公开(公告)号：US20220190325A1

公开(公告)日：2022-06-16

申请号：US17543657

申请日：2021-12-06

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Chi Ho KWOK ,  Wing Yin YUNG ,  Wing Lung HON ,  Shengbo LU ,  Chenmin LIU

IPC: H01M4/36 ,  D01D5/00 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/505

Abstract: The preset invention provides an electrode structure for a lithium ion battery comprising an electrode selected from a cathode including a lithium-based material or an anode including a conductive material, and a melt-convertible encapsulation layer covering at least one surface layer of the electrode. The melt-convertible encapsulation layer comprises a network of nanofibers having the diameter ranging approximately from 100 to 300 nm and polymer microspheres embedded in and coated on the nanofibrous network, wherein the ratio of the diameter of the polymer microspheres to the diameter of the nanofiber is over 30. The polymer microspheres melt to form a dielectric coating of the electrode so as to prevent fire or thermal runaway at a temperature approximately from 100 to 200° C.

公开(公告)号：US20230303901A1

公开(公告)日：2023-09-28

申请号：US18187712

申请日：2023-03-22

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Chi Ming LEUNG ,  Sze Chun YIU ,  Chi Hin WONG ,  Chi Ho KWOK ,  Chenmin LIU

IPC: C09K5/04 ,  H05K7/20

CPC classification number: C09K5/048 ,  H05K7/203 ,  H05K7/20327

Abstract: An immersion cooling system includes a fluid-retaining container having space for accommodating an electronic device. A heat transfer fluid is in contact with the electronic device. A heat exchanger contacts and condenses vapor from vaporization of the heat transfer fluid. The heat transfer fluid has a thermal conductivity higher than 0.08 W m−1K−1, a dielectric constant (Dk) 20-40 GHz less than 3.0, and a heat of vaporization higher than 150 kJ kg−1, with fire retarding features, compatibility with plastics, metals, rubbers and includes a partially fluorinated compound. The improved immersion cooling system includes fluids with increased thermal conductivity and heat of vaporization while reducing fluid density and maintaining the advantages of the fluid being non-flammable, having high electrical stability and a low dielectric constant.

公开(公告)号：US20230265066A1

公开(公告)日：2023-08-24

申请号：US18180149

申请日：2023-03-08

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Chi Ming LEUNG ,  Chun Hei WONG ,  Chi Ho KWOK ,  Chenmin LIU

IPC: C07D311/92 ,  C09K9/02 ,  C07D311/94 ,  C07D491/052

CPC classification number: C07D311/92 ,  C09K9/02 ,  C07D311/94 ,  C07D491/052 ,  C09K2211/1018

Abstract: Provided herein are a series of water-soluble photochromic naphthopyran compounds, a mixture and a polymer thin film comprising the same, and applications thereof in photochromic materials, especially water-soluble photochromic material. The present photochromic naphthopyran compounds display excellent water solubility in neutral pH environment, rapid light response and fast thermal bleaching.

公开(公告)号：US20230159818A1

公开(公告)日：2023-05-25

申请号：US17992924

申请日：2022-11-22

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Nathan Man-Wai WU ,  Chi Ho KWOK ,  Chaau Yan POON ,  Chenmin LIU

IPC: C09K9/02 ,  C09D11/033 ,  C09D11/037

CPC classification number: C09K9/02 ,  C09D11/033 ,  C09D11/037

Abstract: A photochromic composition having at least one photochromic naphthopyran-based component with R′ and R″ groups selected from hydrogen, alkyl, fluorinated alkyl, alkenyl, alkynyl, alkylaryl, cycloalkyl, alkoxy, halogen, amine, carbonate ester, carboxylate, aryl, substituted aryl, heteroaryl, substituted heteroaryl or a heterocyclic group and Ar′ and Ar″ groups selected from unsubstituted or substituted cyclic five-membered or six-membered structures including benzene, pyridine, thiophene, furan, carbazole, triphenylamine, dibenzothiophene, dibenzofuran, fluorine, naphthalene, anthracene and pyrene. The photochromic composition is excitable under a visible light range to produce a color change. A second photochromic naphthopyran-based component with a different thermal decay rate constant (k) may further be included in the photochromic composition. The photochromic composition is incorporated into color-changing inks and polymers.

公开(公告)号：US20240130086A1

公开(公告)日：2024-04-18

申请号：US18393724

申请日：2023-12-22

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Wai Chung LI ,  Chi Ho KWOK

IPC: H05K7/20 ,  C09K5/04

CPC classification number: H05K7/20381 ,  C09K5/048 ,  H05K7/20236 ,  H05K7/20263 ,  H05K7/20272 ,  H05K7/20281 ,  H05K7/20318 ,  H05K7/20327

Abstract: A multimode immersion cooling system includes a first, single-phase immersion cooling mode and a second, two-phase immersion cooling mode. The system operates in a single phase mode and reserves a two-phase mode for peak energy consumption periods. A single thermal transfer fluid is used for both modes, remaining in a liquid phase in a first single-phase immersion cooling mode and vaporizing when the thermal transfer fluid temperature reaches its boiling point in a second two-phase immersion cooling mode. A heat exchanger extracts thermal energy from heated thermal transfer fluid in the single phase mode while a condenser cools vaporized thermal transfer fluid to condense the vapor during the second, two-phase immersion cooling mode. A controller determines whether the multimode immersion cooling system operates in the single-phase mode or the second two-phase mode, or both.

