公开(公告)号：US11217792B2

公开(公告)日：2022-01-04

申请号：US15412852

申请日：2017-01-23

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Bor Z Jang

IPC: H01M4/62 ,  H01M4/136 ,  H01M4/04 ,  H01M4/1397 ,  H01M4/36 ,  H01M4/58 ,  H01M4/02

Abstract: A graphene-enhanced transition metal fluoride or chloride hybrid particulate for use as a lithium battery cathode active material, wherein the particulate is formed of a single or a plurality of graphene sheets and a plurality of fine transition metal fluoride or chloride particles with a size smaller than 10 μm (preferably sub-micron or nano-scaled), and the graphene sheets and the particles are mutually bonded or agglomerated into an individual discrete particulate with at least a graphene sheet embracing the transition metal fluoride or chloride particles, and wherein the particulate has an electrical conductivity no less than 10−4 S/cm and the graphene is in an amount of from 0.01% to 30% by weight based on the total weight of graphene and the transition metal fluoride or chloride combined.

公开(公告)号：US11120952B2

公开(公告)日：2021-09-14

申请号：US15650109

申请日：2017-07-14

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Bor Z. Jang

IPC: H01G11/70 ,  H01G11/32 ,  H01G11/28 ,  H01G11/86 ,  H01G11/24 ,  H01G11/02 ,  H01G11/36 ,  H01G11/46

Abstract: A process for producing a supercapacitor cell, comprising (a) Assembling a porous cell framework composed of a first conductive foam structure, a second conductive foam structure, and a porous separator, wherein the first and/or second conductive foam structure has a thickness no less than 200 μm and at least 80% by volume of pores; (b) Preparing a first suspension of an anode active material dispersed in a liquid electrolyte and a second suspension of a cathode active material (e.g. graphene sheets) dispersed in a liquid electrolyte; and (c) Injecting the first suspension into pores of the first conductive foam structure to form an anode and injecting second suspension into pores of the second conductive foam structure to form a cathode, wherein the anode active material or the cathode active material constitutes an electrode active material loading >10 mg/cm2, preferably >15 mg/cm2, more preferably >20 mg/cm2.

公开(公告)号：US11027252B2

公开(公告)日：2021-06-08

申请号：US16654654

申请日：2019-10-16

Applicant: Nanotek Instruments, Inc.

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

IPC: B01J8/00 ,  B01J8/08 ,  B01J8/10 ,  C01B32/192 ,  C01B32/198 ,  C01B32/22

Abstract: Provided is a continuous reactor system for producing graphene or an inorganic 2-D compound, the reactor comprising: (a) a first body comprising an outer wall and a second body comprising an inner wall, wherein the inner wall defines a bore and the first body is configured within the bore and a motor is configured to rotate the first and/or second body; (b) a reaction chamber between the outer wall of the first body and the inner wall of the second body; (c) a first inlet and a second inlet disposed at first end of the reactor and in fluid communication with the reaction chamber; (d) a first outlet and a second outlet disposed downstream from the first inlet, the outlets being in fluid communication with the reaction chamber; and (e) a flow return conduit having two inlets/outlets in fluid communication with two ends of the reactor.

公开(公告)号：US11024849B2

公开(公告)日：2021-06-01

申请号：US16006131

申请日：2018-06-12

Applicant: Nanotek Instruments, Inc.

