Patents by Inventor Hari Krishna Singh

Hari Krishna Singh 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).

  • P-toluenesulfonate doped polypyrrole/carbon composite electrode and a process for the preparation thereof
    Patent number: 10074453
    Abstract: Polypyrrole/carbon (PPy/C) composite doped with organic anion p-toluenesulfonate (pTS) is utilized as an electrode in supercapacitor for energy storage application. The surface initiated in-situ chemical oxidative polymerization yields a composite material PPy/C in the presence of varying concentrations of pTS. The novelty of the present invention lies in the doping of PPy/C composite with organic anion pTS and consequent enhancement of its electrochemical activity and stability. The conjugation length and electrical conductivity of pTS doped PPy/C composites increase with the increase in dopant concentration. The pTS doped PPy/C composite synthesized using equimolar concentration (0.1 M) of pTS to pyrrole shows the maximum specific capacitance of ˜395 F/g in 0.5 M Na2SO4 aqueous solution with significant stability ˜95% capacitance retention after ˜500 cycles.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: September 11, 2018
    Assignee: Council of Scientific & Industrial Research
    Inventors: Amit Kumar, Hari Krishna Singh, Rajiv Kumar Singh, Ramadhar Singh, Pankaj Srivastava
  • P-TOLUENESULFONATE DOPED POLYPYRROLE/CARBON COMPOSITE ELECTRODE AND A PROCESS FOR THE PREPARATION THEREOF
    Publication number: 20160055984
    Abstract: Polypyrrole/carbon (PPy/C) composite doped with organic anion p-toluenesulfonate (pTS) is utilized as an electrode in supercapacitor for energy storage application. The surface initiated in-situ chemical oxidative polymerization yields a composite material PPy/C in the presence of varying concentrations of pTS. The novelty of the present invention lies in the doping of PPy/C composite with organic anion pTS and consequent enhancement of its electrochemical activity and stability. The conjugation length and electrical conductivity of pTS doped PPy/C composites increase with the increase in dopant concentration. The pTS doped PPy/C composite synthesized using equimolar concentration (0.1 M) of pTS to pyrrole shows the maximum specific capacitance of ˜395 F/g in 0.5 M Na2SO4 aqueous solution with significant stability ˜95% capacitance retention after ˜500 cycles.
    Type: Application
    Filed: August 21, 2014
    Publication date: February 25, 2016
    Inventors: Amit Kumar, Hari Krishna Singh, Rajiv Kumar Singh, Ramadhar Singh, Pankaj Srivastava