-
1.发明公开公开(公告)号：US20240347706A1
公开(公告)日：2024-10-17
申请号：US18612418
申请日：2024-03-21
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Li WANG , Yan Zhou , Yuli LI , Kazumasa TAKESHI
IPC: H01M4/36 , C01B33/113 , H01M4/02 , H01M4/48 , H01M4/62 , H01M10/0525
CPC classification number: H01M4/366 , C01B33/113 , H01M4/483 , H01M4/625 , H01M10/0525 , C01P2004/84 , C01P2006/40 , H01M2004/027
Abstract: The present invention provides a negative electrode composite material, a preparation method thereof, a negative electrode and a lithium ion secondary battery. The negative electrode composite material comprises negative electrode active material particulates and Li2CO3 and LiOH at the surface of the negative electrode active material particulates, the negative electrode active material particulates comprise: particles containing silicon oxide and at least one lithium silicate selected from Li2SiO3 and Li2Si2O5; and a carbon coating layer coating at least a part of surface of the particles, based on the weight of the negative electrode active material particulates, the content of Li2CO3 is greater than about 0 wt % and less than about 0.01 wt %, and the content of LiOH is greater than about 0 wt % and less than about 0.01 wt %. By the negative electrode composite material, the preparation method thereof, the negative electrode and the lithium-ion secondary battery of the present invention, the residual lithium amount can be reduced to a great extent, the processing performance of the slurry can be significantly improved, and the initial Coulombic efficiency and cycle performance of the lithium-ion secondary battery can be improved.
-
2.发明申请公开(公告)号：US20250023036A1
公开(公告)日：2025-01-16
申请号：US18904542
申请日：2024-10-02
Applicant: MURATA MANUFACTURING CO., LTD.
IPC: H01M4/48 , C01B33/113 , H01M4/02 , H01M4/13 , H01M4/36 , H01M4/62 , H01M10/0525
Abstract: A negative electrode material for a lithium battery and a lithium ion secondary battery including same are provided. The negative electrode material for a lithium battery includes a silicon monoxide satisfying, in terms of chromaticity, 30≤L≤50, 3≤a≤10, and 1.5≤b≤10, and preferably 35≤L≤45, 4≤a≤9, and 4≤b≤10, and having a total color difference ΔE of 39≤ΔE≤50 relative to black.
-
公开(公告)号：US20220352508A1
公开(公告)日：2022-11-03
申请号：US17706189
申请日：2022-03-28
Applicant: MURATA MANUFACTURING CO., LTD.
IPC: H01M4/38 , H01M4/62 , H01M10/0525 , H01M4/04 , H01M4/66
Abstract: The present invention provides a negative electrode of lithium ion secondary battery, a preparation method thereof and a lithium ion secondary battery. The negative electrode of the lithium ion secondary battery comprises a negative electrode active material, a pre-lithiated conductive layer and a negative electrode current collector. By using the negative electrode of lithium ion secondary battery, the preparation method thereof and the lithium ion secondary battery of the present invention, technical effects of excellent electrochemical performance, especially excellent first discharge capacity and first time efficiency are achieved, and excellent negative electrode plate binding force is achieved.
-
公开(公告)号：US20200006748A1
公开(公告)日：2020-01-02
申请号：US16446033
申请日：2019-06-19
Applicant: MURATA MANUFACTURING CO., LTD.
IPC: H01M4/131 , H01M10/0525
Abstract: The present disclosure provides a positive electrode active material for a lithium ion secondary battery. The positive electrode active material includes a material represented by LiCo(1−α−β)A(α)B(β)O2, wherein the material is configured to have good cycling performance and thermal stability at high charging voltages, and to inhibit expansion of the secondary battery. The present disclosure further provides a positive electrode and a secondary battery using the same positive electrode active material.
-
5.发明公开公开(公告)号：US20240332501A1
公开(公告)日：2024-10-03
申请号：US18612265
申请日：2024-03-21
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Li WANG , Yan Zhou , Yuli LI , Kazumasa TAKESHI
CPC classification number: H01M4/364 , H01M4/366 , H01M4/483 , H01M4/485 , H01M4/625 , H01M10/0525 , H01M2004/021 , H01M2004/027
Abstract: The present invention provides a negative electrode composite material, a preparation method thereof, a negative electrode and a lithium ion secondary battery. The negative electrode composite material comprises: negative electrode active material particulates and Li2CO3 and LiOH at the surface of the negative electrode active material particulates, the negative electrode active material particulates comprise: particles containing silicon oxide, Li2SiO3 and Li2Si2O5; and a carbon coating layer coating at least a part of surface of the particles, based on the weight of the negative electrode active material particulates, the content of Li2CO3 is greater than about 0.01 wt % and less than about 1 wt %, the content of LiOH is greater than about 0.001 wt % and less than about 0.1 wt %, and the weight ratio of Li2Si2O5 to Li2SiO3, i.e. Li2Si2O5/Li2SiO3 is in the range of about 1.00 to about 10.00. By the negative electrode composite material, the preparation method thereof, the negative electrode and the lithium-ion secondary battery of the present invention, the residual lithium amount can be effectively reduced, the processing performance of the slurry can be improved, and the initial Coulombic efficiency and cycle performance of the lithium-ion secondary battery can be improved.
