Patents by Inventor Su Hyeon Ji
Su Hyeon Ji 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: 20240154165Abstract: An electrolyte additive comprising a compound represented by Formula 1 below forms a coating film on an electrode surface in the activation of a secondary battery, thereby the generation of a large amount of gas under a high temperature condition can be prevented, and a cell OCV drop and a decrease in capacity retention rate, which are caused by elution of metal ions from an electrode, can be effectively prevented, resulting in effective improvement in durability, performance and high-temperature safety of the battery, wherein R1, R2, and M are described herein.Type: ApplicationFiled: October 21, 2022Publication date: May 9, 2024Applicant: LG Energy Solution, Ltd.Inventors: You Kyeong Jeong, Kyoung Ho Ahn, Jun Hyeok Han, Won Kyung Shin, Won Tae Lee, Su Hyeon Ji, Young Ho Oh
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Publication number: 20240136579Abstract: Disclosed herein relates to an electrolyte composition and a lithium secondary battery including the same, wherein the electrolyte composition can not only effectively reduce gas generated during charging and discharging of the lithium secondary battery by including one or more electrolyte additives of a chemical compound represented by Formula 1 or a chemical compound represented by Formula 2, but also has the advantage of strengthening the SEI layer on the electrode surface, thereby improving the storage characteristics and life characteristics at high temperatures.Type: ApplicationFiled: January 30, 2023Publication date: April 25, 2024Applicant: LG ENERGY SOLUTION, LTD.Inventors: Su Hyeon JI, Chul Haeng LEE, Kyoung Ho AHN, Jun Hyeok HAN, Won Kyung SHIN, Won Tae LEE
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Publication number: 20240113334Abstract: An electrolyte composition with improved high temperature safety and a lithium secondary battery including the same is described herein. The electrolyte composition containing a primary additive comprising a compound represented by Formula 1, and specific amount of a secondary additive that contains one or more of cyclic carbonates, can not only reduce the generation of gas during secondary battery charge-discharge, but also improve storage characteristics and the lifespan characteristics under a high temperature condition by strengthening the SEI coating film on the surface of an electrode. wherein all the variables are described herein.Type: ApplicationFiled: October 21, 2022Publication date: April 4, 2024Applicant: LG Energy Solution, Ltd.Inventors: Won Tae Lee, Kyoung Ho Ahn, Chul Haeng Lee, Jun Hyeok Han, Won Kyung Shin, Su Hyeon Ji, Young Ho Oh
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Publication number: 20240088440Abstract: A lithium secondary battery includes a negative electrode, a positive electrode positioned opposite to the negative electrode, a separator disposed between the negative electrode and the positive electrode, and a non-aqueous electrolyte, wherein the negative electrode includes a silicon-based active material, the silicon-based active material comprises a compound represented by SiOx, wherein 0?x<2, the non-aqueous electrolyte includes a lithium salt, an organic solvent, and an additive, the additive includes a first additive and a second additive, the first additive includes a coumarin-based compound represented by Formula 1, and the second additive includes at least one of lithium fluoromalonato(difluoro)borate (LiFMDFB), lithium difluoro(oxalato)borate (LiDFOB), lithium difluorophosphate (LiDFP), or lithium difluorobis-(oxalate)phosphate (LiDFOP): wherein R and n are described herein.Type: ApplicationFiled: August 17, 2023Publication date: March 14, 2024Applicant: LG Energy Solution, Ltd.Inventors: Yoon Gyo Cho, Chul Haeng Lee, Kyung Mi Lee, Jung Min Lee, Eun Bee Kim, Su Hyeon Ji, Chul Eun Yeom, Jung Gu Han
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Publication number: 20240047743Abstract: A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same. Specifically, the non-aqueous electrolyte solution for a lithium secondary battery of the present disclosure may include a lithium salt; a non-aqueous organic solvent; and an oligomer including a repeating unit derived from a monomer represented by Formula 1, a repeating unit derived from a monomer represented by Formula 2, and a repeating unit derived from a monomer represented by Formula 3. Also, the lithium secondary battery of the present disclosure may improve cycle characteristics and high-temperature storage characteristics by including the above non-aqueous electrolyte solution for a lithium secondary battery.Type: ApplicationFiled: September 7, 2022Publication date: February 8, 2024Applicant: LG ENERGY SOLUTION, LTD.Inventors: Jun Hyeok HAN, Kyoung Ho AHN, Min Jung KIM, Won Tae LEE, Su Hyeon JI, Chul Haeng LEE
