-
1.发明授权公开(公告)号：US12237496B2
公开(公告)日：2025-02-25
申请号：US17605057
申请日：2020-04-16
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Jinhyon Lee , Hongjeong Kim , Hyeri Eom , Sangjun Lee , Daeseop Lim
Abstract: The present invention relates a negative electrode for a lithium secondary battery, and a lithium secondary battery comprising same, wherein the negative electrode for a lithium secondary battery comprises a current collector, and a negative electrode active material layer including a first layer formed on the current collector and a second layer formed on the first layer, the first layer containing a first carbon-based negative electrode active material, and the second layer containing a second carbon-based negative electrode active material, wherein the degree of divergence (DD) value of the first layer is 30-90% of the DD value of the negative electrode active material layer, the DD value is defined by formula 1 below. DD (Degree of Divergence)=(Ia/Itotal)*100 [Formula 1] (In formula 1, Ia is the sum of peak intensities of peaks at out-of plane angles as measured by XRD with CuKα, and Itotal is the sum of peak intensities of peaks at all angles as measured by XRD with CuKα).
-
公开(公告)号：US20250062340A1
公开(公告)日：2025-02-20
申请号：US18934497
申请日：2024-11-01
Applicant: ECOPRO BM CO., LTD.
Inventor： Moon Ho CHOI , Hyun Jong YU , Chang Woo LEE , Yu Kyung CHUN
Abstract: The present invention relates to a lithium composite oxide having improved stability and electrical characteristics as a positive electrode material by inhibiting an interfacial side reaction in the lithium composite oxide and improving the stability of a crystal structure and ion conductivity, and a lithium secondary battery including the same.
-
公开(公告)号：US20250062331A1
公开(公告)日：2025-02-20
申请号：US18722526
申请日：2022-12-14
Applicant: Echion Technologies Limited
Inventor： Peter Slater , Daniel Martin , Alexander Groombridge
IPC: H01M4/485 , H01M4/02 , H01M4/58 , H01M10/0525
Abstract: The invention relates to electrodes comprising a mixed niobium oxide as an active electrode material. The electrodes may be used in metal-ion batteries such as lithium-ion batteries. The mixed niobium oxide may have the formula MIx-uMy(x/(5-y))MVzNb100-(x/(5-y))-zO250-u/2, wherein: MI is a cation having an oxidation state of 1; My is a cation having an average oxidation state of y; MV is a cation having an average oxidation state of 5; 1≤y≤4; 0.5≤x≤6; 0≤z≤10; 0≤u≤5; x>u.
-
公开(公告)号：US20250062322A1
公开(公告)日：2025-02-20
申请号：US18713868
申请日：2022-11-28
Applicant: DAEJOO ELECTRONIC MATERIALS CO., LTD.
Inventor： Heon Soo PARK , Seung Min OH , Dae Woon PARK , Sung Soo KIM , Seul Gi LEE , Jong Chan LIM
IPC: H01M4/36 , H01M4/485 , H01M4/62 , H01M10/0525 , H01M10/42
Abstract: A silicon-carbon composite of the present invention comprises a lithium silicon composite oxide and carbon, wherein the lithium silicon composite oxide includes silicon particles, silicon oxide, magnesium silicate, and a lithium silicon compound. By comprising two or more carbon layers including a first carbon layer and a second carbon layer, the silicon-carbon composite can improve the performance of a secondary battery, such as slurry stability and initial charge/discharge characteristics, when used as a negative electrode active material of the secondary battery. In addition, the first carbon layer and the second carbon layer of the silicon-carbon composite satisfy specific thickness ranges, and thus, the silicon-carbon composite can further improve the performance of a secondary battery, such as capacity, cycle characteristics, and initial charge/discharge characteristics, when used as a negative electrode active material of the secondary battery.
-
公开(公告)号：US20250062310A1
公开(公告)日：2025-02-20
申请号：US18680217
申请日：2024-05-31
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Jihyun HONG , Minah LEE , Jinkwan CHOI , Hun-Gi JUNG , Dong-Ik KIM
Abstract: Provided are a prelithiation method of a silicon-based active material, the prelithiation method including step S1 of immersing the silicon-based active material in a prelithiation solution including an organic solvent and a lithium-hydrocarbon molecule complex, step S2 of obtaining a powder by washing the silicon-based active material with the organic solvent and drying the silicon-based active material, and step S3 of performing a heat treatment on the powder at a temperature of 400° C. to 800° C. in an inert gas atmosphere, and a silicon-based active material prelithiated by the method.
