Patents by Inventor Mingming Geng
Mingming Geng 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).
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Patent number: 9337483Abstract: A pasted positive nickel hydroxide electrode for use in battery cells (e.g., in nickel zinc cells, and nickel metal hydride cells) includes nickel hydroxide particles, a cobalt metal and/or cobalt compound and a sulfur-containing complexing agent capable of forming a complex with cobalt. The presence of the sulfur-containing complexing agent, such as dialkyldithiocarbamate (e.g., sodium diethyldithiocarbamate) improves lifetime and capacity utilization of the nickel electrode. The resulting pasted nickel hydroxide electrode includes a CoOOH conductive matrix after formation. The surface of the nickel hydroxide particles in the electrode is modified in some embodiments by providing a cobalt-containing coating onto the surface of the nickel hydroxide particles, followed by oxidation with a strong oxidizing agent. The complexing agent can be added before, after, or during the oxidation.Type: GrantFiled: January 8, 2014Date of Patent: May 10, 2016Assignee: PowerGenix Systems, Inc.Inventor: Mingming Geng
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Publication number: 20140199591Abstract: A pasted positive nickel hydroxide electrode for use in battery cells (e.g., in nickel zinc cells, and nickel metal hydride cells) includes nickel hydroxide particles, a cobalt metal and/or cobalt compound and a sulfur-containing complexing agent capable of forming a complex with cobalt. The presence of the sulfur-containing complexing agent, such as dialkyldithiocarbamate (e.g., sodium diethyldithiocarbamate) improves lifetime and capacity utilization of the nickel electrode. The resulting pasted nickel hydroxide electrode includes a CoOOH conductive matrix after formation. The surface of the nickel hydroxide particles in the electrode is modified in some embodiments by providing a cobalt-containing coating onto the surface of the nickel hydroxide particles, followed by oxidation with a strong oxidizing agent. The complexing agent can be added before, after, or during the oxidation.Type: ApplicationFiled: January 8, 2014Publication date: July 17, 2014Applicant: PowerGenix Systems, Inc.Inventor: Mingming Geng
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Publication number: 20120018669Abstract: Active material for a positive electrode of a rechargeable alkaline electrochemical cell is made with nickel hydroxide particles or cobalt-coated nickel hydroxide particles treated with strongly oxidizing reagents such as alkali metal persulfate in alkaline solution. The active material also may be made with cobalt-coated nickel hydroxide particles having a high percentage of cobalt(III) on a surface or an average cobalt oxidation state of about 3 measured across the particles. The treated nickel hydroxide or cobalt-coated nickel hydroxide decreases the cobalt solubility in the alkaline electrolyte and increases the high-rate charge and discharge capability. The lower cobalt solubility decreases cobalt migration that can increase self discharge and lead to premature failure.Type: ApplicationFiled: September 30, 2011Publication date: January 26, 2012Applicant: POWERGENIX SYSTEMS, INC.Inventors: Mingming GENG, Samaresh MOHANTA, Jeffrey PHILLIPS, Zeiad M. MUNTASSER, Jeff BARTON
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Publication number: 20120018670Abstract: The nickel hydroxide particles for a nickel hydroxide electrode may be treated using an alkaline solution of a strong oxidizing agent such as sodium or potassium persulfate to modify the surface nickel hydroxide structure. The resulting modified surface structure has been found to impart various benefits to electrodes formed from the nickel hydroxide. It is believed that the oxidation of cobalt compounds at the surface of the nickel hydroxide particles results in a highly conductive cobalt compound that plays an important role in the high reliability, high stability and high capacity utilization of nickel electrodes as described herein.Type: ApplicationFiled: September 30, 2011Publication date: January 26, 2012Applicant: POWERGENIX SYSTEMS, INC.Inventors: Mingming GENG, Jeffrey PHILLIPS, Samaresh MOHANTA
