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1.发明公开公开(公告)号：US20240079579A1
公开(公告)日：2024-03-07
申请号：US18508954
申请日：2023-11-14
发明人： Zhenguo ZHANG , Xingkai HU , Xiang YIN , Jingpeng FAN , Sihui WANG , Zhijie YAO , Na LIU
CPC分类号： H01M4/505 , C01G45/1242 , H01M2004/028
摘要： A positive active material, a secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The positive active material includes a spinel-type lithium-manganese-containing composite oxide with a molecular formula of Li1+xAaMbXcMn2−a−b−c−xO4−t. In the molecular formula: A is a doping element for a manganese site of the spinel-type lithium-manganese-containing composite oxide; M is used for combining with O to form a second phase containing a polyoxyanion, and M includes one or more of B, C, N, Si, P, S, or Cl; X includes one or more of Mg, Al, Si, Ca, Sc, Ti, Cr, Fe, Co, Ni, Cu, Zn, or Zr; and the molecular formula satisfies: −0.1≤x≤0.3, 0
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公开(公告)号：US20230327100A1
公开(公告)日：2023-10-12
申请号：US18324592
申请日：2023-05-26
发明人： Huan NI , Changfeng BIE , Xiang YIN , Shaocong OUYANG , Miaomiao DONG , Na LIU
CPC分类号： H01M4/505 , C01G53/50 , H01M4/366 , H01M4/525 , H01M2004/021
摘要： A single-crystalline-structured low-cobalt ternary positive material, a chemical formula thereof is Li1+x(NiaCobMnc)1-dMdO2-yAy, where a mole fraction of Co element is low. 0.05 ≤ b ≤ 0.14; and in a single particle, a ratio of an average Co content per unit area of an outer layer to an average Co content per unit area of an inner core in a cross section passing through a geometric center of the particle is in a range 1.2-5.0:1, optionally, in a range 1.4-2.0:1 is disclosed. The material has better structural stability and dynamic performance at low temperature and high voltage, which improves cycle performance and power performance of the secondary battery at low temperature and high voltage. A method for preparing the low-cobalt ternary positive material, a secondary battery, a battery module, a battery pack, and a power consumption apparatus including the material is also disclosed
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公开(公告)号：US20230049880A1
公开(公告)日：2023-02-16
申请号：US17967844
申请日：2022-10-17
发明人： Jiarui TIAN , Yongsheng GUO , Cong CHENG , Yuanyuan LAN , Shuojian SU , Xinxin ZHANG , Na LIU , Chuying OUYANG
IPC分类号： H01M50/449 , H01M50/411 , H01M50/431
摘要： The present application provides an organic-inorganic hybrid complex which can be used in a coating of a separator for a secondary battery, wherein the organic-inorganic hybrid complex is formed from basic units represented by formula (I) being periodically assembled in at least one spatial direction: [Lx-i□i][MaCb].Az (I), wherein a defect percentage expressed in i/x*100% is 1% to 30%. The present application further provides a coating composition comprising the organic-inorganic hybrid complex, a coating formed from the coating composition, a separator comprising the coating for a secondary battery, a secondary battery comprising the separator, a battery module, a battery pack and a device. By applying the organic-inorganic hybrid complex of the present application in a coating, the electrolyte infiltration of a separator for a secondary battery is improved while increasing the electrolyte retention rate, thereby improving the rate capability and cycling life of the secondary battery.
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公开(公告)号：US20230017049A1
公开(公告)日：2023-01-19
申请号：US17940913
申请日：2022-09-08
发明人： Haiyi HONG , Jianrui YANG , Cong CHENG , Yuanyuan LAN , Na LIU , Haizu JIN
IPC分类号： H01M50/446 , H01M50/449 , H01M10/0525 , H01M50/417 , H01M50/489 , H01M50/403
摘要： The present application relates to a separator, comprising a substrate and a coating formed on at least one surface of the substrate; wherein the coating comprises inorganic particles and organic particles, the organic particles comprise first organic particles and second organic particles both embedded in the inorganic particles and forming protrusions on the surface of the coating, the first organic particles have a number-average particle size of ≥8 μm; the second organic particles have a number-average particle size of ≥2 μm, and at least part of the second organic particles comprise a core structure and a shell structure. The present application also relates to a secondary battery comprising the separator, a device comprising the secondary battery and a method for preparing the separator.
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公开(公告)号：US20220352600A1
公开(公告)日：2022-11-03
申请号：US17866409
申请日：2022-07-15
发明人： Yongsheng GUO , Jiarui TIAN , Cong CHENG , Na LIU , Chuying OUYANG , Yuanyuan LAN , Shuojian SU
IPC分类号： H01M50/446 , H01M50/449 , H01M50/403
摘要： This application provides a separator, an electrical apparatus containing such separator, and preparation methods thereof. The separator includes a coating layer containing an organic-inorganic hybrid composite compound and provides improved performance in a number of aspects, and the organic-inorganic hybrid composite compound is formed by periodically assembling, along at least one spatial direction, basic units expressed by formula I, Lx(MaCb)y•Az. This application further provides a battery and electrical device containing such separator, preparation methods thereof, organic-inorganic hybrid composite compound for improving performance of a separator.
