公开(公告)号：US20190326587A1

公开(公告)日：2019-10-24

申请号：US15956312

申请日：2018-04-18

Applicant: Nanotek Instruments, Inc.

Inventor： Hui He ,  Aruna Zhamu ,  Bor Z. Jang

IPC: H01M4/134 ,  H01M10/28 ,  H01M4/131 ,  H01M4/136

Abstract: Provided is a pre-selenized cathode for an alkali metal-selenium cell, comprising (A) an integral layer of a mesoporous structure of a carbon, graphite, metal, or conductive polymer, wherein the mesoporous structure has mesoscaled pores with a pore size of 0.5-50 nm and a specific surface area from 100 to 3,200 m2/g and (b) nanoparticles or nanocoating of selenium or metal selenide having a diameter or thickness from 0.5 nm to 20 nm, wherein selenium or metal selenide resides in the mesoscaled pores and occupies an amount from 50% to 99% by weight based on the total weight of selenium or metal selenide and the integral layer of mesoporous structure combined.

公开(公告)号：US20190319298A1

公开(公告)日：2019-10-17

申请号：US15954046

申请日：2018-04-16

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Bor Z. Jang

IPC: H01M10/0525 ,  H01M10/054 ,  H01M4/38 ,  H01M4/587 ,  H01M4/36 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0565 ,  H01M10/0569 ,  H01M10/0568

Abstract: Provided is a rechargeable alkali metal-selenium cell comprising an anode active material layer, an electrolyte, and a cathode active material layer containing multiple particulates of a selenium-containing material selected from a selenium-carbon hybrid, selenium-graphite hybrid, selenium-graphene hybrid, conducting polymer-selenium hybrid, a metal selenide, a Se alloy or mixture with Sn, Sb, Bi, S, or Te, a selenium compound, or a combination thereof and wherein at least one of the particulates comprises one or a plurality of selenium-containing material particles being embraced or encapsulated by a thin layer of an elastomer having a recoverable tensile strain no less than 5% when measured without an additive or reinforcement, a lithium ion conductivity no less than 10−7 S/cm at room temperature, and a thickness from 0.5 nm to 10 μm This battery exhibits an excellent combination of high selenium content, high selenium utilization efficiency, high energy density, and long cycle life.

公开(公告)号：US20190319297A1

公开(公告)日：2019-10-17

申请号：US15952544

申请日：2018-04-13

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Bor Z. Jang

IPC: H01M10/058 ,  H01M10/0525 ,  H01M10/054 ,  H01M4/38 ,  H01M4/587 ,  H01M4/36 ,  H01M4/62 ,  H01M4/58

Abstract: Provided is a method of manufacturing a rechargeable alkali metal-selenium cell, comprising: (a) providing a cathode and an optional cathode current collector to support the cathode; (b) providing an alkali metal anode and an optional anode current collector to support said anode; and (c) providing an electrolyte in contact with the anode and the cathode and an optional separator electrically separating the anode and the cathode; wherein the cathode contains multiple particulates of a selenium-containing material wherein at least one of the particulates comprises one or a plurality of selenium-containing material particles being embraced or encapsulated by a thin layer of a high-elasticity polymer having a recoverable tensile strain from 5% to 1,000% when measured without an additive or reinforcement, a lithium ion conductivity no less than 10−7 S/cm at room temperature, and a thickness from 0.5 nm to 10 μm.

公开(公告)号：US20190301814A1

公开(公告)日：2019-10-03

申请号：US15944162

申请日：2018-04-03

Applicant: Nanotek Instruments, Inc.

