Patents by Inventor Ji Hyun NAM
Ji Hyun NAM 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: 20240174855Abstract: Provided is a biodegradable polyester polymer comprising a polymerization reaction product of an aliphatic dicarboxylic acid, an C6-30 aromatic dicarboxylic acid, an aliphatic diol, and a branching agent, and wherein the biodegradable polyester polymer has a ratio of z-average molecular weight (Mz) to weight average molecular weight (Mw) (“Mz/Mw”) greater than 2 and an easy-tear film including the same. The biodegradable film has excellent mechanical properties to effectively protect a product inside the packaging but also be easily opened in a controlled manner without excessive force and at the same time, provide an environmentally-friendly alternative to non-degradable plastics.Type: ApplicationFiled: June 8, 2023Publication date: May 30, 2024Inventors: Jeong Sun KIM, Su Jin IM, Sung Won LEE, Ki Yup KIM, Do Young KIM, Joo Hyun NAM, Ji Hae PARK
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Publication number: 20240145301Abstract: Disclosed are a metal thin film precursor composition, a method of forming a thin film using the metal thin film precursor composition, and a semiconductor substrate fabricated using the method. The metal thin film precursor composition includes a metal thin film precursor compound and a growth regulator including a predetermined terminal group and structure. In a thin film deposition process, by using the metal thin film precursor composition, side reactions may be suppressed and thin film growth rate may be controlled appropriately. Since process by-products in a thin film are removed, even when the thin film is formed on a substrate having a complicated structure, step coverage and the thickness uniformity and resistivity characteristics of the thin film may be greatly improved. In addition, corrosion or deterioration may be prevented, and the crystallinity of the thin film may be improved, thereby improving the electrical properties of the thin film.Type: ApplicationFiled: March 4, 2022Publication date: May 2, 2024Inventors: Chang Bong YEON, Jae Sun JUNG, Ji Hyun NAM
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Publication number: 20240136175Abstract: The present invention relates to an auxiliary precursor, a thin film precursor composition, a method of forming a thin film using the thin film precursor composition, and a semiconductor substrate fabricated using the method. The present invention provides the thin film precursor composition including a thin film precursor compound and a compound having a predetermined structure that exhibits reaction stability as the auxiliary precursor. By using the thin film precursor composition in a thin film deposition process, side reactions may be suppressed, and thin film growth rate may be appropriately controlled. In addition, since process by-products are removed from a thin film, even when a thin film is formed on a substrate having a complicated structure, step coverage and the thickness uniformity and resistivity characteristics of the thin film may be greatly improved.Type: ApplicationFiled: February 22, 2022Publication date: April 25, 2024Inventors: Jae Sun JUNG, Chang Bong YEON, Seung Hyun LEE, Ji Hyun NAM, Sung Woo CHO
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Patent number: 11677065Abstract: The present invention relates to a cathode active material for a lithium secondary battery, and more particularly, to a cathode active material for a lithium secondary battery, which includes a core portion and a shell portion surrounding the core portion, in which a total content of cobalt in the core portion and the shell portion is 5 to 12 mol %, and the content of cobalt in the core portion and the shell portion is adjusted to be within a predetermined range. In the cathode active material precursor and the cathode active material for a secondary battery prepared using the same according to the present invention, optimal capacity of a lithium secondary battery may be increased by adjusting the cobalt content in the particles of the cathode active material, and life characteristics may be enhanced by improving stability.Type: GrantFiled: January 11, 2022Date of Patent: June 13, 2023Assignee: ECOPRO BM CO., LTD.Inventors: Sung Jin Jang, Moon Ho Choi, Jun Won Suh, Jung Han Lee, Ji Hyun Nam, Seung Woo Choi
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Publication number: 20220140315Abstract: The present invention relates to a cathode active material for a lithium secondary battery, and more particularly, to a cathode active material for a lithium secondary battery, which includes a core portion and a shell portion surrounding the core portion, in which a total content of cobalt in the core portion and the shell portion is 5 to 12 mol %, and the content of cobalt in the core portion and the shell portion is adjusted to be within a predetermined range. In the cathode active material precursor and the cathode active material for a secondary battery prepared using the same according to the present invention, optimal capacity of a lithium secondary battery may be increased by adjusting the cobalt content in the particles of the cathode active material, and life characteristics may be enhanced by improving stability.Type: ApplicationFiled: January 11, 2022Publication date: May 5, 2022Inventors: Sung Jin JANG, Moon Ho CHOI, Jun Won SUH, Jung Han LEE, Ji Hyun NAM, Seung Woo CHOI
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Patent number: 11258055Abstract: The present invention relates to a cathode active material for a lithium secondary battery, and more particularly, to a cathode active material for a lithium secondary battery, which includes a core portion and a shell portion surrounding the core portion, in which a total content of cobalt in the core portion and the shell portion is 5 to 12 mol %, and the content of cobalt in the core portion and the shell portion is adjusted to be within a predetermined range. In the cathode active material precursor and the cathode active material for a secondary battery prepared using the same according to the present invention, optimal capacity of a lithium secondary battery may be increased by adjusting the cobalt content in the particles of the cathode active material, and life characteristics may be enhanced by improving stability.Type: GrantFiled: November 21, 2018Date of Patent: February 22, 2022Assignee: ECOPRO BM CO., LTD.Inventors: Sung Jin Jang, Moon Ho Choi, Jun Won Suh, Jung Han Lee, Ji Hyun Nam, Seung Woo Choi
