LITHIUM TITANATE, ELECTRODE ACTIVE MATERIAL AND ELECTRICITY STORAGE DEVICE EACH COMPRISING THE SAME
    65.
    发明申请
    LITHIUM TITANATE, ELECTRODE ACTIVE MATERIAL AND ELECTRICITY STORAGE DEVICE EACH COMPRISING THE SAME 有权
    钛酸锂,电极活性材料和电储存装置,每个包含它们

    公开(公告)号:US20160009567A1

    公开(公告)日:2016-01-14

    申请号:US14812125

    申请日:2015-07-29

    Abstract: Disclosed is lithium titanate having excellent rate properties and useful for electricity storage devices, which is produced by preparing lithium titanate secondary particles that are aggregates of lithium titanate primary particles and forming at least macro-pores on the surfaces of the secondary particles. The lithium titanate can be produced by a process which comprises drying and granulating a slurry comprising crystalline titan oxide, a titanic acid compound and a lithium compound and firing the granulated product to thereby produce lithium titanate secondary particles, wherein (1) the crystalline titan oxide to be used comprises at least two types of crystalline titan oxide particles having different average particle diameters from each other, and/or (2) the crystalline titan oxide is used in an amount at least four-fold larger than that of the titanic acid compound in terms of TiO2 content by weight. The lithium titanate can achieve a satisfactory level of charge-discharge capacity for practical uses when used in a electricity storage device without requiring the use of a carbon-containing substance, such as carbon black, acethylene black or Ketjen black, as an electrically conductive material in combination, in spite of a fact that lithium titanate has an electrically insulating properties by nature.

    Abstract translation: 公开了通过制备钛酸锂一次粒子的聚集体并在二次粒子的表面上形成至少大孔的钛酸锂二次粒子制造的,具有优异的速率性能并且可用于蓄电装置的钛酸锂。 钛酸锂可以通过包括干燥和造粒包含结晶氧化钛,钛酸化合物和锂化合物的浆料并焙烧该造粒产物从而制备钛酸锂二次颗粒的方法制备,其中(1)结晶氧化钛 所使用的结晶氧化钛粒子的平均粒径至少为2种以上,和/或(2)结晶性氧化钛的使用量比钛酸化合物的至少4倍 以TiO 2重量比计。 钛酸锂在用于蓄电装置时可以实现满足实际使用的充放电能力,而不需要使用碳黑,丙烯黑或科琴黑等含碳物质作为导电材料 尽管钛酸锂本质上具有电绝缘性,但是它们组合在一起。

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