Patents by Inventor Yanbo Wang

Yanbo Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9085076
    Abstract: A portable power tool comprises an electric motor, actuator, or light-emitting hardware and a rechargeable power source connected to the electric motor, actuator, or light-emitting hardware, wherein the power source contains at least a surface-mediated cell (SMC). The power tools include, but are not limited to, impact driver, air compressor, alligator shear, angle grinder, band saw, belt sander, biscuit joiner, ceramic tile cutter tile saw, chainsaw, circular saw, concrete saw, cold saw, crusher, diamond blade, diamond tools, disc sander, drill, floor sander, grinding machine, heat gun, impact wrench, jackhammer, jointer, jigsaw, lathe, miter saw, nail gun, needle scaler, torque wrench, powder-actuated tools, power wrench, radial arm saw, random orbital sander, reciprocating saw, rotary reciprocating saw, rotary tool, sabre saw, sander, scroll saw, steel cut off saw, table saw, thickness planer, trimmer, wall chaser, wood router, or flashlight.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: July 21, 2015
    Assignee: Nanotek Instruments, Inc.
    Inventors: Aruna Zhamu, Guorong Chen, Wei Xiong, Bor Z. Jang, Yanbo Wang, Qing Fang
  • Patent number: 9059481
    Abstract: A non-flammable quasi-solid electrolyte and a rechargeable non-lithium alkali metal cell containing this electrolyte. The electrolyte comprises an alkali metal salt dissolved in an organic liquid solvent with a concentration higher than 2.5 M (preferably >3.5 M) or a molecular ratio greater than 0.2 (preferably >0.3), wherein the alkali metal is selected from Na, K, a combination of Na and K, or a combination of Na and/or K with Li. The alkali metal salt concentration is sufficiently high so that the electrolyte exhibits a vapor pressure <0.01 kPa when measured at 20° C., a vapor pressure <60% of the vapor pressure of thet organic solvent when measured alone, a flash point at least 20 degrees Celsius higher than a flash point of the organic liquid solvent when measured alone, a flash point higher than 150° C., or no detectable flash point.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: June 16, 2015
    Assignee: Nanotek Instruments, Inc.
    Inventors: Hui He, Bor Z Jang, Yanbo Wang, Aruna Zhamu
  • Publication number: 20150064574
    Abstract: A non-flammable quasi-solid electrolyte and a rechargeable non-lithium alkali metal cell containing this electrolyte. The electrolyte comprises an alkali metal salt dissolved in an organic liquid solvent with a concentration higher than 2.5 M (preferably >3.5 M) or a molecular ratio greater than 0.2 (preferably >0.3), wherein the alkali metal is selected from Na, K, a combination of Na and K, or a combination of Na and/or K with Li. The alkali metal salt concentration is sufficiently high so that the electrolyte exhibits a vapor pressure <0.01 kPa when measured at 20° C., a vapor pressure <60% of the vapor pressure of thet organic solvent when measured alone, a flash point at least 20 degrees Celsius higher than a flash point of the organic liquid solvent when measured alone, a flash point higher than 150° C., or no detectable flash point.
    Type: Application
    Filed: August 30, 2013
    Publication date: March 5, 2015
    Inventors: Hui He, Bor Z. Jang, Yanbo Wang, Aruna Zhamu
  • Publication number: 20150064575
    Abstract: A rechargeable lithium-selenium cell comprising a cathode having a cathode active material selected from Se or SexSy (x/y ratio=0.01 to 100), an anode having an anode active material, a porous separator electronically separating the anode and the cathode, a non-flammable quasi-solid electrolyte in contact with the cathode and the anode, wherein the electrolyte contains a lithium salt dissolved in a first organic liquid solvent with a lithium salt concentration sufficiently high (at least 2.0 M, more preferably >3.0 M) so that the electrolyte exhibits a vapor pressure less than 0.01 kPa when measured at 20° C., a flash point at least 20 degrees Celsius higher than the flash point of the first organic liquid solvent alone, a flash point higher than 150° C., or no flash point. This battery cell is non-flammable and safe, has a long cycle life, high capacity, and high energy density.
