Patents by Inventor Byoungwoo Kang
Byoungwoo Kang 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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Publication number: 20230327127Abstract: Disclosed are a lithium-ion supply electrode for real-time microscopic analysis and a method of manufacturing same. The lithium-ion supply electrode includes a solid electrolyte layer including a solid electrolyte, a lithium layer formed on the solid electrolyte layer and including lithium, and a protective layer formed on the lithium layer and including a metal. Therefore, lithium in the electrode does not undergo oxidation in a short time. Therefore, the lithium-ion supply electrode can be used for real-time analysis of structural changes and interfacial reactions of lithium secondary battery materials using a transmission electron microscope.Type: ApplicationFiled: December 27, 2022Publication date: October 12, 2023Inventors: Si-Young CHOI, Byoungwoo KANG, Yu-Jeong YANG, So-Yeon KIM, Abin KIM
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Publication number: 20220278320Abstract: A composite positive active material represented by Formula 1, LiaNibCOcMndMeO2??Formula 1 wherein, in Formula 1, M is zirconium (Zr), aluminum (Al), rhenium (Re), vanadium (V), chromium (Cr), iron (Fe), gallium (Ga), silicon (Si), boron (B), ruthenium (Ru), titanium (Ti), niobium (Nb), molybdenum (Mo), magnesium (Mg), or platinum (Pt), 1.1?a?1.3, b+c+d+e?1, 0?b?0.3, 0?c?0.3, 0<d?0.6, and 0?e?0.1, wherein, through atomic interdiffusion of lithium and the metal, the composite positive active material has a uniform distribution of lithium excess regions and a uniform degree of disorder of metal cations, and the metal cations have a disordered, irregular arrangement at an atomic scale. Also a method of preparing the composite positive active material, a positive electrode including the composite positive active material, and a lithium battery including the positive electrode.Type: ApplicationFiled: May 19, 2022Publication date: September 1, 2022Inventors: Donghee Yeon, Byoungwoo Kang, Junghwa Lee, Byungjin Choi, Sukgi Hong, Jinsu Ha
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Patent number: 11362330Abstract: A composite positive active material represented by Formula 1, LiaNibCocMndMeO2??Formula 1 wherein, in Formula 1, M is zirconium (Zr), aluminum (Al), rhenium (Re), vanadium (V), chromium (Cr), iron (Fe), gallium (Ga), silicon (Si), boron (B), ruthenium (Ru), titanium (Ti), niobium (Nb), molybdenum (Mo), magnesium (Mg), or platinum (Pt), 1.1?a?1.3, b+c+d+e?1, 0?b?0.3, 0?c?0.3, 0<d?0.6, and 0?e?0.1, wherein, through atomic interdiffusion of lithium and the metal, the composite positive active material has a uniform distribution of lithium excess regions and a uniform degree of disorder of metal cations, and the metal cations have a disordered, irregular arrangement at an atomic scale. Also a method of preparing the composite positive active material, a positive electrode including the composite positive active material, and a lithium battery including the positive electrode.Type: GrantFiled: October 1, 2019Date of Patent: June 14, 2022Assignees: SAMSUNG ELECTRONICS CO., LTD., POSTECH ACADEMY-INDUSTRY FOUNDATIONInventors: Donghee Yeon, Byoungwoo Kang, Junghwa Lee, Byungjin Choi, Sukgi Hong, Jinsu Ha
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Publication number: 20220149427Abstract: A solid solution electrolyte suitable for solid-state rechargeable lithium ion battery comprising a compound having a general formula Li(3.5+L+x)Si(0.5+s?x)P(0.5+p?x)Ge2xO4+a wherein ?0.10?L?0.10, ?0.10?s?0.10, ?0.10?p?0.10, ?0.40?a?0.40, and 0.0<x?0.30, preferably 0.05?x?0.30.Type: ApplicationFiled: February 19, 2020Publication date: May 12, 2022Inventors: Byoungwoo KANG, Seung-Jun WOO
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Publication number: 20220085368Abstract: A catholyte destined to be used in a lithium ion solid-state battery, said catholyte comprising: (i) a solid electrolyte powder having a formula: Li(3.5+L+x)Si(0.5+s?x)P(0.5+p?x)Ge2xO4+a, wherein ?0.10?L?0.10, ?0.10?s?0.10, ?0.10?p?0.10, ?0.40?a?0.40, and 0.00?x?0.30, and (ii) a positive electrode active material powder having a formula: Li1+kM?1?kO2 where M?=Ni1?x??y?z?Mnx?Coy?Az? with ?0.05?k?0.05, 0?x??0.40, 0.05?y??0.40, and 0?z??0.05, wherein A is a doping element which is different to Li, M? and O, said positive active material powder comprising particles having a layered R-3m crystal structure, said catholyte having a D99?50 ?m and an ionic conductivity of at least 1.0×10?6 S/m.Type: ApplicationFiled: February 19, 2020Publication date: March 17, 2022Inventors: Byoungwoo KANG, Seung-Jun WOO
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Publication number: 20200168906Abstract: A composite positive active material represented by Formula 1, LiaNibCocMndMeO2??Formula 1 wherein, in Formula 1, M is zirconium (Zr), aluminum (Al), rhenium (Re), vanadium (V), chromium (Cr), iron (Fe), gallium (Ga), silicon (Si), boron (B), ruthenium (Ru), titanium (Ti), niobium (Nb), molybdenum (Mo), magnesium (Mg), or platinum (Pt), 1.1?a?1.3, b+c+d+e?1, 0?b?0.3, 0?c?0.3, 0<d?0.6, and 0?e?0.1, wherein, through atomic interdiffusion of lithium and the metal, the composite positive active material has a uniform distribution of lithium excess regions and a uniform degree of disorder of metal cations, and the metal cations have a disordered, irregular arrangement at an atomic scale. Also a method of preparing the composite positive active material, a positive electrode including the composite positive active material, and a lithium battery including the positive electrode.Type: ApplicationFiled: October 1, 2019Publication date: May 28, 2020Inventors: Donghee Yeon, Byoungwoo Kang, Junghwa Lee, Byungjin Choi, Sukgi Hong, Jinsu Ha
