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公开(公告)号：US11367866B2
公开(公告)日：2022-06-21
申请号：US16646473
申请日：2018-10-19
发明人： Dongwook Lee , Changshin Jo , Jinwoo Lee , Kwonnam Sohn , Doo Kyung Yang , Won-Gwang Lim
摘要： Porous carbon particles, and a positive electrode active material and a lithium secondary battery including the same. This may improve the energy density of the lithium secondary battery by applying a porous electrode containing micropores and mesopores and having a uniform size distribution and shape as a positive electrode material.
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公开(公告)号：US11038174B2
公开(公告)日：2021-06-15
申请号：US16324249
申请日：2018-05-28
申请人： LG CHEM, LTD.
发明人： Suenghoon Han , Kwonnam Sohn , Doo Kyung Yang , Dongwook Lee , Jungmi Moon
摘要： A method for preparing Iron Oxide-hydroxide (FeOOH), and a positive electrode for a lithium-sulfur battery including Iron Oxide-hydroxide. In particular, the preparation of crystalline Iron Oxide-hydroxide, particularly, lepidocrocite (γ-FeOOH), by controlling a reaction time and a reaction temperature, and by using the prepared high purity Iron Oxide-hydroxide in a positive electrode of a lithium-sulfur battery, may enhance discharge capacity and lifetime properties of the battery.
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公开(公告)号：US11876227B2
公开(公告)日：2024-01-16
申请号：US17283395
申请日：2019-11-06
申请人： LG CHEM, LTD.
发明人： Minsu Kim , Kwonnam Sohn , Dongwook Lee
IPC分类号： H01M4/58 , H01M4/583 , H01M10/0525 , H01M4/02
CPC分类号： H01M4/5815 , H01M4/583 , H01M10/0525 , H01M2004/021 , H01M2004/027 , H01M2004/028
摘要： A lithium secondary battery is provided and, more specifically, a lithium secondary battery comprising a cathode catalyst including a transition metal composite having a stable structure in which four nitrogens are bonded to the transition metal as a cathode catalyst for a reduction reaction of sulfur generated during operation of the lithium secondary battery having a sulfur-containing material included in a cathode thereof, thereby improving performance and longevity of the battery.
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4.发明授权公开(公告)号：US11239465B2
公开(公告)日：2022-02-01
申请号：US16304806
申请日：2017-05-26
申请人： LG CHEM, LTD.
发明人： Dongwook Lee , Kwonnam Sohn , Doo Kyung Yang
IPC分类号： H01M4/58 , H01M4/04 , H01M4/133 , H01M4/136 , H01M4/1393 , H01M4/1397 , H01M10/0525 , H01M4/587 , H01M4/36 , H01M10/052 , H01M4/38
摘要： A sulfur-carbon composite including a carbon-based material of which surface is modified by acid treatment is provided, as well as a method for preparing the same, and a lithium-sulfur battery including the same. A sulfur-carbon composite suppresses polysulfide elution when used as a positive electrode active material of a lithium-sulfur battery by including a carbon-based material of which surface is modified to have a hydroxyl group and a carboxyl group capable of adsorbing polysulfide on the surface. Accordingly, capacity property and life time property of the battery may be enhanced. In addition, a surface of the carbon-based material can be modified using a simple process of treating with a mixed solution of nitric acid and sulfuric acid, and a content of functional groups on the surface can be controlled depending on a mixing ratio of the nitric acid and the sulfuric acid.
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公开(公告)号：US10770727B2
公开(公告)日：2020-09-08
申请号：US16308316
申请日：2017-11-28
申请人： LG CHEM, LTD.
发明人： Dongwook Lee , Jongwook Jung , Kwonnam Sohn , Doo Kyung Yang , Gyo Hyun Hwang
IPC分类号： H01M4/00 , H01M4/58 , C01B32/70 , H01M4/131 , H01M10/052 , H01M4/583 , H01M4/36 , C01B17/22 , C01B17/42 , H01M4/38 , H01M4/02
摘要： A positive electrode active material for a lithium-sulfur battery, and more particularly, to a positive electrode active material for a lithium-sulfur battery including metal sulfide nanoparticles and a preparation method thereof. The metal sulfide nanoparticles with large specific surface area applied to the positive electrode active material for the lithium-sulfur battery according to the present invention acts as a redox mediator during charging and discharging of the lithium-sulfur battery, thereby reducing the shuttle response by not only inhibiting the formation itself of polysulfides with elution properties, but also, even if polysulfides are eluted, adsorbing them and thus preventing them from diffusing into the electrolyte solution, and thus the capacity and life characteristics of the lithium-sulfur battery can be improved.
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