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Patent number: 11063250Abstract: The present invention relates to a cathode active material composition for a lithium secondary battery and a lithium secondary battery including the same, and more particularly, to a cathode active material composition for a lithium secondary battery, including a mixture of particles which are different in Ni composition and size and prepared at the same heat treatment temperature, and a lithium secondary battery including the same. According to the present invention, optimal capacity manifestation temperatures of a coarse particle and a fine particle may be adjusted to be similar by adjusting an Ni content of the coarse particle and the fine particle, and thus, a lithium secondary battery having enhanced output and lifetime may be manufactured.Type: GrantFiled: November 15, 2018Date of Patent: July 13, 2021Assignee: ECOPRO BM CO., LTD.Inventors: Moon Ho Choi, Jun Won Suh, Jung Han Lee, Ji Hyun Nam, Sung Jin Jang, Seung Woo Choi
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Patent number: 10991938Abstract: The present invention relates to a lithium complex oxide, and more specifically, to a lithium complex oxide of which a range of FWHM(104) values maintains a constant relationship with a molar fraction of nickel when measuring XRD defined by a hexagonal lattice having a R-3m space group. The lithium complex oxide according to the present invention exhibits an effect of improving lifetime properties of the cells including high Ni-based cathode active materials accordingly by enabling a range of the FWHM(104) values at (104) peaks defined b the hexagonal lattice having the R-3m space group to maintain a constant relationship with the molar fraction of nickel, thereby maintaining the primary particles in a predetermined size range.Type: GrantFiled: August 20, 2018Date of Patent: April 27, 2021Assignee: ECOPRO BM CO., LTD.Inventors: Jung Han Lee, Moon Ho Choi, Jun Won Suh, Sung Jin Jang, Ji Hyun Nam, Seung Woo Choi
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Patent number: 10476291Abstract: Provided is a wearable device having a flexible battery, and the wearable device includes: a functional unit; a band unit that fixes the functional unit to a wrist of a user; and a thin plate flexible battery that is embedded in the band unit and supplies power to the functional unit.Type: GrantFiled: December 29, 2014Date of Patent: November 12, 2019Assignee: AMOGREENTECH CO., LTD.Inventors: Seung Yun Rho, Won Gil Choi, Ji Hyun Nam
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Publication number: 20190334163Abstract: The present invention relates to a lithium complex oxide, and more specifically, to a lithium complex oxide of which a range of FWHM(104) values maintains a constant relationship with a molar fraction of nickel when measuring XRD defined by a hexagonal lattice having a R-3m space group. The lithium complex oxide according to the present invention exhibits an effect of improving lifetime properties of the cells including high Ni-based cathode active materials accordingly by enabling a range of the FWHM(104) values at (104) peaks defined by the hexagonal lattice having the R-3m space group to maintain a constant relationship with the molar fraction of nickel, thereby maintaining the primary particles in a predetermined size range.Type: ApplicationFiled: August 20, 2018Publication date: October 31, 2019Inventors: JUNG HAN LEE, MOON HO CHOI, JUN WON SUH, SUNG JIN JANG, JI HYUN NAM, SEUNG WOO CHOI
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Publication number: 20190157660Abstract: The present invention relates to a cathode active material for a lithium secondary battery, and more particularly, to a cathode active material for a lithium secondary battery, which includes a core portion and a shell portion surrounding the core portion, in which a total content of cobalt in the core portion and the shell portion is 5 to 12 mol %, and the content of cobalt in the core portion and the shell portion is adjusted to be within a predetermined range. In the cathode active material precursor and the cathode active material for a secondary battery prepared using the same according to the present invention, optimal capacity of a lithium secondary battery may be increased by adjusting the cobalt content in the particles of the cathode active material, and life characteristics may be enhanced by improving stability.Type: ApplicationFiled: November 21, 2018Publication date: May 23, 2019Inventors: Sung Jin Jang, Moon Ho Choi, Jun Won Suh, Jung Han Lee, Ji Hyun Nam, Seung Woo Choi
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Publication number: 20190148717Abstract: The present invention relates to a cathode active material composition for a lithium secondary battery and a lithium secondary battery including the same, and more particularly, to a cathode active material composition for a lithium secondary battery, including a mixture of particles which are different in Ni composition and size and prepared at the same heat treatment temperature, and a lithium secondary battery including the same. According to the present invention, optimal capacity manifestation temperatures of a coarse particle and a fine particle may be adjusted to be similar by adjusting an Ni content of the coarse particle and the fine particle, and thus, a lithium secondary battery having enhanced output and lifetime may be manufactured.Type: ApplicationFiled: November 15, 2018Publication date: May 16, 2019Inventors: MOON HO CHOI, JUN WON SUH, JUNG HAN LEE, JI HYUN NAM, SUNG JIN JANG, SEUNG WOO CHOI
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Publication number: 20170005504Abstract: Provided is a wearable device having a flexible battery, and the wearable device includes: a functional unit; a band unit that fixes the functional unit to a wrist of a user; and a thin plate flexible battery that is embedded in the band unit and supplies power to the functional unit.Type: ApplicationFiled: December 29, 2014Publication date: January 5, 2017Inventors: Seung Yun RHO, Won Gil CHOI, Ji Hyun NAM