公开(公告)号：US12243974B2

公开(公告)日：2025-03-04

申请号：US16241186

申请日：2019-01-07

Applicant: Nanotek Instruments, Inc.

Inventor： Bor Z. Jang

IPC: H01M10/04 ,  H01M4/24 ,  H01M4/36 ,  H01M4/38 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/42 ,  H01M50/414 ,  H01M50/434 ,  H01M50/437 ,  H01M50/489 ,  H01M50/494 ,  H01M50/497

Abstract: Provided is a method of improving a cycle-life of a rechargeable alkali metal-sulfur cell, the method comprising implementing an electronically non-conducting anode-protecting layer between an anode active material layer and a cathode active material without using a porous separator in the cell, wherein the anode-protecting layer has a thickness from 1 nm to 100 μm and comprises an elastomer having a fully recoverable tensile elastic strain from 2% to 1,000%, a lithium ion or sodium ion conductivity from 10−8 S/cm to 5×10−2 S/cm, and an electronic conductivity less than 10−4 S/cm when measured at room temperature. This battery exhibits an excellent combination of high sulfur content, high sulfur utilization efficiency, high energy density, no known dendrite issue, no dead lithium or dead sodium issue, and a long cycle life.

公开(公告)号：US11946704B2

公开(公告)日：2024-04-02

申请号：US16559000

申请日：2019-09-03

Applicant: Nanotek Instruments, Inc.

Inventor： Yi-jun Lin ,  Bor Z. Jang

IPC: B32B9/00 ,  F28F21/02 ,  B82Y30/00

CPC classification number: F28F21/02 ,  B82Y30/00 ,  Y10T428/30

Abstract: Provided is a elastic heat spreader film comprising: (a) an elastomer or rubber as a binder material or a matrix material; and (b) multiple graphene sheets that are bonded by the binder material or dispersed in the matrix material, wherein the multiple graphene sheets are substantially aligned to be parallel to one another and wherein the elastomer or rubber is in an amount from 0.001% to 20% by weight based on the total heat spreader film weight; 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 elastic heat spreader film has a fully recoverable tensile elastic strain from 2% to 100% and an in-plane thermal conductivity from 200 W/mK to 1,750 W/mK.

公开(公告)号：US11870051B2

公开(公告)日：2024-01-09

申请号：US16038814

申请日：2018-07-18

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Bor Z. Jang

IPC: H01M4/04 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/02

CPC classification number: H01M4/0404 ,  H01M4/0428 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M10/0525 ,  H01M2004/027

Abstract: Provided is a method of improving fast-chargeability of a lithium secondary battery containing an anode, a cathode, a porous separator disposed between the anode and the cathode, and an electrolyte, wherein the method comprises packing particles of an anode active material to form an anode active material layer having interstitial spaces and disposing a lithium ion reservoir in the interstitial spaces, configured to receive lithium ions from the cathode through the porous separator when the battery is charged and to enable the lithium ions to enter the particles of anode active material in a time-delayed manner.

公开(公告)号：US11658290B2

公开(公告)日：2023-05-23

申请号：US16404109

申请日：2019-05-06

Applicant: Nanotek Instruments, Inc.

Inventor： Bor Z. Jang

IPC: H01M10/052 ,  H01M4/36 ,  H01M4/38 ,  H01M10/0585 ,  H01M4/62 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/382 ,  H01M4/628 ,  H01M10/052 ,  H01M10/0585 ,  H01M2004/021 ,  H01M2004/027

Abstract: Provided is a lithium metal secondary battery comprising a cathode, an anode, an electrolyte-separator assembly disposed between the cathode and the anode, wherein the anode comprises: (a) an anode active material layer containing a layer of lithium or lithium alloy optionally supported by an anode current collector; and (b) an anode-protecting layer in physical contact with the anode active material layer and in ionic contact with the electrolyte-separator assembly, having a thickness from 10 nm to 500 μm and comprising an electrically and ionically conducting network of cross-linked conjugated polymer chains having a lithium ion conductivity from 10−8 to 5×10−2 S/cm and an electron conductivity from 10−8 to 103 S/cm.

公开(公告)号：US11276852B2

公开(公告)日：2022-03-15

申请号：US16166536

申请日：2018-10-22

Applicant: Nanotek Instruments, Inc.