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Publication number: 20230420737Abstract: The present invention relates to a precursor composition for preparing a polymer electrolyte, and a polymer electrolyte and a secondary battery which are prepared by using the same. The precursor composition for preparing a polymer electrolyte of the present invention includes a lithium salt, a non-aqueous organic solvent, a polymerization initiator, an oligomer represented by Formula 1, and a compound represented by Formula 2, wherein the oligomer represented by Formula 1 and the compound represented by Formula 2 may be included in a weight ratio of 1:0.01 to 1:4.Type: ApplicationFiled: December 3, 2021Publication date: December 28, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventors: Won Kyung SHIN, Chul Haeng LEE, Kyoung Ho AHN, Sol Ji PARK, Jun Hyeok HAN, Su Hyeon JI
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Publication number: 20230395848Abstract: The present invention relates to an electrolyte composition including a lithium salt; a non-aqueous organic solvent; a compound represented by a specific formula; and a perfluoropolyether oligomer, a gel polymer electrolyte including a polymer network which is formed by a polymerization reaction of the electrolyte composition, and a lithium secondary battery including the same.Type: ApplicationFiled: July 14, 2022Publication date: December 7, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventors: Won Kyung SHIN, Kyoung Ho AHN, Jun Hyeok HAN, Su Hyeon JI, Chul Haeng LEE, Min Jung KIM, Won Tae LEE, Young Ho OH, You Kyeong JEONG
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Publication number: 20230361344Abstract: The present disclosure provides a non-aqueous electrolyte solution for a lithium secondary battery, which may form a robust solid electrolyte interphase (SEI), and a lithium secondary battery in which battery performance is improved by including the same. Specifically, the non-aqueous electrolyte solution for a secondary battery includes a lithium salt, a non-aqueous organic solvent, a first additive, and a second additive, wherein the non-aqueous electrolyte solution for a secondary battery may include an oligomer including a repeating unit derived from a monomer represented by Formula 1 and a repeating unit derived from a monomer represented by Formula 2 as the first additive, and may include at least one selected from the group consisting of a nitrile-based compound, a lithium salt compound, and a cyclic carbonate compound as the second additive.Type: ApplicationFiled: January 28, 2022Publication date: November 9, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventors: Su Hyeon JI, Chul Haeng LEE, Kyoung Ho AHN, Min Jung KIM, Sol Ji PARK, Jun Hyeok HAN, Won Kyung SHIN, Won Tae LEE
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Publication number: 20230335791Abstract: The present invention relates to a composition for an electrolyte of a lithium secondary battery, a gel polymer electrolyte including a polymerization product thereof, and a lithium secondary battery including the gel polymer electrolyte, the composition including a lithium salt, a polyalkylene carbonate-based first polymer having a weight average molecular weight of 1,000 g/mol to 1,500,000 g/mol, a polypropylene carbonate-based second polymer including a unit represented by Formula 2 and having a weight average molecular weight of 200 g/mol to 1,000 g/mol, and an organic solvent, wherein the weight average molecular weight of the second polymer is in a range of 1/3,000 to ? of the weight average molecular weight of the first polymer, and the amount of the first polymer is in a range of 0.1 wt % to 30 wt % based on the total weight of the composition.Type: ApplicationFiled: December 24, 2021Publication date: October 19, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventors: Won Kyung SHIN, Chul Haeng LEE, Kyoung Ho AHN, Min Jung KIM, Won Tae LEE, Su Hyeon JI