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

IPC: H01M4/60 ,  H01M10/052 ,  H01M10/0569 ,  H01M10/0568 ,  H01M4/134 ,  H01M4/36 ,  H01M4/80 ,  H01M4/66 ,  H01M4/38 ,  H01M4/62 ,  H01M50/411 ,  H01M4/02

Abstract: Provided is a lithium secondary battery containing an anode, a cathode, a porous separator disposed between the anode and the cathode, an electrolyte, and a lithium ion reservoir disposed between the anode and the porous separator and configured to receive lithium ions from the cathode when the battery is charged and enable the lithium ions to enter the anode in a time-delayed manner, wherein the reservoir comprises a conducting porous framework structure having pores (pore size from 1 nm to 500 μm) and lithium-capturing groups residing in the pores, wherein the lithium-capturing groups are selected from (a) redox forming species that reversibly form a redox pair with a lithium ion; (b) electron-donating groups interspaced between non-electron-donating groups; (c) anions and cations wherein the anions are more mobile than the cations; or (d) chemical reducing groups that partially reduce lithium ions from Li+1 to Li+δ, wherein 0

公开(公告)号：US10964936B2

公开(公告)日：2021-03-30

申请号：US15910465

申请日：2018-03-02

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Bor Z. Jang

IPC: H01M4/36 ,  H01M4/13 ,  H01M4/38 ,  H01M4/48 ,  H01M4/52 ,  H01M4/58 ,  H01M4/60 ,  H01M4/62 ,  H01M10/05 ,  H01M4/133 ,  H01M4/134 ,  H01M4/137 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0525 ,  H01M4/583 ,  H01M4/02

Abstract: Provided is an anode active material electrode for a lithium battery. This electrode layer comprises multiple particulates of an anode active material, wherein at least a particulate is composed of one or a plurality of particles of an anode active material being encapsulated by a thin layer of sulfonated elastomer/graphene composite having from 0.01% to 50% by weight of graphene sheets dispersed in a sulfonated elastomeric matrix material, wherein the encapsulating shell composite has a thickness from 1 nm to 10 μm, a lithium ion conductivity from 10−7 S/cm to 5×10−2 S/cm, and an electrical conductivity from 10−7 S/cm to 100 S/cm when measured at room temperature. The anode active material is preferably selected from Si, Ge, Sn, SnO2, SiOx, Co3O4, Mn3O4, etc., which has a specific capacity of lithium storage greater than 372 mAh/g (the theoretical lithium storage limit of graphite).

公开(公告)号：US20210091368A1

公开(公告)日：2021-03-25

申请号：US16580334

申请日：2019-09-24

Applicant: Nanotek Instruments, Inc.

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

IPC: H01M4/04 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/139 ,  H01G11/86 ,  H01G11/32 ,  H01G11/26

Abstract: Provided is a process for producing a bi-polar electrode for a battery or capacitor, the process comprising: (a) providing a conductive material foil having a thickness from 10 nm to 100 μm and two opposing parallel primary surfaces, and coating one or both of the primary surfaces with a layer of graphene material having a thickness from 5 nm to 50 μm to form a graphene-coated current collector; and (b) depositing a negative electrode layer and a positive electrode layer respectively onto two opposing primary surfaces of the graphene-coated current collector, wherein the negative electrode layer is in physical contact with the layer of graphene material or in direct contact with a primary surface of the conductive material foil and the positive electrode layer is in physical contact with the layer of graphene material or directly with the opposing primary surface of the conductive material foil.

公开(公告)号：US10916766B2

公开(公告)日：2021-02-09

申请号：US15483347

申请日：2017-04-10

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Bor Z. Jang

IPC: H01M4/36 ,  H01M10/0525 ,  H01M10/054 ,  H01M4/62 ,  H01M4/02

Abstract: Provided is a rechargeable alkali metal-sulfur cell comprising an anode active material layer, an electrolyte, and a cathode active material layer containing multiple particulates of a sulfur-containing material selected from a sulfur-carbon hybrid, sulfur-graphite hybrid, sulfur-graphene hybrid, conducting polymer-sulfur hybrid, metal sulfide, sulfur compound, or a combination thereof and wherein at least one of the particulates is composed of one or a plurality of sulfur-containing material particles being embraced or encapsulated by a thin layer of a high-elasticity ultra-high molecular weight polymer having a recoverable tensile strain no less than 2%, a lithium ion conductivity no less than 10−6 S/cm at room temperature, and a thickness from 0.5 nm to 10 μm This battery exhibits an excellent combination of high sulfur content, high sulfur utilization efficiency, high energy density, and long cycle life.

