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    Method of fabricating LiFePO4 cathode electroactive material by recycling, and LiFePO4 cathode electroactive material, LiFePO4 cathode, and lithium secondary battery fabricated thereby
    2.
    发明授权
    Method of fabricating LiFePO4 cathode electroactive material by recycling, and LiFePO4 cathode electroactive material, LiFePO4 cathode, and lithium secondary battery fabricated thereby 有权
    通过再循环制造LiFePO4阴极电活性材料的方法，制备LiFePO4阴极电活性材料，LiFePO 4阴极和锂二次电池

    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。

    Sodium vanadium oxide anode material for sodium ion secondary battery, preparation method thereof and sodium ion secondary battery having the same
    3.
    发明授权
    Sodium vanadium oxide anode material for sodium ion secondary battery, preparation method thereof and sodium ion secondary battery having the same 有权
    用于钠离子二次电池的钠钒氧化物阳极材料及其制备方法和具有其的钠离子二次电池

    公开(公告)号：US09166225B2

    公开(公告)日：2015-10-20

    申请号：US13966497

    申请日：2013-08-14

    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

    Inventor： Hyung Sun Kim ,  Byung Won Cho ,  Si Hyoung Oh ,  Ju Hyeon Ahn ,  Yong Ho Lee ,  Won Chang Choi

    IPC: H01M4/485 ,  C01D1/02 ,  H01M4/02 ,  C01G31/02 ,  H01M10/054

    CPC classification number: H01M4/485 ,  C01D1/02 ,  C01G31/02 ,  H01M10/054 ,  H01M2004/027 ,  Y02E60/122

    Abstract: There is provided a preparation method of a sodium vanadium oxide-based (Na1+xV1−xO2) anode material for a sodium ion secondary battery synthesized by mixing particles of precursors such as sodium carbonate (Na2CO3) and vanadium oxide (V2O3) and pyrolyzing a mixture in a mixed gas atmosphere composed of 90 mol % of nitrogen gas and 10 mol % of hydrogen gas through a solid-state reaction. The sodium vanadium oxide-based anode material prepared according to the present invention shows a small change in volume caused by an initial irreversible capacity and continuous charge/discharge reactions, and thus it is useful for providing a next-generation sodium ion secondary battery having stable charge/discharge characteristics and cycle performance.

    Abstract translation: 提供了通过混合前体如碳酸钠（Na 2 CO 3）和氧化钒（V 2 O 3）的颗粒合成的钠离子二次电池的钠钒氧化物（Na1 + xV1-xO2）阳极材料的制备方法，并将 通过固相反应在由90mol％的氮气和10mol％的氢气组成的混合气体气氛中进行混合。 根据本发明制备的基于氧化钒的阳极材料显示由初始不可逆容量和连续充放电反应引起的体积变化小，因此可用于提供具有稳定的下一代钠离子二次电池 充放电特性和循环性能。

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