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Publication number: 20230335792Abstract: The present invention relates to a composition for an electrolyte of a lithium secondary battery, a gel polymer electrolyte including a polymerization product thereof, and a lithium secondary battery including the gel polymer electrolyte, the composition including a lithium salt, a polyalkylene carbonate-based first polymer having a weight average molecular weight of 1,000 g/mol to 1,500,000 g/mol, a polyethylene oxide-based second polymer having a weight average molecular weight of 200 g/mol to 2,000 g/mol, and an organic solvent, wherein the weight average molecular weight of the second polymer is in a range of 1/3,000 to ? of the weight average molecular weight of the first polymer, and the amount of the first polymer is in a range of 0.1 wt % to 30 wt % based on the total weight of the composition.Type: ApplicationFiled: December 24, 2021Publication date: October 19, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventors: Won Kyung SHIN, Chul Haeng LEE, Kyoung Ho AHN, Min Jung KIM, Won Tae LEE, Su Hyeon JI
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Publication number: 20230299343Abstract: The present invention relates to a composition for an electrolyte of a lithium secondary battery, a gel polymer electrolyte including a polymerization product thereof, and a lithium secondary battery including the gel polymer electrolyte, the composition including a lithium salt, a polyalkylene carbonate-based polymer including a unit represented by Formula 1 below and having a weight average molecular weight of 1,000 g/mol to 1,500,000 g/mol, and an organic solvent, wherein the composition either includes lithium difluoro(oxalato)borate and lithium bis(oxalato)borate at a weight ratio of 1:5 to 5:1, or includes a compound represented by Formula 3-1 in an amount of 0.01 wt % to 5 wt % and a compound represented by Formula 3-2 in an amount of 0.01 wt % to 10 wt % based on the total weight of the composition.Type: ApplicationFiled: December 24, 2021Publication date: September 21, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventors: Won Kyung SHIN, Chul Haeng LEE, Kyoung Ho AHN, Min Jung KIM, Sol Ji PARK, Jun Hyeok HAN, Won Tae LEE, Su Hyeon JI
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Publication number: 20230299351Abstract: A lithium secondary battery includes Li6CoO4 containing excess lithium, or the like as an irreversible additive in a positive electrode, and at the same time, includes an electrolyte additive of Formula 1 having a specific molecular weight in an electrolyte to realize low battery resistance and effectively prevent metal ions from being exsolved from the irreversible additive, and thus has advantages of excellent battery performance and lifespan, wherein R1 to R5, p, q, r, m and n are described herein.Type: ApplicationFiled: February 23, 2023Publication date: September 21, 2023Applicant: LG Energy Solution, Ltd.Inventors: Jun Hyeok Han, Su Hyeon Ji, Chul Haeng Lee, Kyoung Ho Ahn, Won Kyung Shin, Won Tae Lee, Young Ho Oh, You Kyeong Jeong
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Publication number: 20230299352Abstract: The present technology relates to a lithium secondary battery. The lithium secondary battery has advantages of excellent high-rate discharge characteristics at room temperature as well as excellent discharge efficiency at low temperature when a coating layer containing specific contents of a lithium element, a sulfur element, and a nitrogen element is provided on a positive electrode mixture layer including a positive electrode active material.Type: ApplicationFiled: February 27, 2023Publication date: September 21, 2023Applicant: LG Energy Solution, Ltd.Inventors: You Kyeong Jeong, Kyoung Ho Ahn, Jun Hyeok Han, Won Kyung Shin, Won Tae Lee, Su Hyeon Ji, Young Ho Oh
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Publication number: 20230299360Abstract: The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery, which includes an oligomer represented by Formula 1, a lithium salt, and an organic solvent, and a lithium secondary battery including the same.Type: ApplicationFiled: January 11, 2022Publication date: September 21, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventors: Jun Hyeok HAN, Chul Haeng LEE, Kyoung Ho AHN, Sol Ji PARK, Won Kyung SHIN, Su Hyeon JI
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Publication number: 20230299350Abstract: A lithium secondary battery has excellent economic feasibility and safety because an iron phosphate of Formula 2 having an olivine structure is included as a positive electrode active material, and also has advantages of excellent battery performance and lifespan because an electrolyte additive of Formula 1 having a specific molecular weight is included in an electrolyte to improve an increase in internal resistance of the battery during charging and discharging and effectively prevent iron ions from being exsolved from the positive electrode active material, wherein R1to R5, p, q, r, m and n are described herein.Type: ApplicationFiled: February 22, 2023Publication date: September 21, 2023Applicant: LG Energy Solution, Ltd.Inventors: Jun Hyeok Han, Su Hyeon Ji, Chul Haeng Lee, Kyoung Ho Ahn, Won Kyung Shin, Won Tae Lee, Young Ho Oh, You Kyeong Jeong
