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公开(公告)号：US20250006889A1
公开(公告)日：2025-01-02
申请号：US18758800
申请日：2024-06-28
Applicant: Ningde Amperex Technology Limited
Inventor： Zheng Yi , Fujin Tan , Wenlong Shao , Yuansen Xie
Abstract: A negative electrode includes: a negative electrode current collector and a negative electrode active material layer located on at least one surface of the negative electrode current collector. The negative electrode active material layer includes a negative electrode active material, where the negative electrode active material includes graphite and hard carbon. Based on a total mass of the hard carbon, a ratio of a mass of element hydrogen to a mass of element carbon in the hard carbon is W1, and based on a total mass of the graphite, a ratio of a mass of element hydrogen to a mass of element carbon in the graphite is W2, a value of W1/W2 being within a range of 5 to 19. The electrochemical apparatus has reduced impedance and improved rate performance and cycling performance.
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公开(公告)号：US11145852B2
公开(公告)日：2021-10-12
申请号：US16299409
申请日：2019-03-12
Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED
Inventor： Daoyi Jiang , Hang Cui , Yuansen Xie
IPC: H01M4/134 , H01M4/131 , H01M4/133 , H01M4/36 , H01M4/38 , H01M4/46 , H01M4/58 , H01M10/0525 , H01M4/02
Abstract: The present application relates to an anode active material and an anode, an electrochemical device and an electronic device using same. Specifically, the present application provides an anode active material, including a lithiated silicon-oxygen material and a coating layer, where there is at least a Si—O-M bond between the coating layer and the lithiated silicon-oxygen material, where M is selected from one or more of an aluminum element, a boron element and a phosphorus element. The anode active material of the present application has high stability and is suitable for aqueous processing to be prepared into an anode.
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3.发明申请公开(公告)号：US20200014028A1
公开(公告)日：2020-01-09
申请号：US16548855
申请日：2019-08-23
Applicant: Ningde Amperex Technology Limited
Inventor： Hang Cui , Taiqiang Chen , Yuansen Xie
Abstract: The present invention provides a modified graphite negative electrode material, preparation method thereof and a secondary battery. The modified graphite negative electrode material includes a graphite and a multilayer graphene. The multilayer graphene are dispersed in the graphite. The multilayer graphene are loaded with a conductive agent by bonding of a binder. The modified graphite negative electrode material can achieve a higher compaction density for the negative electrode, and can effectively improve the lithium precipitation of the negative electrode of the secondary battery while improving the cycle performance of the secondary battery when being applied to the secondary battery.
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公开(公告)号：US11967718B2
公开(公告)日：2024-04-23
申请号：US18073884
申请日：2022-12-02
Applicant: Ningde Amperex Technology Limited
Inventor： Lihong He , Jia Tang , Jiali Dong , Yuansen Xie
CPC classification number: H01M4/587 , C01B32/20 , C01P2002/74 , C01P2002/82 , C01P2004/03 , C01P2006/40 , H01M2004/021 , H01M2004/027
Abstract: A negative active material includes a carbon material. The carbon material satisfies the following relationship: 6
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公开(公告)号：US11936045B2
公开(公告)日：2024-03-19
申请号：US18173295
申请日：2023-02-23
Applicant: Ningde Amperex Technology Limited
Inventor： Lihong He , Jia Tang , Jiali Dong , Yuansen Xie
CPC classification number: H01M4/587 , C01B32/20 , C01P2002/74 , C01P2002/82 , C01P2004/03 , C01P2006/40 , H01M2004/021 , H01M2004/027
Abstract: A negative active material includes a carbon material. The carbon material satisfies the following relationship: 6
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Patent Agency Ranking
公开(公告)号：US20230068610A1
公开(公告)日：2023-03-02
申请号：US17973865
申请日：2022-10-26
Applicant: Ningde Amperex Technology Limited
Inventor： Chao Wang , Ting Yi , Hang Cui , Yuansen Xie
IPC: H01M4/58 , H01M4/62 , H01M4/36 , C01B32/907
Abstract: A negative electrode material, and a negative electrode plate, an electrochemical device, and an electronic device including the same. The negative electrode material includes SiMxCy, where 0.5≤x≤2, 0.5≤y≤4, and M includes at least one of boron, nitrogen, oxygen, or aluminum; for SiMxCy, a particle size at a quantity accumulation degree of A % is DNA, a particle size at a volume accumulation degree of B % is DVB, and a half-peak width of a quantity distribution curve is ΔDN; and 2 μm≤(DV50−DN50)≤6 μm, and 1≤(DN99−DN1)/ΔDN≤1.3. The use of the negative electrode material, and the negative electrode plate, the electrochemical device and the electronic device including the same according to the present application achieve good cycle performance and energy density.
