Patents by Inventor Junhang Dong

Junhang Dong 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).

  • Publication number: 20250065297
    Abstract: The present invention relates to methods for synthesizing MFI zeolite nanosheet (ZN) assemblies and open-pore ZN plates and for tiling ZN plates on polymer supports. Methods for producing ZN assemblies and ZN plates may reduce or eliminate the need to synthesize nanoparticle (NP) seed-evolved single-crystal zeolite nanosheets (ZNs) as an intermediate product. Methods for tiling ZN plates on polymer supports may produce ZN plate-tiled (ZNPT) membranes with reduced permeation through intercrystalline spaces.
    Type: Application
    Filed: January 9, 2023
    Publication date: February 27, 2025
    Inventors: Junhang Dong, Zishu Cao, Landysh Iskhakova
  • Patent number: 9911985
    Abstract: A composite structure comprising a layer of zeolite having a high silica to alumina ratio supported on a support layer acts as a separator in a redox flow battery. The zeolite can be either supported on a rigid substrate, such as alumina, or a flexible substrate, such as a polymeric film. The polymeric film, in particular, can be an ion exchange membrane such as Nafion. The zeolite layer with a high silica to aluminum ratio provides a long-lasting separator for redox flow batteries.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: March 6, 2018
    Assignees: University Of Cincinnati, Bettergy Corp.
    Inventors: Junhang Dong, Zhi Xu, Lin-Feng Li, Ruidong Yang
  • Publication number: 20170162881
    Abstract: A separator for a redox flow battery includes a support layer having a first side, and a zeolite layer formed on the first side of the support layer. The support layer includes a porous substrate that is a carbon substrate or a carbon coated substrate. A redox flow battery includes a first oxidizing reaction chamber, a second reducing reaction chamber, and a separator dividing said first oxidizing reaction chamber and said second reducing reaction chamber. The separator includes a zeolite layer formed onto a support layer. The support layer includes a porous substrate that is a carbon substrate or a carbon coated substrate.
    Type: Application
    Filed: October 14, 2016
    Publication date: June 8, 2017
    Inventors: Junhang Dong, Zhi Xu
  • Publication number: 20150044537
    Abstract: A composite structure comprising a layer of zeolite having a high silica to alumina ratio supported on a support layer acts as a separator in a redox flow battery. The zeolite can be either supported on a rigid substrate, such as alumina, or a flexible substrate, such as a polymeric film. The polymeric film, in particular, can be an ion exchange membrane such as Nafion. The zeolite layer with a high silica to aluminum ratio provides a long-lasting separator for redox flow batteries.
    Type: Application
    Filed: August 7, 2014
    Publication date: February 12, 2015
    Inventors: Junhang Dong, Zhi Xu, Lin-Feng Li, Ruidong Yang
  • Publication number: 20040247791
    Abstract: A method for preparing nanocrystalline ceramic thin films, particularly at low firing temperatures <1000° C. The method for preparing ceramic thin films comprises preparing a seed gel of metal oxide, dissolving a source compound for cations of the oxide's metal constituents in the solution, then adding a polymerizable organic solvent to the solution and heating to form a polymeric precursor having uniformly dispersed gel seeds within a solid gel structure whereby any voids within the structure are filled with metal cation-containing polymeric precursor. The polymeric precursor is free of precipitates. A surface of a substrate is then coated with at least one layer of the gel-seeded polymeric precursor to form a uniform film of gel-seeded polymeric precursor wherein the film has a thickness of 100 nm to 200 nm per layer. The film is then sintered to convert the film to a nanocrystalline ceramic thin film having a thickness of 100 nm to 1 &mgr;m and being substantially free of defects.
    Type: Application
    Filed: June 3, 2003
    Publication date: December 9, 2004
    Applicant: United States Department of Energy
    Inventors: Michael Z. Hu, Junhang Dong
  • Publication number: 20030228969
    Abstract: The present invention is a method for synthesizing zeolite membranes, particularly a method for synthesizing supported zeolite membranes by wet gel crystallization in a vapor-phase. The method of the present invention is a method for synthesizing zeolite membranes comprising the steps of first coating a support surface with a wet gel precursor sol to form a uniform layer of the precursor sol on the support surface. The wet gel precursor sol comprises a silicate or aluminosilicate species and a template or structure-directing agent.
    Type: Application
    Filed: June 11, 2002
    Publication date: December 11, 2003
    Inventors: Junhang Dong, Michael Z. Hu, Edward A. Payzant
  • Patent number: 6495617
    Abstract: The present invention is directed to the effects of applied electric fields on liquid-liquid dispersions. In general, the present invention is directed to the control of phase inversions in liquid-liquid dispersions. Because of polarization and deformation effects, coalescence of aqueous drops is facilitated by the application of electric fields. As a result, with an increase in the applied voltage, the ambivalence region is narrowed and shifted toward higher volume fractions of the dispersed phase. This permits the invention to be used to ensure that the aqueous phase remains continuous, even at a high volume fraction of the organic phase. Additionally, the volume fraction of the organic phase may be increased without causing phase inversion, and may be used to correct a phase inversion which has already occurred. Finally, the invention may be used to enhance mass transfer rates from one phase to another through the use of phase inversions.
    Type: Grant
    Filed: September 16, 1999
    Date of Patent: December 17, 2002
    Assignee: UT-Battelle LLC
    Inventors: Constantinos Tsouris, Junhang Dong