC: G02F1/025 ,  G02B6/122 ,  G02B6/42 ,  G02F1/01

Abstract: Methods and apparatus for providing all-optically generated, on-chip propagated and high-efficiency tunable plasmons are described. The plasmon generating apparatus includes a graphene based silicon nitride waveguide (GSiNW) utilizing ‘C+L’ band light sources and detectors that take advantage of the surface 2nd nonlinearity on graphene. The optical generation is accomplished via one or more optical communication lasers through the difference-frequency generation process. The THz frequency and intensity is tunable via an external gate voltage. Using such a device the optical to THz conversion may be made at least an order of magnitude more efficient than prior THz sources, and can be used to make chip-scale room-temperature THz sources, switches, modulators and detectors based on graphene.

公开(公告)号：US20170194144A1

公开(公告)日：2017-07-06

申请号：US15510618

申请日：2015-09-10

Applicant: Xiangfeng Duan ,  Yu Huang ,  THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Xiangfeng Duan ,  Yu Huang

IPC: H01L21/02 ,  B05D1/18 ,  B05D1/00 ,  H01L21/477 ,  H01L21/428

CPC classification number: H01L21/02628 ,  B05D1/005 ,  B05D1/18 ,  H01L21/02381 ,  H01L21/02488 ,  H01L21/02568 ,  H01L21/02601 ,  H01L21/428 ,  H01L21/477 ,  H01L29/78681 ,  H01L29/78684

Abstract: A method of forming a thin film includes: (1) providing an ink composition including nanoplates of a layered material disposed in a liquid dispersion medium; (2) applying the ink composition over a substrate to form a coating; and (3) annealing the coating to form a thin film of the nanoplates over the substrate.

公开(公告)号：US11575006B2

公开(公告)日：2023-02-07

申请号：US16982477

申请日：2019-03-19

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Xiangfeng Duan ,  Yu Huang ,  Yuan Liu

IPC: H01L29/06 ,  H01L29/66 ,  H01L29/786 ,  H01L51/05 ,  H01L31/0352 ,  H01L33/20

Abstract: An electronic or optoelectronic device includes: (1) a layer of a first material; and (2) a layer of a second material disposed on the layer of the first material, wherein the first material is different from the second material, and the layer of the first material is spaced from the layer of the second material by a gap.

公开(公告)号：US20190137795A1

公开(公告)日：2019-05-09

申请号：US16308383

申请日：2017-06-09

Applicant: The Regents of the University of California

Inventor： Chee Wei Wong ,  Baicheng Yao ,  Yuan Liu ,  Xiangfeng Duan

IPC: G02F1/025 ,  G02B6/122 ,  G02B6/42 ,  G02F1/01

Abstract: Methods and apparatus for providing all-optically generated, on-chip propagated and high-efficiency tunable plasmons are described. The plasmon generating apparatus includes a graphene based silicon nitride waveguide (GSiNW) utilizing ‘C+L’ band light sources and detectors that take advantage of the surface 2nd nonlinearity on graphene. The optical generation is accomplished via one or more optical communication lasers through the difference-frequency generation process. The THz frequency and intensity is tunable via an external gate voltage. Using such a device the optical to THz conversion may be made at least an order of magnitude more efficient than prior THz sources, and can be used to make chip-scale room-temperature THz sources, switches, modulators and detectors based on graphene.

公开(公告)号：US20160284481A1

公开(公告)日：2016-09-29

申请号：US15035108

申请日：2014-07-30

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Xiangfeng Duan ,  Yuxi Xu

IPC: H01G11/36 ,  H01G11/46 ,  H01G11/28 ,  H01G11/86 ,  H01G11/24 ,  H01G11/42

Abstract: An electrochemical capacitor includes a pair of electrodes and an electrolyte disposed between the pair of electrodes. At least a first electrode of the pair of electrodes includes a graphene framework film, and the graphene framework film includes interconnected graphene sheets with nanopores formed in the graphene sheets.

Abstract translation: 电化学电容器包括一对电极和设置在该对电极之间的电解质。 所述一对电极中的至少第一电极包括石墨烯框架膜，并且所述石墨烯框架膜包括在所述石墨烯片中形成有纳米孔的互连的石墨烯片。

公开(公告)号：US12283696B2

公开(公告)日：2025-04-22

申请号：US17239267

申请日：2021-04-23

Applicant: The Regents of the University of California

Inventor： Xiangfeng Duan ,  Yu Huang ,  Hongtao Sun

IPC: H01M4/80 ,  C01B32/194 ,  H01G11/26 ,  H01G11/36 ,  H01G11/46 ,  H01G11/70 ,  H01G11/86 ,  H01M4/04 ,  H01M4/13 ,  H01M4/131 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M4/485 ,  H01M4/505 ,  H01M4/58 ,  H01M4/62 ,  H01M4/66 ,  B82Y30/00 ,  B82Y40/00 ,  H01M4/02 ,  H01M4/525

Abstract: A method of forming an electrode material includes: (1) loading an electrochemically active material onto graphene sheets; (2) combining the electrochemically active material-loaded graphene sheets with holey graphene oxide sheets to form a mixture; and (3) treating the mixture under reducing conditions to form a composite including a graphene framework loaded with the electrochemically active material.