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Patent number: 9172090Abstract: The present invention generally relates to certain lithium materials, including lithium manganese borate materials. Such materials are of interest in various applications such as energy storage. Certain aspects of the invention are directed to lithium manganese borate materials, for example, having the formula LixMny(BO3). In some cases, the lithium manganese borate materials may include other elements, such as iron, magnesium, copper, zinc, calcium, etc. The lithium manganese borate materials, according to one set of embodiments, may be present as a monoclinic crystal system. Such materials may surprisingly exhibit relatively high energy storage capacities, for example, at least about 96 mA h/g. Other aspects of the invention relate to devices comprising such materials, methods of making such materials, kits for making such materials, methods of promoting the making or use of such materials, and the like.Type: GrantFiled: May 5, 2011Date of Patent: October 27, 2015Assignee: Massachusetts Institute of TechnoloyInventors: Gerbrand Ceder, Jae Chul Kim, ByoungWoo Kang, Charles J. Moore, Geoffroy Hautier
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Patent number: 9159991Abstract: This invention relates generally to electrode materials, electrochemical cells employing such materials, and methods of synthesizing such materials. The electrode materials have a crystal structure with a high ratio of Li to metal M, which is found to improve capacity by enabling the transfer of a greater amount of lithium per metal, and which is also found to improve stability by retaining a sufficient amount of lithium after charging. Furthermore, synthesis techniques are presented which result in improved charge and discharge capacities and reduced particle sizes of the electrode materials.Type: GrantFiled: March 18, 2013Date of Patent: October 13, 2015Assignee: Massachusetts Institute of TechnologyInventors: Gerbrand Ceder, Anubhav Jain, Geoffroy Hautier, Jae Chul Kim, Byoungwoo Kang, Robert Daniel
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Patent number: 8999282Abstract: The present invention generally relates to carbophosphates and other compounds. Such compounds may be used in batteries and other electrochemical devices, or in other applications such as those described herein. One aspect of the invention is generally directed to carbophosphate compounds, i.e., compounds containing carbonate and phosphate ions. For example, according to one set of embodiments, the compound has a formula Ax(M)(PO4)a(CO3)b, where M comprises one or more cations. A may include one or more alkali metals, for example, lithium and/or sodium. In some cases, x is greater than about 0.1, a is between about 0.1 and about 5.1, and b is between about 0.1 and about 5.1. In certain embodiments, the compound may have a unit cell atomic arrangement that is isostructural to unit cells of the minerals sidorenkite, bonshtedtite, bradleyite, crawfordite, or ferrotychite.Type: GrantFiled: February 22, 2011Date of Patent: April 7, 2015Assignee: Massachusetts Institute of TechnologyInventors: Gerbrand Ceder, Hailong Chen, Robert E. Doe, Geoffroy Hautier, Anubhav Jain, ByoungWoo Kang
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Patent number: 8568611Abstract: The present invention generally relates to unique coatings for use with energy storage particles, such as lithium oxide energy storage materials. The invention provides unique coatings for particles, unique particle/coating combinations, and unique methods for making coatings and/or coated particles. In one aspect of the invention, a particle is formed having a core and a coating. The particle may comprise a core having a material such as LiFePO4, and a coating. The particle may be formed, in some embodiments, by using a non-stoichiometric combination of salts or other precursors, and sintering the same to form particles. LiFePO4 may form as the core of the particle, while the remaining materials may form a coating around the LiFePO4. Typically, the LiFePO4 is crystalline while the coating is generally amorphous, and in some instances, the coating may prevent large crystals of LiFePO4 from forming.Type: GrantFiled: January 25, 2008Date of Patent: October 29, 2013Assignee: Massachusetts Institute of TechnologyInventors: Gerbrand Ceder, ByoungWoo Kang
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Publication number: 20130273425Abstract: This invention relates generally to electrode materials, electrochemical cells employing such materials, and methods of synthesizing such materials. The electrode materials have a crystal structure with a high ratio of Li to metal M, which is found to improve capacity by enabling the transfer of a greater amount of lithium per metal, and which is also found to improve stability by retaining a sufficient amount of lithium after charging. Furthermore, synthesis techniques are presented which result in improved charge and discharge capacities and reduced particle sizes of the electrode materials.Type: ApplicationFiled: March 18, 2013Publication date: October 17, 2013Inventors: Gerbrand Ceder, Anubhav Jain, Geoffroy Hautier, Jae Chul Kim, Byoungwoo Kang, Robert Daniel
