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    • 5. 发明授权
    • Layered structure manganese dioxide for cathode material in lithium rechargeable cell and process for producing the same
    • 锂二次电池用阴极材料的分层结构二氧化锰及其制造方法
    • US06296830B1
    • 2001-10-02
    • US09236325
    • 1999-01-25
    • Seung-Mo OhSa-Heum KimWan Mook Im
    • Seung-Mo OhSa-Heum KimWan Mook Im
    • C01G4512
    • C01G45/02C01G45/1221C01P2002/20C01P2002/54C01P2002/72C01P2002/76C01P2002/78C01P2006/40H01M4/505
    • A layered structure manganese dioxide (MnO2) of which oxide lattices are in the pattern of pseudo-hexagonal close packing ( . . . AABB . . . ) and has hexagonal P63/mmc space group or orthorhombic Cmcm space group. The present invention also provides a process for producing said layered structure manganese dioxide (MnO2) which comprises heat treating a mixture of an alkali metal compound and a manganese compound at a high temperature. During the process, bismuth compounds or lead compounds may be added in order to stabilize the layered crystal structure of MnO2, or lithium compounds may be added in order to improve the reversibility of charge and discharge. The layered structure MnO2 is suitable for use as a cathode material in lithium rechargeable cells, since it does not transform into a spinel phase during charge and discharge cycling, thus having an excellent charging and discharging reversibility.
    • 氧化物晶格呈伪六方密堆积图案(AABB ...)并具有六边形P63 / mmc空间群或正交Cmcm空间群的层状结构二氧化锰(MnO 2)。 本发明还提供了一种制备所述层状结构二氧化锰(MnO 2)的方法,其包括在高温下热处理碱金属化合物和锰化合物的混合物。 在此过程中,为了稳定MnO2的层状晶体结构,可以加入铋化合物或铅化合物,也可以添加锂化合物,以提高充放电的可逆性。 层状结构MnO 2适合用作锂可再充电电池中的阴极材料,因为它在充电和放电循环期间不会转变为尖晶石相,因此具有优异的充电和放电可逆性。
    • 9. 发明授权
    • Lithiated manganese oxide
    • 锂化锰
    • US06207129B1
    • 2001-03-27
    • US09312033
    • 1999-05-14
    • Akshaya Kumar PadhiChithambarathanu Pillai
    • Akshaya Kumar PadhiChithambarathanu Pillai
    • C01G4512
    • H01M4/505C01G45/1242C01P2002/32C01P2002/72C01P2004/51C01P2004/60C01P2004/61C01P2006/40H01M4/131H01M4/1391
    • The invention is a process which provides a high purity lithiated manganese oxide (Li1+xMn2−yO4) from chemically made MnO2. The lithiated manganese oxide has an especially effective utility for use as a cathodic material in rechargeable batteries. The process of the invention includes blending a lithium compound with a chemically made manganese dioxide to form a manganese dioxide/lithium compound blend. The lithium compound in the blend is at least about one mole of lithium for every mole of manganese dioxide. The manganese dioxide and lithium compound in the blend undergo an ion exchange reaction to provide an ion replaced product where lithium ions have replaced sodium and potassium ions in the MnO2 to form an ion replaced product. Thereafter, the ion replaced product is heated or calcined to provide the lithiated manganese oxide.
    • 本发明是从化学制造的MnO 2提供高纯度锂化锰氧化物(Li1 + xMn2-yO4)的方法。 锂二氧化锰在可再充电电池中用作阴极材料具有特别有效的用途。 本发明的方法包括将锂化合物与化学制备的二氧化锰混合以形成二氧化锰/锂化合物共混物。 混合物中的锂化合物对于每摩尔二氧化锰为至少约1摩尔的锂。 共混物中的二氧化锰和锂化合物经历离子交换反应以提供离子替代产物,其中锂离子已经在MnO 2中取代了钠和钾离子以形成离子替代产物。 此后,将离子置换产物加热或煅烧以提供锂化氧化锰。