公开(公告)号：US12100834B2

公开(公告)日：2024-09-24

申请号：US18616052

申请日：2024-03-25

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qingyan Ma ,  Yingjie Guan ,  Yuzhen Zhao ,  Yan Wen ,  Qisen Huang

IPC: H01M4/36 ,  C01B25/45 ,  C01B33/32 ,  H01M4/02 ,  H01M4/1315 ,  H01M4/137 ,  H01M4/505 ,  H01M4/60

CPC classification number: H01M4/366 ,  C01B25/45 ,  C01B33/32 ,  H01M4/1315 ,  H01M4/137 ,  H01M4/505 ,  H01M4/604 ,  H01M4/608 ,  C01P2002/52 ,  C01P2002/72 ,  C01P2002/85 ,  C01P2006/40 ,  H01M2004/028

Abstract: A positive electrode active material, a method for preparation thereof and a positive electrode plate, a secondary battery and an electrical device containing the same are provided. The positive electrode active material has a core-shell structure, comprising a core, a first cladding layer covering the core, a second cladding layer covering the first cladding layer, wherein the core has a chemical formula of LiaAxMn1-yByP1-zCzO4-nDn, the first cladding layer comprises a first polymer containing an electron withdrawing group, the second cladding layer comprises a second polymer, and wherein the second polymer comprises one or more of plant polysaccharides, marine polysaccharides and the derivatives thereof. The positive electrode active material of the present application enables a secondary battery to have a relatively high energy density, while further having a significantly improved rate performance, cycling performance and/or high-temperature stability.

公开(公告)号：US20240297304A1

公开(公告)日：2024-09-05

申请号：US18171799

申请日：2023-02-21

Applicant: SAFT AMERICA

Inventor： Xilin CHEN ,  Frank CAO ,  Lianxi YANG ,  Carlos NEGRETE ,  Thomas GRESZLER

IPC: H01M4/485 ,  H01M4/1315 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

CPC classification number: H01M4/485 ,  H01M4/1315 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2004/028 ,  H01M2300/004

Abstract: Provided is a lithium-ion secondary batteries including lithium vanadium fluorophosphate (e.g., LiVPO4F and its derivatives) and/or a mix containing LVPF as a positive electrode active material and an electrolytic solution including tris(trimethylsilyl)phosphate (TTSP) to reduce cycle capacity loss.

公开(公告)号：US20240178366A1

公开(公告)日：2024-05-30

申请号：US18516607

申请日：2023-11-21

Applicant: SK On Co., Ltd.

Inventor： Jae Ram Kim ,  Yong Seok Lee ,  Ki Joo Eom ,  Hyun Joong Jang

IPC: H01M4/1315 ,  H01M4/133 ,  H01M10/052

CPC classification number: H01M4/1315 ,  H01M4/133 ,  H01M10/052 ,  H01M2004/027

Abstract: A cathode for a lithium secondary battery includes a cathode current collector, a first cathode active material layer on the cathode current collector and a second cathode active material layer on the first cathode active material layer. The first cathode active material layer includes first cathode active material particles and a first binder. The first cathode active material particles include large-scaled particles having an average diameter (D50) from 10 μm to 20 μm and small-scaled particles having an average (D50) diameter from 1 μm to 9 μm. The second cathode active material layer includes second cathode active material particles having an average diameter (D50) from 1 μm to 20 μm and a second binder.

公开(公告)号：US20240097108A1

公开(公告)日：2024-03-21

申请号：US18522554

申请日：2023-11-29

Applicant: Wildcat Discovery Technologies, Inc.

Inventor： Tanghong Yi ,  Bin Li

IPC: H01M4/13915 ,  C01G45/00 ,  H01M4/04 ,  H01M4/1315 ,  H01M4/485 ,  H01M10/0525 ,  H01M10/058

CPC classification number: H01M4/13915 ,  C01G45/006 ,  H01M4/0404 ,  H01M4/0471 ,  H01M4/1315 ,  H01M4/485 ,  H01M10/0525 ,  H01M10/058 ,  C01P2004/02 ,  C01P2004/32 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/80 ,  C01P2006/40 ,  H01M2004/021

Abstract: A method for forming a cathode includes milling a suspension of precursors via a micromedia mill to form a mixture of primary particles in the suspension. The precursors include one or more metal compounds. The method includes spray drying the suspension after the milling to form secondary particles. The secondary particles are agglomerations of the primary particles. The method also includes annealing the secondary particles to form a disordered rocksalt powder.