公开(公告)号：US20220206340A1

公开(公告)日：2022-06-30

申请号：US17137399

申请日：2020-12-30

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Sze Chun YIU ,  Wing Yin YUNG ,  Chi Hin WONG ,  Chi Ho KWOK ,  Chenmin LIU

IPC: G02F1/1335 ,  G02F1/1368 ,  C09K11/02 ,  C09K11/88 ,  C09K11/56

Abstract: A quantum dot-based color display includes a backlight unit with a light source and light source distribution layer and a photo down-conversion light emissive layer. The photo down-conversion layer has populations of light-emitting Group II-VI core-shell structure quantum dots, the core having an excess amount of a Group II component in a ratio to a Group VI component of approximately 6:1 or greater. The quantum dots include an organic fraction of approximately 20 weight percent to approximately 45 weight percent, the organic fraction including ligands bound to quantum dot surfaces in an as-deposited state and including one or more long-chain fatty acids. Non-barrier polymer films are positioned on either side of the photo down conversion light emissive layer which exhibits photo stability at a light intensity of at least 4000 W/m2. A display panel cooperates with the back light unit to form the display.

公开(公告)号：US20220166085A1

公开(公告)日：2022-05-26

申请号：US17521864

申请日：2021-11-09

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Zhengfu QIU ,  Wing Lung HON ,  Yuen Yung CHAN ,  Cheuk Yin LEE ,  Shengbo LU ,  Chi Ho KWOK ,  Chenmin LIU

IPC: H01M10/653 ,  H01M10/0525 ,  H01M10/654 ,  H01M4/04

Abstract: The present invention provides a thermally-decomposable consolidated polymer particle encapsulated-electrode for a lithium-ion battery. The electrode includes polymer particles including at least one connection unit and at least one crosslinker in an amount of approximately 40% to 98% by weight and at least one binder material in an amount of approximately from 2% to 60% by weight. The consolidated crosslinked polymer particle coating results in a porous structure encapsulating the electrode. The pressure resistance of the consolidated crosslinked polymer particle coating ranges approximately from 0.5 to 8 MPa and the consolidated crosslinked polymer particle coating is decomposed to release a non-flammable gas and phosphorous-containing molecules so as to prevent thermal runaway at a temperature approximately from 300° C. to 500° C.

公开(公告)号：US20200076009A1

公开(公告)日：2020-03-05

申请号：US16547582

申请日：2019-08-22

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Chi Ho KWOK ,  Ka I LEE ,  Chenmin LIU ,  Ivan Ka Yu LAU

IPC: H01M10/42 ,  H01M10/0525 ,  H01M2/16 ,  A62C3/16 ,  A62C35/10

Abstract: Lithium ion batteries with improved fire resistance properties are described. The lithium ion battery includes a first electrode including a lithium compound and a second electrode. A separator is positioned between the first electrode and the second electrode and an electrolyte is provided. wherein the separator comprises at least a layer of polymeric nanofibers positioned on one side of a separator core and a fire-retardant polymer coating formed opposite to the nanofiber layer which is simultaneously deposited during electrospinning process. The polymeric nanofibers have a diameter less than approximately 1 micron. The polymeric nanofibers have a fire-retardant material entrapped within the nanofibers. The fire-retardant material has a lower melting point than the polymeric nanofibers. The separator/nanofibers/fire-retardant material are configured such that a fire-initiating event releases the entrapped fire-retardant material from the nanofibers which extinguishes the fire-initiating event.

公开(公告)号：US20220165681A1

公开(公告)日：2022-05-26

申请号：US17530483

申请日：2021-11-19

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Chi Ho KWOK ,  Xiaohua CHEN ,  Wai Chung LI ,  Chenmin LIU

IPC: H01L23/552 ,  H01F1/34 ,  C01B32/21 ,  H01F1/00

Abstract: The present invention provides an EMI shielding device including a flame retarding, thermal interface material composite with a through plane thermal conductivity of no less than 30 W/mK and a dielectric withstanding voltage of no less than 1 kV/mm, where the composite includes at least one dielectric layer of self-aligned, carbon-based materials associated with superparamagnetic particles and at least one layer of fillers including a blend of dielectric heat transfer materials with a thermal or UV curable polymer or phase change polymer. The anisotropic heat transfer carbon-based materials associated with superparamagnetic materials are aligned under a low magnetic field strength of less than 1 Tesla to an orientation that results in a high thermal conductivity direction which can conduct the maximum heat from the adjacent device of the present composite. The present invention also provides a method for preparing the composite.

公开(公告)号：US20180294509A1

公开(公告)日：2018-10-11

申请号：US15924299

申请日：2018-03-19

Applicant: Nano and Advanced Materials Institute Limited

Inventor： Chenmin LIU ,  Chi Ho KWOK ,  Shengbo LU

IPC: H01M10/052 ,  H01M10/04 ,  H01M10/0565

Abstract: A flexible and foldable lithium ion battery is disclosed having an operational bend radius of 180 degrees with no interruption in supply of electrical power. The lithium ion battery includes a high-elasticity separator sponge having a porosity of approximately 70% to approximately 90%. The separator is a polymer-based fiber mat having fibers with a submicron diameter. The separator sponge has a thickness in a range of approximately 5 to 50 microns, an air permeability of approximately 100 to approximately 300 s/100 ml, and a puncture resistance of approximately 350 to approximately 950 N. First and second electrodes are disposed on either side of the separator sponge and include active materials positioned on thin metal current collectors. A liquid electrolyte is absorbed by the separator sponge. The battery may be folded upon itself without loss of power.