Inventor： Bor Z. Jang

IPC: H01M4/36 ,  H01M10/052 ,  H01M4/38

Abstract: Provided is a lithium metal secondary battery comprising a cathode, an anode, and a non-solid state electrolyte without a porous separator disposed between the cathode and the anode, wherein the anode comprises: (a) an anode active material layer containing a layer of lithium or lithium alloy, in a form of a foil, coating, or multiple particles aggregated together, as an anode active material; and (b) an anode-protecting layer in physical contact with the anode active material layer, having a thickness from 1 nm to 100 μm and comprising an elastomer having a fully recoverable tensile elastic strain from 2% to 1,000% and a lithium ion conductivity from 10−8 S/cm to 5×10−2 S/cm when measure at room temperature; wherein the lithium metal secondary battery does not include a lithium-sulfur battery or a lithium-selenium battery.

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.

公开(公告)号：US11186729B2

公开(公告)日：2021-11-30

申请号：US16030105

申请日：2018-07-09

Applicant: Nanotek Instruments, Inc.

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

IPC: C09D7/63 ,  C09D175/04 ,  C09D5/24 ,  C09D175/02 ,  C09D175/12 ,  C09D163/00 ,  C09D167/08 ,  C23F11/04 ,  C08G71/04 ,  C08K11/00 ,  C09D5/08 ,  C09D5/10 ,  C08K3/04 ,  C08K3/08 ,  C08K3/32

Abstract: Provided is a humic acid-based coating suspension comprising humic acid, particles of an anti-corrosive pigment or sacrificial metal, and a binder resin dissolved or dispersed in a liquid medium, wherein the humic acid has a weight fraction from 0.1% to 50% based on the total coating suspension weight excluding the liquid medium. Also provided is an object or structure coated at least in part with such a coating.

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.

公开(公告)号：US11037738B2

公开(公告)日：2021-06-15

申请号：US15895456

申请日：2018-02-13

Applicant: Nanotek Instruments, Inc.

Inventor： Aruna Zhamu ,  Bor Z. Jang

IPC: H01G11/46 ,  H01G11/36 ,  H01G11/50 ,  H01G11/86 ,  H01G11/06 ,  H01G11/24 ,  H01M4/36 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/485

Abstract: A graphene-enabled hybrid particulate for use as an anode active material in a hybrid supercapacitor or lithium-ion capacitor, wherein the hybrid particulate is formed of a single or a plurality of graphene sheets and a single or a plurality of fine primary particles of a niobium-containing composite metal oxide, having a size from 1 nm to 10 μm, and the graphene sheets and the primary particles are mutually bonded or agglomerated into the hybrid particulate containing an exterior graphene sheet or multiple exterior graphene sheets embracing the primary particles, and wherein the hybrid particulate has an electrical conductivity no less than 10−4 S/cm and said graphene is in an amount of from 0.01% to 30% by weight based on the total weight of graphene and the niobium-containing composite metal oxide combined.

公开(公告)号：US11005094B2

公开(公告)日：2021-05-11

申请号：US15914213

申请日：2018-03-07

Applicant: Nanotek Instruments, Inc.

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

IPC: H01M4/00 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/42 ,  H01M4/44 ,  H01M4/46 ,  H01M4/48 ,  H01M4/485 ,  H01M4/505 ,  H01M4/58 ,  H01M4/02

Abstract: Provided is a lithium battery anode electrode comprising 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 inorganic filler-reinforced elastomer having from 0.01% to 50% by weight of an inorganic filler dispersed in an elastomeric matrix material based on the total weight of the inorganic filler-reinforced elastomer, wherein the encapsulating thin layer of inorganic filler-reinforced elastomer has a thickness from 1 nm to 10 μm, a fully recoverable tensile strain from 2% to 500%, and a lithium ion conductivity from 10−7 to S/cm to 5×10−2 S/cm and the inorganic filler has a lithium intercalation potential from 1.1 V to 4.5 V (preferably 1.2-2.5 V) versus Li/Li+. The anode active material is preferably selected from Si, Ge, Sn, SnO2, SiOx, Co3O4, Mn3O4, etc.