    Type: Application
    Filed: September 3, 2013
    Publication date: March 5, 2015
    Inventors: Hui He, Bor Z. Jang, Yanbo Wang, Aruna Zhamu
  • Publication number: 20150044565
    Abstract: The present invention provides a process for producing a graphene-enhanced anode active material for use in a lithium battery. The process comprises (a) providing a continuous film of a graphene material into a deposition zone; (b) introducing vapor or atoms of a precursor anode active material into the deposition zone, allowing the vapor or atoms to deposit onto a surface of the graphene material film to form a sheet of an anode active material-coated graphene material; and (c) mechanically breaking this sheet into multiple pieces of anode active material-coated graphene; wherein the graphene material is in an amount of from 0.1% to 99.5% by weight and the anode active material is in an amount of at least 0.5% by weight, all based on the total weight of the graphene material and the anode active material combined.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 12, 2015
    Inventors: Yanbo Wang, Bor Z. Jang, Hui He, Aruna Zhamu
  • Publication number: 20150044556
    Abstract: The present invention provides a cathode (positive electrode) of a lithium battery and a process for producing this cathode. The electrode comprises a cathode active material-coated graphene sheet and the graphene sheet has two opposed parallel surfaces, wherein at least 50% area (preferably >80%) of one of the two surfaces is coated with a cathode active material coating. The graphene material is in an amount of from 0.1% to 99.5% by weight and the cathode active material is in an amount of at least 0.5% by weight (preferably >80% and more preferably >90%), all based on the total weight of the graphene material and the cathode active material combined. The cathode active material is preferably an inorganic material, an organic or polymeric material, a metal oxide/phosphate/sulfide, or a combination thereof. The invention also provides a lithium battery, including a lithium-ion, lithium-metal, or lithium-sulfur battery.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 12, 2015
    Inventors: Yanbo Wang, Bor Z. Jang, Hui He, Aruna Zhamu
  • Publication number: 20150044564
    Abstract: The present invention provides an anode electrode of a lithium-ion battery, comprising an anode active material-coated graphene sheet, wherein the graphene sheet has two opposed parallel surfaces and at least 50% area of one of the surfaces is coated with an anode active material and wherein the graphene material is in an amount of from 0.1% to 99.5% by weight and the anode active material is in an amount of at least 0.5% by weight (preferably at least 60%), all based on the total weight of the graphene material and the anode active material combined.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 12, 2015
    Inventors: Yanbo Wang, Bor Z. Jang, Hui He, Aruna Zhamu
  • Publication number: 20150028263
    Abstract: Disclosed is a facile and cost effective method of producing nano silicon powder or graphene-doped silicon nano powder having a particle size smaller than 100 nm. The method comprises: (a) preparing a silicon precursor/graphene nano composite; (b) mixing the silicon precursor/graphene nano composite with a desired quantity of magnesium; (c) converting the silicon precursor to form a mixture of graphene-doped silicon and a reaction by-product through a thermal and/or chemical reduction reaction; and (d) removing the reaction by-product from the mixture to obtain graphene-doped silicon nano powder.
    Type: Application
    Filed: July 26, 2013
    Publication date: January 29, 2015
    Inventors: Yanbo Wang, Bor Z. Jang, Aruna Zhamu
  • Publication number: 20150024248
    Abstract: A separator-electrolyte layer product for use in a lithium battery, comprising: (a) a porous thin-film separator selected from a porous polymer film, a porous mat, fabric, or paper made of polymer or glass fibers, or a combination thereof, wherein the separator has a thickness less than 500 ?m; and (b) a non-flammable quasi-solid electrolyte containing a lithium salt dissolved in a liquid solvent up to a concentration no less than 3 M; wherein the porous thin-film separator is coated with the quasi-solid electrolyte so that the layer product exhibits a vapor pressure less than 0.01 kPa when measured at 20° C., a vapor pressure less than 60% of the vapor pressure of the liquid solvent alone, a flash point at least 20 degrees Celsius higher than a flash point of the first liquid solvent alone, a flash point higher than 150° C., or no detectable flash point.
    Type: Application
    Filed: July 22, 2013
    Publication date: January 22, 2015
    Inventors: Hui He, Bor Z. Jang, Yanbo Wang, Aruna Zhamu
  • Publication number: 20150024121
    Abstract: A process for producing a separator-electrolyte layer for use in a lithium battery, comprising: (a) providing a porous separator; (b) providing a quasi-solid electrolyte containing a lithium salt dissolved in a first liquid solvent up to a first concentration no less than 3 M; and (c) coating or impregnating the separator with the electrolyte to obtain the separator-electrolyte layer with a final concentration ?the first concentration so that the electrolyte exhibits a vapor pressure less than 0.01 kPa when measured at 20° C., a vapor pressure less than 60% of that of the first liquid solvent alone, a flash point at least 20 degrees Celsius higher than a flash point of the first liquid solvent alone, a flash point higher than 150° C., or no detectable flash point. A battery using such a separator-electrolyte is non-flammable and safe, has a long cycle life, high capacity, and high energy density.