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公开(公告)号：US20220352599A1
公开(公告)日：2022-11-03
申请号：US17864297
申请日：2022-07-13
发明人： Yuanyuan LAN , Cong CHENG , Jianrui YANG , Haiyi HONG , Na LIU , Haizu JIN
IPC分类号： H01M50/446 , H01M50/403
摘要： This application relates to a separator, including: a substrate; and a coating layer provided on at least one surface of the substrate; where the coating layer includes inorganic particles and organic particles, the organic particles include first organic particles, the first organic particles are embedded into the inorganic particles and form bulges on a surface of the coating layer, and a number-based median particle size of the first organic particles is ≥12 μm. This application further relates to a method for preparing the separator, a secondary battery containing the separator, a battery module including the secondary battery, a battery pack, and an apparatus.
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7.发明公开公开(公告)号：US20230246184A1
公开(公告)日：2023-08-03
申请号：US18118754
申请日：2023-03-08
发明人： Qifeng LI , Qilan ZHANG , Na LIU
IPC分类号： H01M4/525 , H01M4/04 , H01M4/131 , H01M10/0525
CPC分类号： H01M4/525 , H01M4/0404 , H01M4/131 , H01M10/0525 , H01M2004/021
摘要： The present application discloses a positive electrode active material, a positive electrode plate, a lithium-ion secondary battery, and an apparatus. The positive electrode active material satisfies a chemical formula Li1+x(NiaCobMnc)1-dMdO2-yAy, wherein M is one or more selected from Zr, Sr, B, Ti, Mg, Sn and Al, A is one or more selected from S, N, F, Cl, Br and I, −0.01≤x≤0.2, 0.12≤b/c≤0.9, 0.002≤b×c/a2≤0.23, a+b+c=1, 0≤d≤0.1, and 0≤y
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8.发明公开公开(公告)号：US20230207782A1
公开(公告)日：2023-06-29
申请号：US18109812
申请日：2023-02-14
发明人： Yingjie GUAN , Yongchao LIU , Qisen HUANG , Na LIU , Chengdu LIANG
CPC分类号： H01M4/364 , H01M4/525 , H01M4/505 , H01M4/485 , H01M4/0471 , H01M4/621 , H01M2004/021
摘要： This application relates to an electrode active composition, a preparation method thereof, an electrode, a battery, and an apparatus. The electrode active composition includes: a first component, the first component being lithium cobalt oxide particles; and a second component, the second component being ternary material particles. The first component includes lithium cobalt oxide particles with a particle size greater than 11 μm and lithium cobalt oxide particles with a particle size less than 6 μm, and a ratio in number of the lithium cobalt oxide particles with a particle size greater than 11 μm to the lithium cobalt oxide particles with a particle size less than 6 μm is 0.2-4.8, and in some embodiments, 0.2-2.8. A summed number of the lithium cobalt oxide particles with a particle size greater than 11 μm and the lithium cobalt oxide particles with a particle size less than 6 μm accounts for above 90% of a total number of particles in the first component.
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9.发明公开公开(公告)号：US20230170472A1
公开(公告)日：2023-06-01
申请号：US18084551
申请日：2022-12-20
发明人： Changfeng BIE , Huan NI , Xue LENG , Miaomiao DONG , Shaocong OUYANG , Na LIU
CPC分类号： H01M4/366 , H01M4/587 , H01M4/525 , H01M4/625 , H01M2004/028
摘要： A positive electrode plate may include a current collector, a first positive electrode active material layer and a second positive electrode active material layer. The first positive electrode active material layer may comprise a first positive electrode active material, a first binder and a first conductive agent; the second positive electrode active material layer may comprise a second positive electrode active material, a second binder and a second conductive agent. The second positive electrode active material may be selected from carbon-coated LiβFeαM(1−α)PO4, and the second positive electrode active material may have a diffraction peak A between 29° and 30° in the X-ray diffraction pattern, and a diffraction peak B between 25° and 26°, and the intensity ratio IA/IB of the diffraction peaks may satisfy: 0.98≤IA/IB≤1.1.
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10.发明公开公开(公告)号：US20240262711A1
公开(公告)日：2024-08-08
申请号：US18500131
申请日：2023-11-02
发明人： Zhenguo ZHANG , Sihui WANG , Jingpeng FAN , Na LIU
IPC分类号： C01G53/00
CPC分类号： C01G53/54 , C01P2006/40
摘要： The present application provides a positive electrode active material of Li1+xNiyMzMn2-x-y-zO4-k, −0.1≤x≤0.2, 0.4≤y≤0.6, 0≤z≤0.2, M is one or more of Cr, Mo, Nb, Ru, P, S, Ta, W, Tl, and Ti, and in a first-cycle charging curve of a half battery of the positive electrode active material, a ratio of a charging capacity of 3.5 V-4.4 V to a charging capacity of 3.5 V-4.95 V is A, A meets 0.04≤A≤0.3, a product of k and A meets 0≤kA≤0.015, and the first-cycle charging curve is measured at a rate of 0.1 C. The positive electrode active material of the present application balances high kinetic performance and high chemical stability, and a corresponding secondary battery has both high-rate discharge capability and long-term storage stability.
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