-
6.发明申请
公开(公告)号：US20250054948A1
公开(公告)日：2025-02-13
申请号：US18529028
申请日：2023-12-05
Applicant: HYUNDAI MOTOR COMPANY , KIA CORPORATION , WONIK QnC CORPORATION
Inventor： Je Sik Park , Hong Seok Min , Sung Woo Noh , Jeong Hyun Seo , Im Sul Seo , Ju Yeong Seong , Chung Bum Lim , Hyuk Chun Kwon , Ho Chang Lee , Seong Uk Oh , Ji Su Kim , Jong Hyun Park
IPC: H01M4/36 , C01B25/30 , C01B33/32 , C01G25/00 , C01G33/00 , C01G53/00 , H01M4/485 , H01M4/505 , H01M4/525
Abstract: A cathode active material with controlled rheological properties for lithium secondary batteries. In particular, the cathode active material for a lithium secondary battery includes: a core part comprising a lithium metal oxide; and a coating layer covering at least a portion of a surface of the core part and comprising an inorganic compound.
-
7.发明授权
公开(公告)号：US12222401B2
公开(公告)日：2025-02-11
申请号：US17774666
申请日：2021-01-12
Applicant: LG Energy Solution, Ltd.
Inventor： Su Won Jee , Hyo Jung Yoon , Young Deok Kim , Ji Yeon Kim , Dae Soo Kim
IPC: G01R31/392 , G01R31/36 , G01R31/385 , H01M4/38 , H01M4/485 , H01M4/505 , H01M4/525 , H01M10/052 , H01M10/44 , H01M4/02
Abstract: A method of diagnosing degradation of an electrode active material for a secondary battery including obtaining a first differential curve (dQ/dV) by differentiating an initial charge/discharge curve obtained by performing first charging and first discharging of the lithium secondary battery in a voltage range of 2.5 V to 4.2 V, and obtaining a second differential curve (dQ/dV) by differentiating a charge/discharge curve obtained by performing second charging and second discharging of the lithium secondary battery in a voltage range of 2.5 V to 4.2 V, and diagnosing whether a beta phase of the positive electrode active material has been formed by comparing maximum discharge peak values of the first differential curve and the second differential curve.
-
公开(公告)号：US20250038257A1
公开(公告)日：2025-01-30
申请号：US18442196
申请日：2024-02-15
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Yuiko KOITABASHI , Sayaka MORIMOTO , Asato KONDO , Tetsuya SASAKAWA
IPC: H01M10/0567 , H01M4/02 , H01M4/04 , H01M4/485 , H01M4/505 , H01M4/525 , H01M4/62 , H01M4/66 , H01M10/0568
Abstract: In general, according to one embodiment, a secondary battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte is provided. The positive electrode includes a positive electrode mixture layer containing a positive electrode active material and sulfur atoms. A mass of sulfur atoms per unit volume of the positive electrode mixture layer is 430 g/m3 or less. The nonaqueous electrolyte contains propanesultone and lithium difluorophosphate. A concentration of the propanesultone in the nonaqueous electrolyte is 0.5% by mass or more. A concentration of the lithium difluorophosphate in the nonaqueous electrolyte is 0.2% by mass or more.
-
9.发明授权
公开(公告)号：US12211997B2
公开(公告)日：2025-01-28
申请号：US15734352
申请日：2019-06-19
Applicant: LG Chem, Ltd.
Inventor： Hyeon Hui Baek , Sung Ho Ban , Jun Ho Eom , Chae Jin Lim , Sang Jo Lee , Na Ri Park
Abstract: Provided is a lithium secondary battery which includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte, wherein the positive electrode includes a lithium composite transition metal oxide powder having a layered structure and a nickel content accounting for 85 atm % or more of total transition metals, and wherein the lithium composite transition metal oxide powder undergoes a 3% or less change in lithium-oxygen (Li—O) interlayer spacing in a state-of-charge (SOC) range of 58% to 72%.
-
10.发明申请
公开(公告)号：US20250030043A1
公开(公告)日：2025-01-23
申请号：US18440018
申请日：2024-02-13
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Heidy Hodex VISBAL MENDOZA
IPC: H01M10/0562 , H01M4/02 , H01M4/04 , H01M4/485 , H01M10/0525
Abstract: In the present disclosure, a positive electrode layer used in an all-solid-state battery includes a positive electrode active material, a sulfide solid electrolyte, and a coated sulfide solid electrolyte having a coating layer covering a surface of the sulfide solid electrolyte and containing a metal sulfate, and in an S2p spectrum obtained by X-ray photoelectron spectroscopy (XPS) on the coated sulfide solid electrolyte, a ratio (P2/P1) of an intensity P2 of a peak appearing near 163 eV to an intensity P1 of a peak appearing near 167 eV is 0.15 or more and less than 0.36, thereby solving the above problem.