    Type: Application
    Filed: July 22, 2013
    Publication date: January 22, 2015
    Inventors: Hui He, Bor Z. Jang, Yanbo Wang, Aruna Zhamu
  • Patent number: 8914176
    Abstract: This invention provides a vehicle powered by a surface-mediated cell (SMC)-based power source, comprising a vehicle frame, at least a wheel supporting the frame or a propeller connected to the frame, a drive unit connected to the wheel or propeller, and a power source electrically connected to the drive unit, wherein the power source contains at least a surface-mediated cell. The vehicle can be a micro-EV (using the SMC for the stop-start function), HEV, plug-in HEV, all-electric vehicle, power-assisted bicycle, scooter, motorcycle, tricycle, automobile, wheelchair, fork lift, golf cart, specialty vehicle, bus, truck, train, rapid-transit vehicle, boat, or air vehicle. The ultra-high power density enables the SMC to provide pulsed power or increased current demands when the vehicle is accelerating or hill-climbing. The SMC also enables the power source to recuperate the braking energy when the vehicle decelerates, brakes, or simply moves down-hill.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: December 16, 2014
    Assignee: Nanotek Instruments, Inc.
    Inventors: Aruna Zhamu, Guorong Chen, Xiqing Wang, Bor Z. Jang, Yanbo Wang, Qing Fang
  • Publication number: 20140363746
    Abstract: A rechargeable lithium cell comprising a cathode having a cathode active material, an anode having an anode active material, a porous separator electronically separating the anode and the cathode, a non-flammable quasi-solid electrolyte in contact with the cathode and the anode, wherein the electrolyte contains a lithium salt dissolved in a first organic liquid solvent with a concentration sufficiently high so that the electrolyte exhibits a vapor pressure less than 0.01 kPa when measured at 20° C., a flash point at least 20 degrees Celsius higher than the flash point of the first organic liquid solvent alone, a flash point higher than 150° C., or no flash point. This battery cell is non-flammable and safe, has a long cycle life, high capacity, and high energy density.
    Type: Application
    Filed: June 10, 2013
    Publication date: December 11, 2014
    Inventors: Hui He, Bor Z. Jang, Yanbo Wang, Aruna Zhamu
  • Patent number: 8895189
    Abstract: A surface-mediated cell (SMC) comprising: (a) a cathode comprising a carbon-based cathode active material having a surface area to capture or store lithium thereon; (b) an anode comprising an anode current collector alone, or combined anode current collector and anode active material; (c) a porous separator disposed between the anode and the cathode; (d) a lithium-containing electrolyte, wherein the anode and/or cathode active material has a specific surface area no less than 100 m2/g in direct physical contact with the electrolyte to receive lithium ions therefrom or to provide lithium ions thereto; and (e) a lithium source disposed in at least one of the two electrodes when the cell is made, and the cell has an open-circuit voltage (OCV) of at least 0.8 volts; wherein the cell operates between a lower voltage limit lower than the OCV and an upper limit of between 3.8 and 4.5 volts.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: November 25, 2014
    Assignee: Nanotek Instruments, Inc.
    Inventors: Aruna Zhamu, Guorong Chen, Xiqing Wang, Bor Z. Jang, Yanbo Wang, Qing Fang
  • Publication number: 20140342249
    Abstract: A rechargeable lithium metal or lithium-ion cell comprising a cathode having a cathode active material and/or a conductive supporting structure, an anode having an anode active material and/or a conductive supporting nano-structure, a porous separator electronically separating the anode and the cathode, a highly concentrated electrolyte in contact with the cathode active material and the anode active material, wherein the electrolyte contains a lithium salt dissolved in an ionic liquid solvent with a concentration greater than 3 M. The cell exhibits an exceptionally high specific energy, a relatively high power density, a long cycle life, and high safety with no flammability.
    Type: Application
    Filed: May 16, 2013
    Publication date: November 20, 2014
    Inventors: Hui He, Bor Z Jang, Yanbo Wang, Aruna Zhamu
  • Publication number: 20140342209
    Abstract: A rechargeable lithium-sulfur cell comprising a cathode, an anode, a separator electronically separating the two electrodes, a first electrolyte in contact with the cathode, and a second electrolyte in contact with the anode, wherein the first electrolyte contains a first concentration, C1, of a first lithium salt dissolved in a first solvent when the first electrolyte is brought in contact with the cathode, and the second electrolyte contains a second concentration, C2, of a second lithium salt dissolved in a second solvent when the second electrolyte is brought in contact with the anode, wherein C1 is less than C2. The cell exhibits an exceptionally high specific energy and a long cycle life.