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公开(公告)号：US20230034617A1
公开(公告)日：2023-02-02
申请号：US17952646
申请日：2022-09-26
Applicant: Ningde Amperex Technology Limited
Inventor： Qunchao Liao , Hang Cui , Yuansen Xie , Chao Wang
Abstract: A negative electrode material includes silicon-based particles and graphite particles. In a case that a Dn50/Dv50 ratio of the graphite particles is A and a Dn50/Dv50 ratio of the silicon-based particles is B, the following conditional expressions (1) to (3) are satisfied: 0.1≤A≤0.65 (1); 0.3≤B≤0.85 (2); and B>A (3), where, Dv50 is a particle diameter of particles measured when a cumulative volume fraction in a volume-based distribution reaches 50%, and Dn50 is a particle diameter of particles measured when a cumulative number fraction in a number-based distribution reaches 50%. The present invention further provides a negative electrode plate, a lithium-ion secondary battery or electrochemical device containing the negative electrode plate, and an electronic device containing the lithium-ion secondary battery and/or electrochemical device.
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公开(公告)号：US20220328842A1
公开(公告)日：2022-10-13
申请号：US17709572
申请日：2022-03-31
Applicant: Ningde Amperex Technology Limited
Inventor： Wenhao Guan , Maohua Chen , Yuansen Xie
IPC: H01M4/62 , H01M4/38 , H01M4/134 , H01M10/052
Abstract: A negative electrode plate includes a negative current collector, a lithium metal negative electrode, and a negative electrode framework. A polarization electric field exists inside the negative electrode framework. A direction of the polarization electric field is directed from a surface of the negative electrode to the negative current collector. A material of the negative electrode framework includes at least one of a piezoelectric polymer, piezoelectric ceramic, or piezoelectric monocrystal. The negative electrode plate can control lithium deposition sites, effectively suppress the growth of lithium dendrites, effectively mitigate volume expansion of the electrochemical device, and further improve cycle performance of the electrochemical device.
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9.发明授权公开(公告)号：US11223041B2
公开(公告)日：2022-01-11
申请号：US16393182
申请日：2019-04-24
Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED
Inventor： Daoyi Jiang , Zhihuan Chen , Hang Cui , Yuansen Xie
IPC: H01M4/36 , H01M4/38 , H01M4/134 , H01M4/131 , H01M4/133 , H01M10/0569 , H01M10/0525 , H01M4/62
Abstract: The present application relates to an anode active material and an anode, an electrochemical device and an electronic device using the same. Specifically, the present application provides an anode active material, including a lithiated silicon-oxygen material and a coating layer, where the coating layer and the lithiated silicon-oxygen material at least have one or more structural units selected from formulae CF2a, CHFb and CH2c therebetween, where a, b, and c are integers greater than or equal to 6. The anode active material of the present application has high stability and is suitable for being subjected to aqueous processing to obtain the anode.
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公开(公告)号：US12237504B2
公开(公告)日：2025-02-25
申请号：US17312208
申请日：2019-12-17
Applicant: Ningde Amperex Technology Limited
Inventor： Daoyi Jiang , Hang Cui , Yuansen Xie
Abstract: An anode material includes a silicon compound SiOx, where x is about 0.5 to 1.5; an oxide MeOy layer, the MeOy layer coating the silicon compound SiOx, where y is about 0.5 to 3; and a carbon layer, the carbon layer coating the MeOy layer. Me includes at least one of Al, Si, Ti, Mn, V, Cr, Co, and Zr. The surface of the MeOy layer adjacent to the carbon layer has an open pore structure, and at least part of the open pore structure is filled with the carbon layer. The anode material improves the cycle performance of the electrochemical device and significantly reduce the impedance of the electrochemical device.
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