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    Metal/Non-Metal Co-Doped Lithium Titanate Spheres with Hierarchical Micro/Nano Architectures for High Rate Lithium Ion Batteries
    1.
    发明申请
    Metal/Non-Metal Co-Doped Lithium Titanate Spheres with Hierarchical Micro/Nano Architectures for High Rate Lithium Ion Batteries 有权
    用于高速率锂离子电池的分级微/纳米结构的金属/非金属共掺钛酸锂球

    公开(公告)号：US20140342228A1

    公开(公告)日：2014-11-20

    申请号：US14250369

    申请日：2014-04-10

    Applicant: Nano and Advanced Materials Institute Limited

    Inventor： Chenmin LIU ,  Lifeng CAI ,  Shing Yan CHOI

    IPC: H01M4/36

    CPC classification number: H01M4/366 ,  C01G23/005 ,  H01M4/485 ,  H01M10/0525 ,  H01M2004/027

    Abstract: The present invention is to provide a lithium titanate (LTO) material for a lithium ion battery. The LTO material has hierarchical micro/nano architecture, and comprises a plurality of micron-sized secondary LTO spheres, and a plurality of pores incorporated with metal formed by a metal dopant. Each of the micron-sized secondary LTO spheres comprises a plurality of nano-sized primary LTO particles. A plurality of the nano-sized primary LTO particles is encapsulated by a non-metal layer formed by a non-metal dopant. The LTO material of the present invention has high electrical conductivity for increasing the capacity at high charging/discharging rates, and energy storage capacity.

    Abstract translation: 本发明提供一种用于锂离子电池的钛酸锂（LTO）材料。 LTO材料具有分级的微/纳米结构，并且包括多个微米级的次级LTO球体和与由金属掺杂剂形成的金属结合的多个孔。 每个微米尺寸的次级LTO球体包括多个纳米尺寸的主LTO颗粒。 多个纳米尺寸的初级LTO颗粒被非金属掺杂剂形成的非金属层封装。 本发明的LTO材料具有高电导率，用于增加高充电/放电速率下的容量和储能能力。

    FLEXIBLE POROUS FILM
    2.
    发明申请
    FLEXIBLE POROUS FILM 审中-公开
    柔性多孔膜

    公开(公告)号：US20150360409A1

    公开(公告)日：2015-12-17

    申请号：US14721002

    申请日：2015-05-26

    Applicant: Nano and Advanced Materials Institute Limited

    Inventor： Chenmin LIU ,  Lifeng CAI ,  Ka Kan WONG ,  Shing Yan CHOI

    IPC: B29C47/00 ,  H01M2/14 ,  H01M2/16

    CPC classification number: B29C48/142 ,  B01D67/0004 ,  B01D69/10 ,  B01D71/26 ,  B01D71/32 ,  B01D71/34 ,  B01D71/76 ,  B01D2323/39 ,  B29K2023/06 ,  B29K2023/12 ,  B29K2027/12 ,  B29K2027/16 ,  B29L2009/00 ,  B29L2031/3468 ,  B29L2031/755 ,  H01M2/145 ,  H01M2/162 ,  H01M2/1666 ,  H01M2/1673 ,  H01M2/1686 ,  H01M10/0525 ,  H01M10/0566 ,  H01M2300/0065 ,  H01M2300/0085

    Abstract: This invention provides a method for fabricating a flexible porous film. One application of the film is for fabricating a flexible lithium-ion battery. The method comprises depositing at least one electrospun layer on a flexible substrate sheet by electrospinning. The solution used in electrospinning comprises polyvinylidene fluoride (PVDF) and poly(vinylidene fluoride-hexafluoropropylene) (PVdF-HFP) copolymer dispersed in a solvent such that the solution has a polymer viscosity between 300 cP to 1500 cP. A preferred setting of electrospinning process parameters includes a voltage between 20 kV and 50 kV, a feed rate between 3 ml/h and 12 ml/h, and a spinning height between 100 mm and 150 mm. Preferably, PVDF and PVdF-HFP has a weight ratio between 1:1 and 5:1. The solvent may comprise dimethylformamide (DMF) and acetone in a weight ratio between 1:2 and 8:2. The weight of the copolymer is preferable to be 5% to 25% of a total weight of the copolymer and the solvent.

    Abstract translation: 本发明提供一种柔性多孔膜的制造方法。 膜的一个应用是用于制造柔性锂离子电池。 该方法包括通过静电纺丝在柔性基片上沉积至少一个电纺丝层。 用于静电纺丝的溶液包括分散在溶剂中的聚偏二氟乙烯（PVDF）和聚（偏二氟乙烯 - 六氟丙烯）（PVdF-HFP）共聚物，使得该溶液的聚合物粘度在300cP至1500cP之间。 静电纺丝工艺参数的优选设置包括20kV至50kV之间的电压，3ml / h至12ml / h之间的进料速率以及100mm至150mm之间的纺丝高度。 优选地，PVDF和PVdF-HFP的重量比为1:1至5:1。 溶剂可以包括重量比为1:2至8:2的二甲基甲酰胺（DMF）和丙酮。 共聚物的重量优选为共聚物和溶剂总重量的5〜25％。

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