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    Production of graphitic films directly from highly aromatic molecules
    2.
    发明授权
    Production of graphitic films directly from highly aromatic molecules 有权

    公开(公告)号：US11267711B2

    公开(公告)日：2022-03-08

    申请号：US16361748

    申请日：2019-03-22

    Applicant: Nanotek Instruments, Inc.

    Inventor： Aruna Zhamu ,  Bor Z. Jang

    IPC: C01B32/205 ,  C04B35/524 ,  C01B32/184

    Abstract: Provided is a method of producing a graphitic film, comprising: (a) providing a suspension of aromatic molecules selected from petroleum heavy oil or pitch, coal tar pitch, a polynuclear hydrocarbon, a halogenated variant thereof, or a combination thereof, dispersed or dissolved in a liquid medium; (b) dispensing and depositing the suspension onto a surface of a supporting substrate to form a wet layer of aromatic molecules, wherein the procedure includes subjecting the suspension to an orientation-inducing stress or strain; (c) partially or completely removing the liquid medium; and (d) heat treating the resulting dried layer at a first temperature selected from 25° C. to 3,200° C. so that the aromatic molecules are merged or fused into larger aromatic molecules to form the graphitic film having graphene domains or graphite crystals, wherein the larger aromatic molecules or graphene planes in the graphene domains or graphite crystals are substantially parallel to each other.

    Partially and fully surface-enabled metal ion-exchanging energy storage devices
    4.
    发明授权
    Partially and fully surface-enabled metal ion-exchanging energy storage devices 有权

    公开(公告)号：US11038205B2

    公开(公告)日：2021-06-15

    申请号：US15648016

    申请日：2017-07-12

    Applicant: Nanotek Instruments, Inc.

    Inventor： Aruna Zhamu ,  Bor Z. Jang

    IPC: H01M4/62 ,  H01M4/13 ,  H01M10/0569 ,  H01M4/36 ,  H01M10/054 ,  H01M10/0568 ,  H01M4/60 ,  H01M10/0565 ,  H01M4/02

    Abstract: A surface-enabled, metal ion-exchanging battery device comprising a cathode, an anode, a porous separator, and a metal ion-containing electrolyte, wherein the metal ion is selected from aluminum (Al), gallium (Ga), indium (In), tin (Sn), lead (Pb), or bismuth (Bi), and at least one of the electrodes contains therein a metal ion source prior to the first charge or discharge cycle of the device and at least the cathode comprises a functional material or nano-structured material having a metal ion-capturing functional group or metal ion-storing surface in direct contact with the electrolyte. This energy storage device has a power density significantly higher than that of a lithium-ion battery and an energy density dramatically higher than that of a supercapacitor.

    PRODUCTION PROCESS FOR GRAPHENE-ENABLED BI-POLAR ELECTRODE AND BATTERY CONTAINING SAME
    7.
    发明申请
    PRODUCTION PROCESS FOR GRAPHENE-ENABLED BI-POLAR ELECTRODE AND BATTERY CONTAINING SAME 有权

    公开(公告)号：US20210111391A1

    公开(公告)日：2021-04-15

    申请号：US16598584

    申请日：2019-10-10

    Applicant: Nanotek Instruments, Inc.

    Inventor： Evan House ,  Aruna Zhamu ,  Bor Z. Jang

    IPC: H01M4/133 ,  H01M4/583 ,  H01G11/28 ,  H01G11/32 ,  H01G11/48 ,  H01G11/06 ,  H01G11/86

    Abstract: Provided is a bi-polar electrode for a battery, the electrode comprising: (a) a current collector comprising a conductive material foil (e.g. metal foil) having a thickness from 10 nm to 100 μm and two opposed, parallel primary surfaces, wherein one or both of the primary surfaces is coated with a layer of exfoliated graphite or expanded graphite material having a thickness from 10 nm to 50 μm; and (b) a negative electrode layer and a positive electrode layer respectively disposed on the two sides of the current collector, each in physical contact with the layer of exfoliated graphite or expanded graphite material or directly with a primary surface of the conductive material foil (if not coated with a exfoliated or expanded graphite layer). Also provided is a battery comprising multiple (e.g. 2-300) bipolar electrodes internally connected in series. There can be multiple bi-polar electrodes that are connected in parallel.

    Continuous production of 2D inorganic compound platelets
    9.
    发明授权
    Continuous production of 2D inorganic compound platelets 有权

    公开(公告)号：US10953380B1

    公开(公告)日：2021-03-23

    申请号：US16658669

    申请日：2019-10-21

    Applicant: Nanotek Instruments, Inc.

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

    IPC: B01J19/18 ,  C01B32/23 ,  C01B32/225

    Abstract: Provided is a process for manufacturing 2D inorganic compound platelets, the process comprising (a) preparing a first stock containing a 3D layered inorganic compound material dispersed in a liquid medium, (h) injecting the first stock into a continuous reactor having a vortex flow, (c) operating the continuous reactor to form a reaction product suspension containing 2D inorganic compound platelets dispersed in the liquid medium, and (d) separating and recovering said 2D inorganic compound platelets from said product suspension. The product suspension may be directed to flow back to the continuous director for further processing for at least another pass through the reactor, prior to step (d). The continuous reactor is preferably a Couette-Taylor reactor.

    Continuous graphitic fibers from living graphene molecules
    10.
    发明授权
    Continuous graphitic fibers from living graphene molecules 有权

    公开(公告)号：US10822725B2

    公开(公告)日：2020-11-03

    申请号：US13986223

    申请日：2013-04-15

    Applicant: Nanotek Instruments, Inc.

    Inventor： Aruna Zhamu ,  Bor Z Jang

    IPC: D01F9/12 ,  D01D5/14 ,  D01D10/02 ,  C01B32/194 ,  D01D1/02 ,  D01D5/04

    Abstract: A unitary graphene-based continuous graphitic fiber comprising at least 90% by weight of graphene planes that are chemically bonded with one another having an inter-planar spacing from 0.3354 to 0.4 nm and an oxygen content of 0.01 to 5% by weight, wherein the graphene planes are parallel to one another and parallel to a fiber axis direction and the graphitic fiber contains no core-shell structure, have no helically arranged graphene domains, and have a porosity level less than 5% by volume. This fiber can be produced by a continuous filament of graphene oxide gel having living graphene oxide molecules or functionalized graphene chains dissolved in a fluid medium. The filament is deposited onto a supporting substrate under a molecule-aligning stress condition along the filament axis direction and then subjected to drying and heating treatments.

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