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Publication number: 20230253623Abstract: The present disclosure relates to a lithium secondary battery comprising a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and a non-aqueous electrolyte. The non-aqueous electrolyte includes an organic solvent, a lithium salt, a coumarin-based compound represented by [Chemical Formula 1], and a halogen-substituted cyclic carbonate, and the positive electrode active material includes a lithium manganese-rich oxide represented by [Chemical Formula 2].Type: ApplicationFiled: February 3, 2023Publication date: August 10, 2023Applicant: LG Energy Solution, Ltd.Inventors: Jung Min Lee, Jung Gu Han, Su Hyeon Ji, Chul Eun Yeom, Chul Haeng Lee, Kyung Mi Lee
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Publication number: 20230253624Abstract: The present disclosure relates to a non-aqueous electrolyte including an organic solvent, a lithium salt, and a coumarin-based compound represented by the following Chemical Formula 1 and a lithium secondary battery including the non-aqueous electrolyte: in Chemical Formula 1, R is a substituent including one or more elements selected from the group consisting of C, O, N, B, S, P, Si, and F, and n is an integer of 1 to 6.Type: ApplicationFiled: February 3, 2023Publication date: August 10, 2023Applicant: LG Energy Solution, Ltd.Inventors: Jung Min Lee, Jung Gu Han, Su Hyeon Ji, Chul Eun Yeom, Chul Haeng Lee, Kyung Mi Lee
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Publication number: 20230207878Abstract: An electrolyte composition and a lithium secondary battery including the same are disclose herein. The electrolyte composition has improved high temperature safety. In some embodiments, the electrolyte composition includes an additive including a compound represented by Formula 1. Each R1 is independently a single bond, an alkylene group having 1 to 10 carbon atoms, or each R2 is independently a double or triple bond including 2 carbon atoms, each R3 is independently hydrogen or an alkyl group having 1 to 4 carbon atoms, and a is an integer of 1 to 10. The additive may reinforce an SEI layer on the surface of an electrode, thereby having advantages of improved storage and lifetime characteristics at a high temperature and a decreased amount of gas generated in the battery.Type: ApplicationFiled: December 13, 2022Publication date: June 29, 2023Applicant: LG Energy Solution, Ltd.Inventors: Kyoung Ho Ahn, Won Tae Lee, Jun Hyeok Han, Su Hyeon Ji, Chul Haeng Lee, Won Kyung Shin, Young Ho Oh, You Kyeong Jeong
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Publication number: 20230155176Abstract: An additive for a non-aqueous electrolyte, a non-aqueous electrolyte including the same, and a lithium secondary battery including the same are disclosed herein. The additive includes an ionic compound to form a coating film on an electrode surface, thereby preventing gas generation at high temperature, a cell open-circuit voltage (OCV) drop, and a decrease in capacity retention rate, which are caused by elution of metal ions from an electrode. The additive improves durability, performance, and high temperature safety of the battery.Type: ApplicationFiled: November 9, 2022Publication date: May 18, 2023Applicant: LG Energy Solution, Ltd.Inventors: You Kyeong Jeong, Kyoung Ho Ahn, Junhyeok Han, Won-Kyung Shin, Wontae Lee, Su Hyeon Ji, Youngho Oh
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Publication number: 20230155177Abstract: A lithium secondary battery is disclosed herein. The secondary battery has improved high temperature safety and may prevent generation of a large amount of gas under a high temperature condition, which prevents an increase in resistance and a decrease in capacity due to the elution of metal ions from an electrode by uniformly forming a coating film on an electrode surface during activation of the battery. A positive electrode active material of the battery includes a high concentration(s) of nickel and/or manganese and a non-aqueous electrolyte including an additive are used, which improves performance and high-temperature safety of the battery.Type: ApplicationFiled: November 9, 2022Publication date: May 18, 2023Applicant: LG Energy Solution, Ltd.Inventors: Wontae Lee, Kyoung Ho Ahn, Chul Haeng Lee, Junhyeok Han, Won-Kyung Shin, Su Hyeon Ji, Youngho Oh