公开(公告)号：US08597830B2

公开(公告)日：2013-12-03

申请号：US13113189

申请日：2011-05-23

申请人： Takahiro Kawakami ,  Masaki Yamakaji ,  Nadine Takahashi ,  Shunpei Yamazaki

发明人： Takahiro Kawakami ,  Masaki Yamakaji ,  Nadine Takahashi ,  Shunpei Yamazaki

IPC分类号： H01M4/13

CPC分类号： H01M10/0525 ,  H01M4/5805 ,  Y02T10/7011

摘要： An object is to provide a power storage device with high discharge capacity and high energy density. The power storage device includes a positive electrode in which a positive electrode active material is formed over a positive electrode current collector; and a negative electrode which faces the positive electrode with an electrolyte interposed therebetween. The positive electrode active material includes a film-form first region which includes a compound containing lithium and nickel; and a film-form second region which includes a compound containing lithium and one or more of iron, manganese, and cobalt, but not containing nickel. The first region is covered with the second region. Since a superficial portion of the positive electrode active material does not contain nickel, nickel is not in contact with an electrolyte solution; thus, generation of a catalyst effect of nickel can be suppressed, and a high discharge potential of nickel can be utilized.

摘要翻译： 目的是提供具有高放电容量和高能量密度的蓄电装置。 蓄电装置包括在正极集电体上形成正极活性物质的正极， 以及负极，其正极与正极之间插入电解质。 正极活性物质包括含有锂和镍的化合物的膜状第一区域; 以及膜状第二区域，其包含含有锂和一种或多种铁，锰和钴但不含镍的化合物。 第一个地区覆盖着第二个地区。 由于正极活性物质的表面部分不含镍，所以镍不与电解液接触; 因此，可以抑制镍的催化剂效果的产生，并且可以利用镍的高放电电位。

公开(公告)号：US08728653B2

公开(公告)日：2014-05-20

申请号：US13045667

申请日：2011-03-11

申请人： Takahiro Kawakami ,  Nadine Takahashi ,  Masaki Yamakaji

发明人： Takahiro Kawakami ,  Nadine Takahashi ,  Masaki Yamakaji

IPC分类号： H01M4/131

CPC分类号： H01M10/0525 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525

摘要： An object is to increase the amount of ions capable of entering and leaving a positive electrode active material in an ion battery so that the capacity of the battery is increased. When a solid solution including alkali metal oxide having electrical conductivity less than or equal to 10−10 S/cm and including alkali metal with a valence of 2 or more, and alkali metal oxide having electrical conductivity greater than or equal to 1×10−6 S/cm and less than or equal to 3×10−6 S/cm is used as a positive electrode active material in an ion battery, the amount of ions capable of entering and leaving the positive electrode active material is increased, so that the capacity of the battery is increased.

摘要翻译： 目的是增加能够在离子电池中进入和离开正极活性物质的离子的量，使得电池的容量增加。 当包含导电率小于或等于10-10S / cm的碱金属氧化物并且包含2价以上的碱金属的固溶体，以及导电率大于或等于1×10 -5的碱金属氧化物时， 作为离子电池中的正极活性物质，使用6S / cm且小于等于3×10 -6 S / cm的离子，能够进出正极活性物质的离子的量增加， 电池的容量增加。

公开(公告)号：US20110075323A1

公开(公告)日：2011-03-31

申请号：US12893446

申请日：2010-09-29

申请人： Takahiro Kawakami ,  Nadine Takahashi

发明人： Takahiro Kawakami ,  Nadine Takahashi

IPC分类号： H01G9/145

CPC分类号： H01G9/155 ,  H01G9/016 ,  H01G9/058 ,  H01G11/12 ,  H01G11/28 ,  H01G11/36 ,  H01G11/70 ,  Y02E60/13

摘要： A capacitor having stable characteristics and an improved energy density while sufficiently ensuring a bonding strength between the polarizable electrode layer and the current collector is provided. A buffer layer including a ratio of 60 wt % to 90 wt %, preferably 70 wt % to 80 wt %, of carbon nanofiber or carbon nanotube, is formed over the current collector. Then, by forming a polarizable electrode layer over the aforesaid buffer layer, a pair of electrodes are obtained in which, the buffer layer and the polarizable electrode layer are stacked in this order over the current collector. Additionally, a capacitor is formed with the above-mentioned pair of electrodes by opposing the polarizable electrode layers to each other so as to be facing one another with a separator sandwiched therebetween in an electrolyte solution.

摘要翻译： 提供一种电容器，其具有稳定的特性和提高的能量密度，同时充分确保了可极化电极层和集电体之间的结合强度。 在集电体上形成包含60重量％〜90重量％，优选70重量％〜80重量％的碳纳米纤维或碳纳米管的缓冲层。 然后，通过在上述缓冲层上形成可极化电极层，得到一对电极，其中缓冲层和可极化电极层依次层叠在集电体上。 另外，通过使可极化电极层彼此相对地彼此面对，并且在电解液中夹有隔板，形成有上述一对电极的电容器。