Patents by Inventor Yingyi HE

Yingyi HE 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).

  • Method for preparing graphene by liquid-phase ball milling exfoliation
    Patent number: 11167992
    Abstract: Provided is a method for preparing graphene by liquid-phase ball milling exfoliation, including following steps: mixing a transition metal halide salt, a nitrogen source substance and an organic solvent to prepare an intercalation agent; mixing the intercalation agent with graphite, carrying out ball milling, and then performing centrifugation to obtain a graphite intercalation compound; washing and filtering the graphite intercalation compound obtained, adding an expansion agent, and carrying out ultrasonic agitation to obtain a graphene dispersion; and washing, filtering and drying the graphene dispersion to obtain graphene powder.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: November 9, 2021
    Assignee: GUANGZHOU SPECIAL PRESSURE EQUIPMENT INSPECTION AND RESEARCH INSTITUTE
    Inventors: Bo Yang, Shuanghong Zhang, Maodong Li, Wei Zhai, Fang Wen, Yue Li, Huachao Guo, Zhigang Wang, Guojia Huang, Shiping Li, Zhenling Wu, Yingyi He
  • METHOD FOR PREPARING GRAPHENE BY LIQUID-PHASE BALL MILLING EXFOLIATION
    Publication number: 20200010325
    Abstract: Provided is a method for preparing graphene by liquid-phase ball milling exfoliation, including following steps: mixing a transition metal halide salt, a nitrogen source substance and an organic solvent to prepare an intercalation agent; mixing the intercalation agent with graphite, carrying out ball milling, and then performing centrifugation to obtain a graphite intercalation compound; washing and filtering the graphite intercalation compound obtained, adding an expansion agent, and carrying out ultrasonic agitation to obtain a graphene dispersion; and washing, filtering and drying the graphene dispersion to obtain graphene powder.
    Type: Application
    Filed: July 1, 2019
    Publication date: January 9, 2020
    Inventors: Bo YANG, Shuanghong ZHANG, Maodong LI, Wei ZHAI, Fang WEN, Yue LI, Huachao GUO, Zhigang WANG, Guojia HUANG, Shiping LI, Zhenling WU, Yingyi HE
  • INTERCALATION AGENT FOR RAPID GRAPHITE EXFOLIATION IN MASS PRODUCTION OF HIGH-QUALITY GRAPHENE
    Publication number: 20200010326
    Abstract: An intercalation agent for rapid graphite exfoliation in mass production of high-quality graphene is provided, including a transition metal halide salt, a nitrogen source substance and an organic solvent, and the mass ratio of the transition metal halide salt, the nitrogen source substance and the organic solvent is (1-10):1:(2-10). The transition metal halide salt can form a eutectic with the nitrogen source substance or the organic solvent, and the melting point thereof is lower than that of each component, thereby lowering the reaction temperature, and the preparation cost and difficulty; and a hydrogen bond can also be formed between the nitrogen source substance and the organic solvent, thereby avoiding interlayer stacking of the prepared graphene, thus improving the exfoliation efficiency and the product quality.
    Type: Application
    Filed: July 1, 2019
    Publication date: January 9, 2020
    Inventors: Bo YANG, Guojia HUANG, Maodong LI, Yue LI, Fang WEN, Huachao GUO, Wei ZHAI, Shuanghong ZHANG, Zhigang WANG, Shiping LI, Zhenling WU, Yingyi HE