公开(公告)号：US20240047691A1

公开(公告)日：2024-02-08

申请号：US18360024

申请日：2023-07-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Jo SAITO ,  Yohei MOMMA ,  Kunihiro FUKUSHIMA ,  Teppei OGUNI

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/1315 ,  H01M4/134

CPC classification number: H01M4/628 ,  H01M4/525 ,  H01M4/1315 ,  H01M4/134 ,  H01M2004/028

Abstract: A secondary battery with little deterioration is provided. A highly reliable secondary battery is provided. A positive electrode active material included in the secondary battery includes a crystal of lithium cobalt oxide. The positive electrode active material includes a first region including a surface parallel to the (00l) plane of the crystal and a second region including a surface parallel to a plane intersecting with the (00l) plane. The positive electrode active material contains magnesium. The first region includes a portion with a magnesium concentration that is higher than or equal to 0.5 atomic % and lower than or equal to 10 atomic %. The second region includes a portion with a magnesium concentration that is higher than the magnesium concentration in the first region and is higher than or equal to 4 atomic % and lower than or equal to 30 atomic %. Furthermore, the second region includes a portion with a fluorine concentration that is higher than a fluorine concentration in the first region and is higher than or equal to 0.5 atomic % and lower than or equal to 10 atomic %.

公开(公告)号：US11862785B2

公开(公告)日：2024-01-02

申请号：US17022532

申请日：2020-09-16

Applicant: NGK INSULATORS, LTD.

Inventor： Miyuki Kojima ,  Keita Miyanishi ,  Yosuke Sato ,  Yuji Katsuda

IPC: H01M4/1315 ,  C01D15/04 ,  H01M4/136 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/02

CPC classification number: H01M4/1315 ,  C01D15/04 ,  H01M4/136 ,  H01M10/0525 ,  H01M10/0562 ,  C01P2002/72 ,  C01P2006/40 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/008

Abstract: A lithium ion conductive material has a composition formula of Lia(OH)bFcBr, where 1.8≤a≤2.3, b=a−c−1, 0.01≤c≤0.11, and includes an antiperovskite-type crystal phase. Preferably, the lithium ion conductive material further includes a layered antiperovskite-type crystal phase. More preferably, 0≤B/(A+B)≤0.2 is satisfied, where A is the peak intensity in the vicinity of 2θ=31.2° in the X-ray diffractometry using Cu-Kα ray and B is the peak intensity in the vicinity of 2θ=30.2°.

公开(公告)号：US20230402594A1

公开(公告)日：2023-12-14

申请号：US18028364

申请日：2021-09-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryuichi Natsui ,  Junko Matsushita ,  Mitsuhiro Hibino ,  Kensuke Nakura

IPC: H01M4/505 ,  H01M4/1315 ,  H01M4/525 ,  C01G53/00

CPC classification number: H01M4/505 ,  H01M4/1315 ,  H01M2004/028 ,  C01G53/50 ,  H01M4/525

Abstract: This positive electrode active material for nonaqueous electrolyte secondary batteries contains a lithium transition metal composite oxide that is represented by composition formula LixMnyNizPaMbO2-cFc(wherein M represents at least one element that is selected from among Ti, Co, Si, Sr, Nb, W, Mo, Ca, Mg, Sb, Na, B, V, Cr, Fe, Cu, Zn, Ge, Zr, Ru, K and Bi; 1.0

公开(公告)号：US20230343952A1

公开(公告)日：2023-10-26

申请号：US18002197

申请日：2021-06-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yohei MOMMA ,  Mayumi MIKAMI ,  Teruaki OCHIAI

