公开(公告)号：US11777136B2

公开(公告)日：2023-10-03

申请号：US16725656

申请日：2019-12-23

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Kyung Yoon Chung ,  Dong Hyun Kim ,  Juhyeon Ahn ,  Jaeho Park ,  Ji-Young Kim ,  Min Kyung Cho ,  Byung Won Cho ,  Hun-Gi Jung ,  Minah Lee ,  Seungho Yu ,  Hyungseok Kim

IPC: H01M10/054 ,  H01M4/04 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/525 ,  H01M10/0569

CPC classification number: H01M10/054 ,  H01M4/0445 ,  H01M4/0459 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0569

Abstract: Disclosed is a method of preparing a cathode active material useful in a sodium ion secondary battery having high reversible capacity and excellent cycle characteristics. The method for preparing a cathode active material composed of Zrw-doped NaxLiyMzOa includes the steps of (A) doping LiyMzOa with Zrw to provide Zrw-doped LiyMzOa; and (B) dissociating Li ion from the Zrw-doped LiyMzOa and inserting Na ion thereto to provide the Zrw-doped NaxLiyMzOa, wherein M is selected from Ti, V, Cr, Mn, Fe, Co, Ni, Mo, Ru, and combinations thereof, and wherein 0.005

公开(公告)号：US10403886B2

公开(公告)日：2019-09-03

申请号：US15396752

申请日：2017-01-02

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Kyung Yoon Chung ,  Ji-Hoon Lee ,  Ghulam Ali ,  Hun-Gi Jung ,  Wonchang Choi ,  Won Young Chang ,  Si Hyoung Oh ,  Byung Won Cho

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/58 ,  H01M4/587 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/62 ,  H01M10/054 ,  H01M4/02

Abstract: Disclosed is an anode material for a sodium secondary battery. The anode material includes a tin fluoride-carbon composite composed of a tin fluoride and a carbonaceous material. The anode material can be used to improve the charge/discharge capacity, charge/discharge efficiency, and electrochemical activity of a sodium secondary battery. Also provided are a method for preparing the anode material and a sodium secondary battery including the anode material.

公开(公告)号：US09199850B2

公开(公告)日：2015-12-01

申请号：US13651765

申请日：2012-10-15

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyung Sun Kim ,  Byung Won Cho ,  Hwa Young Lee ,  Su Jin Kim ,  Eun Jung Shin ,  Kyung Yoon Chung

IPC: C01B25/00 ,  C01B25/37 ,  C01B25/45 ,  H01M4/1397 ,  H01M4/58 ,  H01B1/12 ,  H01M4/02 ,  H01M4/04 ,  H01M4/62

CPC classification number: C01B25/375 ,  C01B25/45 ,  H01M4/0471 ,  H01M4/1397 ,  H01M4/5825 ,  H01M4/625 ,  Y02E60/122

Abstract: The present invention relates to a method for fabricating a LiFePO4 cathode electroactive material for a lithium secondary battery by recycling, and a LiFePO4 cathode electroactive material for a lithium secondary battery, a LiFePO4 cathode, and a lithium secondary battery fabricated thereby. The present invention is characterized in that a cathode scrap is heat treated in air for a cathode electroactive material to be easily dissolved in an acidic solution, and amorphous FePO4 obtained as precipitate is heat treated in an atmosphere of air or hydrogen so as to fabricate crystalline FePO4 or Fe2P2O7. According to the present invention, a cathode scrap may be recycled by using a simple, environmentally friendly, and economical method. Further, a lithium secondary battery fabricated by using a LiFePO4 cathode electroactive material from the cathode scrap is not limited in terms of performance.

Abstract translation: 本发明涉及通过再循环制造用于锂二次电池的LiFePO 4阴极电活性材料的方法，以及用于锂二次电池的LiFePO 4阴极电活性材料，LiFePO 4阴极和由此制造的锂二次电池。 本发明的特征在于，阴极废料在空气中进行热处理，以使阴极电活性物质容易地溶解在酸性溶液中，并将作为沉淀物获得的无定形FePO 4在空气或氢气气氛中进行热处理，以制造结晶 FePO4或Fe2P2O7。 根据本发明，阴极废料可以通过简单，环保且经济的方法再循环。 此外，通过使用来自阴极废料的LiFePO 4阴极电活性材料制造的锂二次电池在性能方面没有限制。

公开(公告)号：US08557202B1

公开(公告)日：2013-10-15

申请号：US13667404

申请日：2012-11-02

Applicant: Korea Institute of Science and Technology

Inventor： Hwa Young Lee ,  Byung Won Cho ,  Joong Kee Lee

IPC: C22B34/00

CPC classification number: C22B3/0063 ,  C22B34/14 ,  Y02P10/234

Abstract: A separation method of zirconium and hafnium according to an example of the present invention comprising, mixing step to prepare a crude liquid for extraction, by mixing a sulfuric acid solution including zirconium and hafnium, a catalyst, and an acidic extractant; and first extraction step to form a first extract solution layer comprising the acidic extractant in which the hafnium has been extracted and a sulfuric acid solution layer separated from the first extract solution layer, wherein the acidic extractant comprises any one selected from a group consisting of D2EHPA (Di-(2-ethylhexyl)phosphoric acid), PC88A (2-Ethylhexyl phosphonic acid mono-2-ethylhexyl ester), and a combination thereof. The separation method not only saves the amount of extractant used but also increases separation effect of zirconium and hafnium known to be difficult for separating each other, without using no toxic compound such as cyan.