公开(公告)号：US10903020B2

公开(公告)日：2021-01-26

申请号：US15591483

申请日：2017-05-10

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Chueh Liu ,  Song-Hai Chai ,  Bor Z. Jang

IPC: H01G11/06 ,  H01G11/10 ,  H01G11/24 ,  H01G11/26 ,  H01G11/28 ,  H01G11/32 ,  H01G11/48 ,  H01G11/52 ,  H01G11/84 ,  H01G11/36 ,  H01G11/38 ,  H01G11/82

Abstract: Provided is rolled supercapacitor comprising an anode, a cathode, a porous separator, and an electrolyte, wherein the anode contains a wound anode roll of an anode active material having an anode roll length, an anode roll width, and an anode roll thickness, wherein the anode active material contains isolated graphene sheets that are oriented substantially parallel to the plane defined by the anode roll length and the anode roll width; and/or the cathode contains a wound cathode roll of a cathode active material having a cathode roll length, a cathode roll width, and a cathode roll thickness, wherein the cathode active material contains isolated graphene sheets that are oriented substantially parallel to the plane defined by the cathode roll length and the cathode roll width; and wherein the anode roll width and/or the cathode roll width is substantially perpendicular to the separator.

公开(公告)号：US10826113B2

公开(公告)日：2020-11-03

申请号：US14545240

申请日：2015-04-13

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Bor Z. Jang

IPC: H01M10/054 ,  H01M4/583 ,  H01M4/50 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/38 ,  H01G11/62 ,  H01G11/36 ,  H01G11/24 ,  H01G11/02 ,  H01G11/30 ,  H01M4/505 ,  H01M4/42 ,  H01G11/60 ,  H01G11/04

Abstract: A zinc ion-exchanging battery device comprising: (A) a cathode comprising two cathode active materials (a zinc ion intercalation compound and a surface-mediating material); (B) an anode containing zinc metal or zinc alloy; (C) a porous separator disposed between the cathode and the anode; and (D) an electrolyte containing zinc ions that are exchanged between the cathode and the anode during battery charge/discharge. The zinc ion intercalation compound is selected from chemically treated carbon or graphite material having an expanded inter-graphene spacing d002 of at least 0.5 nm, or an oxide, carbide, dichalcogenide, trichalcogenide, sulfide, selenide, or telluride of niobium, zirconium, molybdenum, hafnium, tantalum, tungsten, titanium, vanadium, chromium, cobalt, manganese, iron, nickel, or a combination thereof. The surface-mediating material contains exfoliated graphite or multiple single-layer sheets or multi-layer platelets of a graphene material.

公开(公告)号：US10804537B2

公开(公告)日：2020-10-13

申请号：US15676677

申请日：2017-08-14

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Bor Z. Jang

IPC: H01M4/62 ,  H01M4/1395 ,  H01M4/134 ,  H01M4/131 ,  B01J2/00 ,  H01M10/42 ,  H01M10/058 ,  H01M4/36 ,  H01M4/38 ,  H01M4/52 ,  H01M4/1391 ,  H01M4/48 ,  H01M10/0525 ,  H01M10/052

Abstract: Provided is an anode active material layer for a lithium battery, comprising multiple particulates of an anode active material, wherein a particulate is composed of one or a plurality of particles of a high-capacity anode active material being embraced or encapsulated by a thin layer of a high-elasticity polymer having a recoverable tensile strain no less than 5% when measured without an additive or reinforcement, a lithium ion conductivity no less than 10−6 S/cm at room temperature, and a thickness from 0.5 nm (or a molecular monolayer) to 10 μm (preferably less than 100 nm), and wherein the high-elasticity polymer contains a polyrotaxane network having a rotaxane structure or a polyrotaxane structure at a crosslink point of the polyrotaxane network.