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Patent number: 8048566Abstract: The nickel hydroxide particles for a nickel hydroxide electrode may be treated using an alkaline solution of a strong oxidizing agent such as sodium or potassium persulfate to modify the surface nickel hydroxide structure. The resulting modified surface structure has been found to impart various benefits to electrodes formed from the nickel hydroxide. It is believed that the oxidation of cobalt compounds at the surface of the nickel hydroxide particles results in a highly conductive cobalt compound that plays an important role in the high reliability, high stability and high capacity utilization of nickel electrodes as described herein.Type: GrantFiled: April 29, 2009Date of Patent: November 1, 2011Assignee: Powergenix Systems, Inc.Inventors: Mingming Geng, Jeffrey Phillips, Samaresh Mohanta
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Patent number: 8043748Abstract: Active material for a positive electrode of a rechargeable alkaline electrochemical cell is made with nickel hydroxide particles or cobalt-coated nickel hydroxide particles treated with strongly oxidizing reagents such as alkali metal persulfate in alkaline solution. The active material also may be made with cobalt-coated nickel hydroxide particles having a high percentage of cobalt(III) on a surface or an average cobalt oxidation state of about 3 measured across the particles. The treated nickel hydroxide or cobalt-coated nickel hydroxide decreases the cobalt solubility in the alkaline electrolyte and increases the high-rate charge and discharge capability. The lower cobalt solubility decreases cobalt migration that can increase self discharge and lead to premature failure.Type: GrantFiled: February 4, 2009Date of Patent: October 25, 2011Assignee: PowerGenix Systems, Inc.Inventors: Mingming Geng, Samaresh Mohanta, Jeffrey Phillips, Zeiad M. Muntasser, Jeff Barton
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Publication number: 20090208839Abstract: The nickel hydroxide particles for a nickel hydroxide electrode may be treated using an alkaline solution of a strong oxidizing agent such as sodium or potassium persulfate to modify the surface nickel hydroxide structure. The resulting modified surface structure has been found to impart various benefits to electrodes formed from the nickel hydroxide. It is believed that the oxidation of cobalt compounds at the surface of the nickel hydroxide particles results in a highly conductive cobalt compound that plays an important role in the high reliability, high stability and high capacity utilization of nickel electrodes as described herein.Type: ApplicationFiled: April 29, 2009Publication date: August 20, 2009Applicant: POWERGENIX SYSTEMS, INC.Inventors: Mingming Geng, Jeffrey Phillips, Samaresh Mohanta
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Publication number: 20090202904Abstract: Active material for a positive electrode of a rechargeable alkaline electrochemical cell is made with nickel hydroxide particles or cobalt-coated nickel hydroxide particles treated with strongly oxidizing reagents such as alkali metal persulfate in alkaline solution. The active material also may be made with cobalt-coated nickel hydroxide particles having a high percentage of cobalt(III) on a surface or an average cobalt oxidation state of about 3 measured across the particles. The treated nickel hydroxide or cobalt-coated nickel hydroxide decreases the cobalt solubility in the alkaline electrolyte and increases the high-rate charge and discharge capability. The lower cobalt solubility decreases cobalt migration that can increase self discharge and lead to premature failure.Type: ApplicationFiled: February 4, 2009Publication date: August 13, 2009Applicant: PowerGenix Systems, Inc.Inventors: Mingming Geng, Samaresh Mohanta, Jeffrey Phillips, Zeiad M. Muntasser, Jeff Barton
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Patent number: 5389333Abstract: The present invention discloses a hydrogen storage alloy having a formula ofMm.sub.1-a M.sub.a Ni.sub.b Mn.sub.c Co.sub.d Al.sub.e X.sub.fwherein, Mm is misch metal mainly containing La, Ce, Pr, Nd and the balance amount of unavoidable impurities; M is titanium, zirconium or the mixture thereof; X is nitrogen, boron or the mixture thereof; and a is in the range of 0.01-0.2; b is in the range of 3.50-4.60; c is in the range of 0.20-0.60; d is in the range of 0.10-0.7; e is in the range of 0.1-0.5; f is in the range of 0.005-0.2; and b+c+d+e+f is in the range of 4.8-5.4.Type: GrantFiled: August 31, 1993Date of Patent: February 14, 1995Assignee: Central Iron & Steel Research Institute of Ministry of Metallurgical IndustryInventors: Yufeng Li, Deming Xu, Mingming Geng, Jun Li, Siqing Xu