IPC: H01M4/525 ,  H01M4/1315 ,  H01M10/04 ,  H01M4/04 ,  C01G51/00

CPC classification number: H01M4/525 ,  H01M4/1315 ,  H01M10/049 ,  H01M4/0471 ,  C01G51/42 ,  H01M2004/028

Abstract: A positive electrode active material with high charge and discharge capacity is provided. A positive electrode active material with high charge and discharge voltage is provided. A positive electrode active material that hardly deteriorates is provided. The positive electrode active material is formed through a plurality of heating steps. The second and subsequent heating steps are preferably performed at a temperature higher than or equal to 742° C. and lower than or equal to 920° C. for longer than or equal to an hour and shorter than or equal to 10 hours. Through the heating, magnesium, fluorine, and the like are distributed in a surface portion of the positive electrode active material with preferable concentrations. The crystal structure of general lithium cobalt oxide is easily broken because it becomes the H1-3 phase type crystal structure when being charged at 4.6 V; on the other hand, the positive electrode active material of the present invention has a small ratio of the H1-3 type crystal structure when being charged at 4.6 V, and has the O3′ type crystal structure where a change in the crystal structure from discharging is relatively small, and thus has excellent cycle performance.

公开(公告)号：US20230290926A1

公开(公告)日：2023-09-14

申请号：US18200204

申请日：2023-05-22

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teruaki OCHIAI ,  Takahiro KAWAKAMI ,  Mayumi MIKAMI ,  Yohei MOMMA ,  Masahiro TAKAHASHI ,  Ayae TSURUTA

IPC: H01M4/131 ,  H01M4/1315 ,  H01M4/1391 ,  H01M4/62 ,  H01M4/13915 ,  H01M4/134 ,  H01M4/36 ,  H01M4/525 ,  H01M4/86

CPC classification number: H01M4/131 ,  H01M4/1315 ,  H01M4/1391 ,  H01M4/625 ,  H01M4/13915 ,  H01M4/134 ,  H01M4/366 ,  H01M4/525 ,  H01M4/8657 ,  H01M2004/021

Abstract: A positive electrode active material which can improve cycle characteristics of a secondary battery is provided. Two kinds of regions are provided in a superficial portion of a positive electrode active material such as lithium cobaltate which has a layered rock-salt crystal structure. The inner region is a non-stoichiometric compound containing a transition metal such as titanium, and the outer region is a compound of representative elements such as magnesium oxide. The two kinds of regions each have a rock-salt crystal structure. The inner layered rock-salt crystal structure and the two kinds of regions in the superficial portion are topotaxy; thus, a change of the crystal structure of the positive electrode active material generated by charging and discharging can be effectively suppressed. In addition, since the outer coating layer in contact with an electrolyte solution is the compound of representative elements which is chemically stable, the secondary battery having excellent cycle characteristics can be obtained.

公开(公告)号：US11677065B2

公开(公告)日：2023-06-13

申请号：US17647705

申请日：2022-01-11

Applicant: ECOPRO BM CO., LTD.

Inventor： Sung Jin Jang ,  Moon Ho Choi ,  Jun Won Suh ,  Jung Han Lee ,  Ji Hyun Nam ,  Seung Woo Choi

IPC: C01G53/00 ,  H01M4/131 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02 ,  H01M4/1315 ,  H01M4/1391 ,  H01M10/0525

CPC classification number: H01M4/1315 ,  C01G53/42 ,  C01G53/50 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  C01P2004/61 ,  C01P2004/86 ,  C01P2004/88 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: The present invention relates to a cathode active material for a lithium secondary battery, and more particularly, to a cathode active material for a lithium secondary battery, which includes a core portion and a shell portion surrounding the core portion, in which a total content of cobalt in the core portion and the shell portion is 5 to 12 mol %, and the content of cobalt in the core portion and the shell portion is adjusted to be within a predetermined range.
In the cathode active material precursor and the cathode active material for a secondary battery prepared using the same according to the present invention, optimal capacity of a lithium secondary battery may be increased by adjusting the cobalt content in the particles of the cathode active material, and life characteristics may be enhanced by improving stability.