Abstract translation: 根据本发明实施例的锆和铪的分离方法，包括：混合步骤，通过混合包含锆和铪的硫酸溶液，催化剂和酸性萃取剂来制备用于萃取的粗液体; 以及第一提取步骤，形成包含其中提取了铪的酸性萃取剂和从第一提取液层分离的硫酸溶液层的第一萃取溶液层，其中酸性萃取剂包含选自D2EHPA （2-（2-乙基己基）磷酸），PC88A（2-乙基己基膦酸单-2-乙基己基酯）及其组合。 分离方法不仅节省了使用的萃取剂的量，而且增加了已知难以分离的锆和铪的分离效果，而不使用无毒化合物如青色。

公开(公告)号：US09911517B2

公开(公告)日：2018-03-06

申请号：US14476907

申请日：2014-09-04

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Chang-Sam Kim ,  Sang Whan Park ,  Byung Won Cho ,  Kyoung Ran Lim

IPC: H01B1/04 ,  B01J13/00 ,  H01M4/66 ,  H01M4/96 ,  H01M4/04 ,  H01M4/80 ,  H01M10/39 ,  H01M4/1397

CPC classification number: H01B1/04 ,  B01J13/0034 ,  B01J13/0039 ,  B01J13/0047 ,  H01M4/0416 ,  H01M4/1397 ,  H01M4/663 ,  H01M4/664 ,  H01M4/667 ,  H01M4/806 ,  H01M4/96 ,  H01M10/3909 ,  H01M10/3954

Abstract: Disclosed is a carbon felt impregnated with inorganic particles. The impregnated carbon felt can be used together with sulfur in a cathode of a sodium-sulfur (Na—S) battery. Also disclosed is a method for producing the impregnated carbon felt. According to exemplary embodiments, the problem of the prior art can be solved in which inorganic particles such as alumina particles are not directly adhered to carbon felts, thus necessitating complicated processes. In addition, a slurry including an inorganic binder and alumina particles can be used to directly coat the alumina particles on the surface of a carbon felt, making the production procedure very simple. Furthermore, the use of the carbon felt surface coated with the alumina particles in a Na—S battery increases the wicking of sodium polysulfides, suppresses the accumulation of sulfur as an insulator on the surface of beta-alumina as an electrolyte, and inhibits non-uniform aggregation of sulfur or sodium polysulfides on the carbon felt, so that the concentration polarization of charges can be reduced without a significant increase in the internal resistance of the battery, achieving high utilization efficiency of sulfur as a reactant.

公开(公告)号：US09865866B2

公开(公告)日：2018-01-09

申请号：US13662994

申请日：2012-10-29

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jaehoon Kim ,  Jong Min Park ,  Kyung Yoon Chung ,  Agung Nugroho ,  Byung Won Cho

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/587 ,  H01M4/62 ,  H01M4/1391 ,  H01M10/052

CPC classification number: H01M4/366 ,  H01M4/1391 ,  H01M4/485 ,  H01M4/587 ,  H01M4/625 ,  H01M10/052

Abstract: Disclosed is a method for carbon coating on lithium titanium oxide-based anode active material nanoparticles. The method includes (a) introducing a lithium precursor solution, a titanium precursor solution and a surface modifier solution into a reactor, and reacting the solutions under supercritical fluid conditions to prepare a solution including nanoparticles of an anode active material represented by Li4Ti5O12, (b) separating the anode active material nanoparticles from the reaction solution, and (c) calcining the anode active material nanoparticles to uniformly coat the surface of the nanoparticles with carbon. Further disclosed are carbon-coated lithium titanium oxide-based anode active material nanoparticles produced by the method. In the anode active material nanoparticles, lithium ions are transferred rapidly. In addition, the uniform carbon coating ensures high electrical conductivity, allowing the anode active material nanoparticles to have excellent electrochemical properties.

公开(公告)号：US08801916B2

公开(公告)日：2014-08-12

申请号：US13670869

申请日：2012-11-07

Applicant: Korea Institute of Science and Technology

Inventor： Hwa Young Lee ,  Byung Won Cho ,  Joong Kee Lee

IPC: C25C1/08 ,  C25C3/34 ,  C25C7/00

CPC classification number: C25C1/08 ,  C23C18/1617 ,  C23C18/32

Abstract: A recovery method of nickel according to the present invention comprises pretreatment step to prepare a solution for electrolysis by adding hexanesulfonate salt to a treatment solution including nickel, and nickel recovery step to recover nickel in a metal form by electrolysis of the above solution for electrolysis. The present invention can produce nickel in high purity with simple process with low cost, and can recover and reproduce nickel in a metal form with at least 99.5% of high purity and at least 90% of recovery rate.

Abstract translation: 根据本发明的镍的回收方法包括预处理步骤，通过向包含镍的处理溶液中加入己磺酸盐制备电解溶液，以及镍回收步骤，通过电解上述电解溶液来回收金属形式的镍。 本发明可以以低成本的简单工艺生产高纯度的镍，并且可以以至少99.5％的高纯度和至少90％的回收率回收和再现金属形式的镍。