公开(公告)号：US20160285102A1

公开(公告)日：2016-09-29

申请号：US15076137

申请日：2016-03-21

Applicant: TDK CORPORATION

Inventor： Junpei SHITABA ,  Hideaki SEKI ,  Hiroyuki MIYABARA

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/136 ,  H01M4/505 ,  H01M4/525 ,  H01M4/131 ,  H01M4/36 ,  H01M4/58

CPC classification number: H01M4/625 ,  H01M4/131 ,  H01M4/136 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode active material for lithium ion secondary battery includes: active material particles including one or more compounds including Li and a transition metal; and a coating layer coating at least a part of a surface of the active material particles. The coating layer includes at least one of graphene or multilayer graphene The coating layer has a Raman spectrum with a G band (a peak of 1530 cm−1 to 1630 cm−1), a D band (a peak of 1300 cm−1 to 1400 cm−1), and a 2D band (a peak of 2650 cm−1 to 2750 cm−1). At least the intensity of the 2D band normalized by the intensity of the G band (2Dint/Gint) satisfies 0.05≦2Dint/Gint.

Abstract translation: 锂离子二次电池用正极活性物质包括：包含一种或多种包含Li和过渡金属的化合物的活性物质颗粒; 以及涂覆有活性物质颗粒表面的至少一部分的涂层。 涂层包括石墨烯或多层石墨烯中的至少一种。涂层具有具有G带（峰值为1530cm -1至1630cm -1）的拉曼光谱，D带（1300cm -1至 1400cm -1）和2D带（2650cm -1至2750cm -1的峰）。 至少由G带的强度（2Dint / Gint）归一化的2D频带的强度满足0.05≤D2int/ Gint。

公开(公告)号：US20180287199A1

公开(公告)日：2018-10-04

申请号：US15922095

申请日：2018-03-15

Applicant: TDK CORPORATION

Inventor： Junpei SHITABA ,  Hideaki SEKI ,  Masahiro TSUCHIYA

IPC: H01M10/0525 ,  H01M2/16 ,  H01M4/62 ,  H01M4/66 ,  H01M4/52

Abstract: A positive electrode active material for a lithium ion secondary battery is lithium vanadium phosphate represented by a following composition expression (1) and in which a peak intensity ((002)int/(201)int) of a (002) plane normalized with respect to a peak intensity of a (201) plane and a peak intensity ((102)int/(201)int) of a (102) plane normalized with respect to a peak intensity of the (201) plane in an X-ray diffraction pattern satisfy 0.35≤(002)int/(201)int≤0.53 and 0.46≤(102)int/(201)int≤0.63, respectively, LixVOPO4  (1).

公开(公告)号：US20160285103A1

公开(公告)日：2016-09-29

申请号：US15077151

申请日：2016-03-22

Applicant: TDK CORPORATION

Inventor： Junpei SHITABA ,  Hideaki SEKI ,  Akinobu NOJIMA ,  Shin FUJITA ,  Masahiro SAEGUSA

IPC: H01M4/62 ,  H01M4/131 ,  H01M4/525 ,  H01M4/58 ,  H01M10/0525 ,  H01M4/36

CPC classification number: H01M4/5825 ,  H01M4/366 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/622 ,  H01M4/625 ,  H01M10/052 ,  H01M10/654 ,  H01M2004/028

Abstract: A positive electrode active material for lithium ion secondary battery, includes: a lithium nickel complex oxide represented by composition formula (1); a phosphate compound; and a coating layer formed on at least a part of a surface of a particle of the lithium nickel complex oxide, and including a high thermal conductive material with heat conductivity of 500 W/m·K or more. The coating layer of the particle of the lithium nickel complex oxide includes a portion connected to the coating layer of another particle of the lithium nickel complex oxide: LixNi1-yMyO2  (1) where M includes at least one metal selected from the group consisting of Co, Fe, Ti, Cr, Mg, Al, Cu, Ga, Mn, Zn, Sn, B, V, Ca, and Sr, and x and y are such that 0.05≦x≦1.2 and 0≦y≦0.5.

Abstract translation: 其中M包括选自Co，Fe，Ti，Cr，Mg，Al，Cu，Ga，Mn，Zn，Sn，B，V，Ca和Sr中的至少一种金属，x和y为 0.05≤x≤1.2且0≤y≤0.5。