公开(公告)号：US20200075936A1

公开(公告)日：2020-03-05

申请号：US16459614

申请日：2019-07-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuji TSUJITA ,  Kensuke NAKURA ,  Shuhei UCHIDA ,  Ryuichi NATSUI

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/505 ,  H01M4/62 ,  H01M10/0525

Abstract: Provided is a cathode active material including a lithium composite oxide and a covering material which covers a surface of the lithium composite oxide. The lithium composite oxide is a multi-phase mixture including a first phase having a crystal structure which belongs to a space group C2/m and a second phase having a crystal structure which belongs to a space group R-3m. The lithium composite oxide has an integral intensity ratio I(18°-20°)/I(43°-46°) of not less than 0.05 and not more than 1.15, where the integral intensity ratio I(18°-20°)/I(43°-46°) is a ratio of an integral intensity I(18°-20°) to an integral intensity I(43°-46°). The integral intensity I(α°-β°) is an integral intensity of a first peak which is a maximum peak present within a range of a diffraction angle 2θ of not less than α° and not more than β° in an X-ray diffraction pattern of the lithium composite oxide. The covering material has an electronic conductivity of not more than 106 S/m.

公开(公告)号：US20210005884A1

公开(公告)日：2021-01-07

申请号：US17028424

申请日：2020-09-22

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Ryuichi NATSUI ,  Kensuke NAKURA

IPC: H01M4/1315 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0566 ,  C01G51/00 ,  C01G45/00 ,  C01G53/00 ,  H01M4/485 ,  H01M10/0525

Abstract: A positive-electrode active material containing a compound that has a crystal structure belonging to the space group FM-3M and is represented by the composition formula (1): LixMeyOαFβ  (1) wherein Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, and Al, and the following conditions are satisfied.
1.3≤x≤2.2,
0.8≤y≤1.3,
1≤α≤2.93,
0.07≤β≤2.

公开(公告)号：US20210083274A1

公开(公告)日：2021-03-18

申请号：US17108810

申请日：2020-12-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki ISHIKAWA ,  Ryuichi NATSUI ,  Issei IKEUCHI ,  Kensuke NAKURA

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/48 ,  H01M10/0525 ,  C01G45/12 ,  H01M4/62 ,  C01G53/00 ,  C01G51/00

Abstract: A positive electrode active material includes a lithium composite oxide and a covering material that covers a surface of the lithium composite oxide. The covering material has an electron conductivity of 106 S/m or less. The lithium composite oxide is a multiphase mixture including a first phase having a first crystal structure that belongs to a space group Fm-3m and a second phase having a second crystal structure that belongs to a space group other than a space group Fm-3m. The ratio I(18°-20°)/I(43°-46°) of a first integrated intensity I(18°-20°) of a first maximum peak present at a first diffraction angle 2θ of 18° or more and 20° or less to a second integrated intensity I(43°-46°) of a second maximum peak present at a second diffraction angle 2θ of 43° or more and 46° or less in an XRD pattern of the lithium composite oxide satisfies 0.05≤I(18°-20°)/I(45°-46°)≤0.90.

公开(公告)号：US20210005883A1

公开(公告)日：2021-01-07

申请号：US17024313

申请日：2020-09-17

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Ryuichi NATSUI ,  Kensuke NAKURA

IPC: H01M4/1315 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  C01G45/00 ,  C01G51/00 ,  H01M10/0566 ,  H01M10/052 ,  H01M10/0525

Abstract: A positive-electrode active material contains a compound that has a crystal structure belonging to a space group FM3-M and that is represented by the composition formula (1): LixAyMezOαFβ  (1) wherein A denotes Na or K, Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr, and the following conditions are satisfied. 1.7≤x+y≤2.2 0

公开(公告)号：US20210005882A1

公开(公告)日：2021-01-07

申请号：US17021468

申请日：2020-09-15

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Ryuichi NATSUI ,  Kensuke NAKURA

IPC: H01M4/1315 ,  H01M4/505 ,  H01M10/052 ,  C01G51/00 ,  C01G45/00 ,  H01M4/36 ,  C01G53/00 ,  H01M4/485 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/62

Abstract: A positive-electrode active material contains a compound that has a crystal structure belonging to a space group FM3-M and contains is represented by the composition formula (1) and an insulating compound, LixMeyOαFβ  (1) wherein Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr, and the following conditions are satisfied. 1.7≤x≤2.2 0.8≤y≤1.3 1≤α≤2.5 0.5≤β≤2