Inventor： Yi-jun Lin ,  Aruna Zhamu ,  Bor Z. Jang

IPC: F28D20/02 ,  C09K5/14 ,  H01M4/80 ,  H01M4/66 ,  H01M8/0243 ,  H01M8/0234 ,  H01M8/0232 ,  C01B32/192 ,  C01B32/19 ,  C01B32/194

Abstract: A metal-bonded graphene foam product, comprising: (A) a sheet or roll of solid graphene foam, having a sheet plane and a sheet thickness direction, composed of multiple pores (cells) and pore walls, wherein said pore walls contain a pristine graphene material having less than 0.01% by weight of non-carbon elements or a non-pristine graphene material having 0.01% to 20% by weight of non-carbon elements, wherein said non-pristine graphene is selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, boron-doped graphene, nitrogen-doped graphene, chemically functionalized graphene, or a combination thereof; and (B) a metal that fills in the is bonded to graphene sheets, wherein the metal-bonded graphene foam product has a thickness-direction thermal conductivity from 10 W/mK to 800 W/mK or a thickness-direction electrical conductivity from 40 S/cm to 3,200 S/cm.

公开(公告)号：US20190292675A1

公开(公告)日：2019-09-26

申请号：US15926458

申请日：2018-03-20

Applicant: Nanotek Instruments, Inc.

Inventor： Yi-jun Lin ,  Shaio-yen Lee ,  Yao-de Jhong ,  Aruna Zhamu ,  Bor Z. Jang

IPC: C25D5/54 ,  B32B27/12 ,  B32B9/00 ,  B32B15/08 ,  B32B15/14 ,  C08J7/04 ,  C08K3/04 ,  C08K3/08

Abstract: Provided is a process for producing a surface-metalized polymer film, comprising: (a) feeding a continuous polymer film from a feeder into a graphene deposition chamber which accommodates a graphene dispersion comprising multiple graphene sheets and an optional conducive filler dispersed in a first liquid medium and an optional adhesive resin dissolved in this first liquid medium; (b) operating the graphene deposition chamber to deposit the graphene sheets and optional conductive filler to at least a primary surface of the polymer film for forming a graphene-coated polymer film; (c) moving the graphene-coated film into a metallization chamber which accommodates a plating solution for plating a layer of a desired metal onto the graphene-coated polymer film to obtain a surface-metalized polymer film; and (d) operating a winding roller to collect the surface-metalized polymer film. This film exhibits a high scratch resistance, strength, hardness, electrical conductivity, thermal conductivity, light reflectivity, gloss, etc.

公开(公告)号：US20190292671A1

公开(公告)日：2019-09-26

申请号：US15935624

申请日：2018-03-26

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Yi-jun Lin ,  Bor Z. Jang

IPC: C25D1/00 ,  C22C26/00 ,  C22C19/03 ,  C22C9/00 ,  C23C18/16 ,  C23C18/32 ,  C25D3/12 ,  B82B3/00 ,  H05K7/20 ,  F28F21/02 ,  F28F21/08

Abstract: Provided is a metal matrix nanocomposite comprising: (a) a metal or metal alloy as a matrix material; and (b) multiple graphene sheets that are dispersed in said matrix material, wherein said multiple graphene sheets are substantially aligned to be parallel to one another and are in an amount from 0.1% to 95% by volume based on the total nanocomposite volume; wherein the multiple graphene sheets contain single-layer or few-layer graphene sheets selected from pristine graphene, graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, doped graphene, chemically functionalized graphene, or a combination thereof and wherein the chemically functionalized graphene is not graphene oxide. The metal matrix exhibits a combination of exceptional tensile strength, modulus, thermal conductivity, and/or electrical conductivity.

公开(公告)号：US10424810B2

公开(公告)日：2019-09-24

申请号：US15783634

申请日：2017-10-13

Applicant: Nanotek Instruments, Inc.