-
Patent Agency Ranking
公开(公告)号：US20240250244A1
公开(公告)日：2024-07-25
申请号：US18411438
申请日：2024-01-12
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Junjie GUO , Li WANG , Yan Zhou , Yuli LI , Kazumasa TAKESHI
IPC: H01M4/36 , H01M4/38 , H01M4/46 , H01M4/48 , H01M10/0525
CPC classification number: H01M4/366 , H01M4/38 , H01M4/386 , H01M4/463 , H01M4/483 , H01M10/0525 , H01M2004/027
Abstract: A composite silicon-based negative electrode material, a preparation method therefor, a negative electrode sheet comprising same, and a lithium-ion secondary battery are provided. The composite silicon-based negative electrode material comprises a silicon-based material core layer and a metal material shell layer, wherein the metal material shell layer coats the silicon-based material core layer, and the silicon-based material core layer comprises a permeation area formed by the permeation of the metal material shell layer into the silicon-based material core layer. By means of the composite silicon-based negative electrode material and the preparation method therefor of the present application, the conductivity of the negative electrode material is improved, the expansion rate of the core layer formed by the silicon-based material is limited, and the consumption of lithium ions caused by a reaction between an electrolyte and the surface of the silicon-based material is effectively reduced. Therefore, the first-time coulombic efficiency and cycle performance of the lithium-ion secondary battery formed from the composite silicon-based negative electrode material of the present application are improved.
-
公开(公告)号：US20220336796A1
公开(公告)日：2022-10-20
申请号：US17706942
申请日：2022-03-29
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Jixian LV , Yuli LI , Siming YANG
IPC: H01M4/36 , H01M4/505 , H01M4/525 , H01M4/04 , H01M10/0525
Abstract: The present invention provides a composite cathode active material, which comprises a core layer comprising a cathode active material; a hydrogen fluoride barrier layer coating the core layer, the hydrogen fluoride barrier layer comprising a substance consisting of any one of Nb, Ba, Zr, Mn, Mg, Al and Ca or any combination thereof and any one of O, F, B and P or any combination thereof; and a physical barrier layer coating the hydrogen fluoride barrier layer. By using the composite cathode active material, preparation method thereof, cathode sheet and lithium ion secondary battery of the present invention, the contacting and reacting of the hydrogen fluoride with cathode active material are effectively prevented, the dissolution of the metal in the cathode active material is inhibited, the stability of the crystal structure in the bulk phase of the cathode active material is ensured, and the increase of the cycle retention rate and the decrease of the impedance growth rate are realized.
-
公开(公告)号：US20250038192A1
公开(公告)日：2025-01-30
申请号：US18777088
申请日：2024-07-18
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Li WANG , Yuli LI , Kazumasa TAKESHI
Abstract: A manganese dioxide positive electrode material, a positive electrode sheet and a preparation method therefor, and a zinc ion battery are provided. The manganese dioxide positive electrode material for a zinc ion battery includes a mixed material of micron-sized manganese dioxide particles and nano-sized manganese dioxide particles, an aqueous binder, and a conductive agent; wherein the micron-sized manganese dioxide particles have an average particle size of about 1 μm to about 10 μm, and the nano-sized manganese dioxide particles have an average particle size of about 100 nm to about 500 nm.
-
公开(公告)号：US20250038183A1
公开(公告)日：2025-01-30
申请号：US18778499
申请日：2024-07-19
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Yuli LI , Li WANG , Kazumasa TAKESHI , Siming YANG
IPC: H01M4/36 , C01G53/00 , H01M4/02 , H01M4/1315 , H01M4/525 , H01M4/62 , H01M10/0525 , H01M10/42
Abstract: A positive electrode composite material, a preparation method thereof, a positive electrode and a lithium ion secondary battery are provided. The positive electrode composite material includes a high-nickel positive electrode material; a lithium boron oxide coating a part of the surface of the high-nickel positive electrode material; and fluoride present in a dotted form on the other part of the surface of the high-nickel positive electrode material, the amount of residual lithium on the surface of the positive electrode composite material is less than about 0.3 wt %.
-
10.发明申请公开(公告)号：US20250002370A1
公开(公告)日：2025-01-02
申请号：US18676091
申请日：2024-05-28
Applicant: MURATA MANUFACTURING CO., LTD. , Xiamen University
Inventor： Yong YANG , Xiaozhen ZHANG , Yixiao LI , Yuli LI , Li WANG , Kazumasa TAKESHI
Abstract: The present application provides a positive electrode material for a lithium ion secondary battery and a preparation method therefor. The positive electrode material for a lithium ion secondary battery comprises polycrystalline particles of a ternary positive electrode material and a modifying material. The polycrystalline particles comprise a plurality of primary particles. The modifying materials are located on the surface of the polycrystalline particles and/or at the grain boundary interfaces between the primary particles, wherein the modifying material comprises an oxide of a positive pentavalent or positive hexavalent transition metal. By using the positive electrode material for a lithium ion secondary battery and the preparation method therefor of the present application, the problem of cracking of secondary particles of the material during the circulation process is avoided. Thus, the mechanical strength and structural stability of the ternary positive electrode material are effectively improved, and at the same time, the high-temperature cycle stability of the ternary positive electrode material is significantly improved, and the impedance increase during the cycle of the lithium ion secondary battery prepared thereby is effectively reduced.
-
-
-
-
-
-
-
-
-
Search Results
15
records
(took 0.015 seconds)