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Publication number: 20130099174Abstract: The present invention generally relates to certain lithium materials, including lithium manganese borate materials. Such materials are of interest in various applications such as energy storage. Certain aspects of the invention are directed to lithium manganese borate materials, for example, having the formula LixMny(BO3). In some cases, the lithium manganese borate materials may include other elements, such as iron, magnesium, copper, zinc, calcium, etc. The lithium manganese borate materials, according to one set of embodiments, may be present as a monoclinic crystal system. Such materials may surprisingly exhibit relatively high energy storage capacities, for example, at least about 96 mA h/g. Other aspects of the invention relate to devices comprising such materials, methods of making such materials, kits for making such materials, methods of promoting the making or use of such materials, and the like.Type: ApplicationFiled: May 5, 2011Publication date: April 25, 2013Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: Gerbrand Ceder, Jae Chul Kim, ByoungWoo Kang, Charles J. Moore, Geoffroy Hautier
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Publication number: 20130089486Abstract: The present invention generally relates to carbophosphates and other compounds. Such compounds may be used in batteries and other electrochemical devices, or in other applications such as those described herein. One aspect of the invention is generally directed to carbophosphate compounds, i.e., compounds containing carbonate and phosphate ions. For example, according to one set of embodiments, the compound has a formula Ax(M)(PO4)a(CO3)b, where M comprises one or more cations. A may include one or more alkali metals, for example, lithium and/or sodium. In some cases, x is greater than about 0.1, a is between about 0.1 and about 5.1, and b is between about 0.1 and about 5.1. In certain embodiments, the compound may have a unit cell atomic arrangement that is isostructural to to unit cells of the minerals sidorenkite, bonshtedtite, bradleyite, crawfordite, or ferrotychite.Type: ApplicationFiled: February 22, 2011Publication date: April 11, 2013Applicant: Massachusetts Institute of TechnologyInventors: Gerbrand Ceder, Hailong Chen, Robert E. Doe, Geoffrey Hautier, Anubhav Jain, ByoungWoo Kang
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Patent number: 8399130Abstract: This invention relates generally to electrode materials, electrochemical cells employing such materials, and methods of synthesizing such materials. The electrode materials have a crystal structure with a high ratio of Li to metal M, which is found to improve capacity by enabling the transfer of a greater amount of lithium per metal, and which is also found to improve stability by retaining a sufficient amount of lithium after charging. Furthermore, synthesis techniques are presented which result in improved charge and discharge capacities and reduced particle sizes of the electrode materials.Type: GrantFiled: August 16, 2010Date of Patent: March 19, 2013Assignee: Massachusetts Institute of TechnologyInventors: Gerbrand Ceder, Anubhav Jain, Geoffroy Hautier, Jae Chul Kim, Byoungwoo Kang, Robert Daniel
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Publication number: 20120037844Abstract: This invention relates generally to electrode materials, electrochemical cells employing such materials, and methods of synthesizing such materials. The electrode materials have a crystal structure with a high ratio of Li to metal M, which is found to improve capacity by enabling the transfer of a greater amount of lithium per metal, and which is also found to improve stability by retaining a sufficient amount of lithium after charging. Furthermore, synthesis techniques are presented which result in improved charge and discharge capacities and reduced particle sizes of the electrode materials.Type: ApplicationFiled: August 16, 2010Publication date: February 16, 2012Inventors: Gerbrand Ceder, Anubhav Jain, Geoffroy Hautier, Jae C. Kim, Byoungwoo Kang, Robert Daniel
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Publication number: 20100163790Abstract: The present invention generally relates to unique coatings for use with energy storage particles, such as lithium oxide energy storage materials. The invention provides unique coatings for particles, unique particle/coating combinations, and unique methods for making coatings and/or coated particles. In one aspect of the invention, a particle is formed having a core and a coating. The particle may comprise a core having a material such as LiFePO4, and a coating. The particle may be formed, in some embodiments, by using a non-stoichiometric combination of salts or other precursors, and sintering the same to form particles. LiFePO4 may form as the core of the particle, while the remaining materials may form a coating around the LiFePO4. Typically, the LiFePO4 is crystalline while the coating is generally amorphous, and in some instances, the coating may prevent large crystals of LiFePO4 from forming.Type: ApplicationFiled: January 25, 2008Publication date: July 1, 2010Applicant: Massachusetts Institute of TechnologyInventors: Gerbrand Ceder, ByoungWoo Kang