    Type: Application
    Filed: May 16, 2013
    Publication date: November 20, 2014
    Inventors: Hui He, Boz Z Jang, Yanbo Wang, Aruna Zhamu, Wei Xiong
  • Publication number: 20140315100
    Abstract: A rechargeable lithium-sulfur cell comprising an anode, a separator and/or electrolyte, a sulfur cathode, an optional anode current collector, and an optional cathode current collector, wherein the cathode comprises (a) exfoliated graphite worms that are interconnected to form a porous, conductive graphite flake network comprising pores having a size smaller than 100 nm; and (b) nano-scaled powder or coating of sulfur, sulfur compound, or lithium polysulfide disposed in the pores or coated on graphite flake surfaces wherein the powder or coating has a dimension less than 100 nm. The exfoliated graphite worm amount is in the range of 1% to 90% by weight and the amount of powder or coating is in the range of 99% to 10% by weight based on the total weight of exfoliated graphite worms and sulfur (sulfur compound or lithium polysulfide) combined. The cell exhibits an exceptionally high specific energy and a long cycle life.
    Type: Application
    Filed: April 22, 2013
    Publication date: October 23, 2014
    Inventors: Yanbo Wang, Bor Z. Jang, Hui He, Aruna Zhamu, Yi-jun Lin
  • Patent number: 8861669
    Abstract: The present disclosure provides techniques for recovering source stream clock data at the sink in a high definition multimedia digital content transport system. The disclosure includes a fractional-N Phase-Locked Loop (PLL) based clock generator, a programmable Sigma-Delta Modulator (SDM), and a clock data calibrator to fully recover the original source stream clock data. The fractional-N PLL provides flexible source stream clock recovery. When there is a frequency deviation between the original clock and the regenerated clock, the clock data calibrator control circuit adjusts the clock data, preventing any stream data buffer overflow or underflow problems. The disclosed techniques are compatible with the sink devices based on the standards of DisplayPort and HDMI.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: October 14, 2014
    Assignee: Synaptics Incorporated
    Inventors: Xiaoqian Zhang, Shubing Zhai, Yanbo Wang
  • Patent number: 8790814
    Abstract: An inorganic material based surface-mediated cell (SMC) comprising (a) a cathode comprising a non-carbon-based inorganic cathode active material having a surface area to capture and store lithium thereon; (b) an anode comprising an anode current collector alone or both an anode current collector and an anode active material; (c) a porous separator; (d) a lithium-containing electrolyte in physical contact with the two electrodes, wherein the cathode has a specific surface area no less than 100 m2/g which is in direct physical contact with said electrolyte to receive lithium ions therefrom or to provide lithium ions thereto; and (e) a lithium source. This inorganic SMC provides both high energy density and high power density not achievable by supercapacitors and lithium-ion cells.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: July 29, 2014
    Assignee: Nanotek Instruments, Inc.
    Inventors: Yanbo Wang, Guorong Chen, Zhenning Yu, Bor Z. Jang, Aruna Zhamu
  • Patent number: 8765303
    Abstract: A lithium-ion cell comprising: (A) a cathode comprising graphene as the cathode active material having a surface area to capture and store lithium thereon and wherein said graphene cathode is meso-porous having a specific surface area greater than 100 m2/g; (B) an anode comprising an anode active material for inserting and extracting lithium, wherein the anode active material is mixed with a conductive additive and/or a resin binder to form a porous electrode structure, or coated onto a current collector in a coating or thin film form; (C) a porous separator disposed between the anode and the cathode; (D) a lithium-containing electrolyte in physical contact with the two electrodes; and (E) a lithium source disposed in at least one of the two electrodes when the cell is made. This new Li-ion cell exhibits an unprecedentedly high energy density.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: July 1, 2014
    Assignee: Nanotek Instruments, Inc.
    Inventors: Guorong Chen, Aruna Zhamu, Xiging Wang, Bor Z. Jang, Yanbo Wang, Qing Fang
  • Publication number: 20130330611
    Abstract: A rechargeable lithium cell comprising: (a) an anode comprising a prelithiated lithium storage material or a combination of a lithium storage material and a lithium ion source; (b) a hybrid cathode active material composed of a meso-porous structure of a carbon, graphite, metal, or conductive polymer and a phthalocyanine compound, wherein the meso-porous structure is in an amount of from 1% to 99% by weight based on the total weight of the meso-porous structure and the phthalocyanine combined, and wherein the meso-porous structure has a pore with a size from 2 nm to 50 nm to accommodate phthalocyanine compound therein; and (c) an electrolyte or electrolyte/separator assembly. This secondary cell exhibits a long cycle life and the best cathode specific capacity and best cell-level specific energy of all rechargeable lithium-ion cells ever reported.
    Type: Application
    Filed: June 11, 2012
    Publication date: December 12, 2013
    Inventors: Gourong Chen, Yanbo Wang, Aruna Zhamu, Bor Z. Jang