Inventor： Baofei Pan ,  Aruna Zhamu ,  Bor Z. Jang

IPC: H01M10/04 ,  H01M4/36 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/02

Abstract: Provided is a surface-stabilized anode active material particulate (for use in a lithium battery), comprising: (a) one or a plurality of prelithiated or un-prelithiated anode active material particles (with or without a coating of carbon, graphene, or ion-conducting polymer); (b) a protecting polymer layer that wraps around, embraces or encapsulates the one or plurality of anode active material particles, wherein the protecting polymer layer has a thickness from 0.5 nm to 5 μm, and a lithium ion conductivity from 10−8 S/cm to 5×10−2 S/cm at room temperature and the protecting polymer layer contains a polymer selected from poly(ethylene oxide) (PEO), polypropylene oxide (PPO), poly(acrylonitrile) (PAN), poly(methyl methacrylate) (PMMA), poly(vinylidene fluoride) (PVdF), poly bis-methoxy ethoxyethoxide-phosphazene, polyvinyl chloride, poly(vinylidene chloride), polydimethylsiloxane, poly(vinylidene fluoride)-hexafluoropropylene (PVDF-HFP), polyethylene glycol (PEG), a PEG derivative, polyethylene glycol methyl ether, polyethylene glycol dimethyl ether, a sulfonated polymer, or a combination thereof.

公开(公告)号：US20190283377A1

公开(公告)日：2019-09-19

申请号：US15924957

申请日：2018-03-19

Applicant: Nanotek Instruments, Inc.

Inventor： Yi-jun Lin ,  Shaio-yen Lee ,  Yao-de Jhong ,  Aruna Zhamu ,  Bor Z. Jang

IPC: B32B27/12 ,  B32B9/00 ,  B32B15/08 ,  B32B15/14 ,  C08J7/04 ,  C08K3/04 ,  C08K3/08

Abstract: Provided is a surface-metalized polymer article comprising a polymer component having a surface, a first layer of combined multiple graphene sheets and a conductive filler (e.g. metal nanowires or carbon nanofibers) coated on the polymer component surface, and a second layer of a plated metal deposited on the first layer, wherein the multiple graphene sheets contain single-layer or few-layer graphene, and wherein the multiple graphene sheets and conductive filler are bonded to the polymer component surface with or without an adhesive resin.

公开(公告)号：US20190165365A1

公开(公告)日：2019-05-30

申请号：US15827754

申请日：2017-11-30

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Hui He ,  Baofei Pan ,  Bor Z. Jang

IPC: H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M10/0525

Abstract: Provided is an anode particulate, having a dimension from 10 nm to 100 μm, for use in an alkali metal battery, the particulate comprising (i) an anode active material capable of reversibly absorbing and desorbing lithium ions or sodium ions, (ii) an electron-conducting material, and (iii) a lithium ion-conducting or sodium ion-conducting electrolyte, wherein the electron-conducting material forms a three dimensional network of electron-conducting pathways in electronic contact with the anode active material and the electrolyte forms a three dimensional network of lithium ion- or sodium ion-conducting channels in ionic contact with the anode active material. The particulate can be of any shape, but preferably spherical or ellipsoidal in shape. Also provided is a cathode in a particulate form containing a cathode active material, an electron-conducting material forming a three dimensional network of electron-conducting pathways, and a lithium ion-conducting or sodium ion-conducting electrolyte forming a three dimensional network of ion-conducting channels.

公开(公告)号：US20190165363A1

公开(公告)日：2019-05-30

申请号：US15822871

申请日：2017-11-27

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Bor Z. Jang

IPC: H01M4/133 ,  H01M4/131 ,  H01M10/0525 ,  C01G33/00 ,  C01B32/182

Abstract: A lithium-ion battery anode layer, comprising an anode active material embedded in pores of a solid graphene foam composed of multiple pores and pore walls, wherein (a) the pore walls contain a pristine graphene or a non-pristine graphene material; (b) the anode active material contains particles of a niobium-containing composite metal oxide and is in an amount from 0.5% to 99% by weight based on the total weight of the graphene foam and the anode active material combined, and (c) the multiple pores are lodged with particles of the anode active material. Preferably, the solid graphene foam has a density from 0.01 to 1.7 g/cm3, a specific surface area from 50 to 2,000 m2/g, a thermal conductivity of at least 100 W/mK per unit of specific gravity, and/or an electrical conductivity no less than 1,000 S/cm per unit of specific gravity.