Patents by Inventor Sihui WANG
Sihui WANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11949093Abstract: This application provides a positive active material, a positive electrode plate, an electrochemical energy storage apparatus, and an apparatus. The positive active material is LixNiyCozMkMepOrAm or LixNiyCozMkMepOrAm whose surface is provided with a coating layer. The positive active material is secondary particles, and a particle size Dn10 of the positive active material satisfies: 0.5 ?m?Dn10?3 ?m. In this application, particle morphology of the positive active material and the amount of micro powder in the positive active material are properly controlled, to effectively reduce side reactions between the positive active material and an electrolyte, decrease gas production of the electrochemical energy storage apparatus, and improve storage performance of the electrochemical energy storage apparatus without deteriorating energy density, cycle performance and rate performance of the electrochemical energy storage apparatus.Type: GrantFiled: December 23, 2020Date of Patent: April 2, 2024Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LTD.Inventors: Rui Du, Na Liu, Yongchao Liu, Sihui Wang, Deyu Zhao, Xue Leng
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Patent number: 11942636Abstract: The present application relates to the electrochemical field, and in particular, to a positive electrode material, and an electrochemical energy storage apparatus having thereof. The present application provides a positive electrode material, including a substrate. The substrate includes secondary particles containing primary particles. A surface of the substrate is coated with an oxide coating layer. The oxide coating layer comprises a coating element, and the coating element is selected from one or more of Al, Ba, Zn, Ti, Zr, Mg, W, Y, Si, Sn, B, Co, or P. The electrochemical energy storage apparatus comprises the foregoing positive electrode material.Type: GrantFiled: December 28, 2020Date of Patent: March 26, 2024Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Rui Du, Yongchao Liu, Sihui Wang, Deyu Zhao, Na Liu
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Publication number: 20240079579Abstract: 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<a?0.2, 0<b?0.2, 0<c?0.7, and 0?t?0.2.Type: ApplicationFiled: November 14, 2023Publication date: March 7, 2024Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Zhenguo ZHANG, Xingkai HU, Xiang YIN, Jingpeng FAN, Sihui WANG, Zhijie YAO, Na LIU
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Publication number: 20240063381Abstract: Provided are an electrode active material, a method for preparing the electrode active material, an electrode plate, and a battery. The electrode active material includes carbon-coated metal oxide particles. The metal oxide particles satisfy a formula (2): AcMdOe??(2), where element A is selected from one or more of alkali metal elements or alkaline earth metal elements; element M is selected from one or more of transition metal elements having a relative atomic mass smaller than 65; and c>0, d>0, and e>0.Type: ApplicationFiled: October 31, 2023Publication date: February 22, 2024Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Bangrun WANG, Zhenguo ZHANG, Sihui WANG, Na LIU
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Publication number: 20230420751Abstract: A secondary battery includes a positive electrode sheet having a positive electrode active material and a non-aqueous electrolyte. The positive electrode active material includes a central core material and a modification layer disposed on a surface of the central core material. The modification layer including an orthophosphate with a molecular formula Aa+x[PO4]3?y, where A denotes one or more of Li, Na, K, Rb, Cs, Mg, Ca, Ba, Ni, Fe, Co, Ti, Al, Cr, V, Nb, and W, 1?a?6, and ax=3y. The non-aqueous electrolyte includes a fluorinated phosphate with a molecular formula Bb+m[PO1+cF3-c]c?n, where B denotes one or more of Li, Na, K, Rb, Cs, Mg, Ca, and Ba, 1?b?2, c denotes 1 or 2, and bm=cn.Type: ApplicationFiled: September 13, 2023Publication date: December 28, 2023Inventors: Zhenguo ZHANG, Chang PENG, Sihui WANG, Na LIU, Jingpeng FAN, Dong ZHAO, Zhijie YAO
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Publication number: 20230307635Abstract: This application provides a positive active material, a positive electrode plate, an electrochemical energy storage apparatus, and an apparatus. The positive active material is LixNiyCozMkMepOrAm, or LixNiyCozMkMepOrAm with a coating layer on its surface; and the positive active material is single crystal or quasi-single crystal particles, and a particle size Dn10 of the positive active material satisfies: 0.3 ?m?Dn10?2 ?m. In this application, particle morphology of the positive active material and an amount of micro powder in the positive active material are properly controlled, to effectively reduce side reactions between the positive active material and an electrolyte solution, decrease gas production of the electrochemical energy storage apparatus, and improve storage performance of the electrochemical energy storage apparatus without deteriorating an energy density, cycle performance, and rate performance of the electrochemical energy storage apparatus.Type: ApplicationFiled: May 22, 2023Publication date: September 28, 2023Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Rui DU, Yongchao Liu, Chongheng Shen, Sihui Wang, Na Liu
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Publication number: 20230282821Abstract: A spinel-type nickel-manganese-lithium-containing composite oxide, a preparation method thereof, and a secondary battery and an electric apparatus containing the same are provided. A body material of the spinel-type nickel-manganese-lithium-containing composite oxide is represented by a general formula LixNiyMnzMmO4Qq, and both element P and one or more elements selected from elements Nb, W, and Sb are doped in the body material, where based on mass of the spinel-type nickel-manganese-lithium-containing composite oxide, doping content k of the element P satisfies 0.48 wt %?k?3.05 wt %, doping content g of the one or more elements selected from the elements Nb, W, and Sb satisfies 0.05 wt %?g?0.31 wt %, and 2?k/g?20. The secondary battery provided in this application has good high-temperature storage performance and high-temperature cycling performance.Type: ApplicationFiled: May 11, 2023Publication date: September 7, 2023Inventors: Zhenguo Zhang, Jingpeng Fan, Xingkai Hu, Sihui Wang, Qiang Chen, Na Liu
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Patent number: 11699789Abstract: This application provides a positive active material, a positive electrode plate, an electrochemical energy storage apparatus, and an apparatus. The positive active material is LixNiyCozMkMepOrAm, or LixNiyCozMkMepOrAm with a coating layer on its surface; and the positive active material is single crystal or quasi-single crystal particles, and a particle size Dn10 of the positive active material satisfies: 0.3 ?m?Dn10?2 ?m. In this application, particle morphology of the positive active material and an amount of micro powder in the positive active material are properly controlled, to effectively reduce side reactions between the positive active material and an electrolyte solution, decrease gas production of the electrochemical energy storage apparatus, and improve storage performance of the electrochemical energy storage apparatus without deteriorating an energy density, cycle performance, and rate performance of the electrochemical energy storage apparatus.Type: GrantFiled: December 27, 2019Date of Patent: July 11, 2023Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Rui Du, Yongchao Liu, Chongheng Shen, Sihui Wang, Na Liu
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Publication number: 20230216047Abstract: This application provides a lithium-nickel-manganese-based composite oxide material, where a K value of the lithium-nickel-manganese-based composite oxide material ranges from 1 to 2, and the K value is calculated based on the following formula: K=Dv50/dv50, where dv50 is a volume median crystallite diameter of crystal particles of the lithium-nickel-manganese-based composite oxide material; and Dv50 is a volume median particle diameter of the lithium-nickel-manganese-based composite oxide material.Type: ApplicationFiled: February 23, 2023Publication date: July 6, 2023Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Zhenguo ZHANG, Sihui WANG
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Publication number: 20230126587Abstract: This disclosure relates to the field of electrochemistry, and in particular, to a positive electrode material, an electrochemical energy storage apparatus and a vehicle. The positive electrode material of this disclosure includes a substrate, with a formula of the substrate being LixNiyCOzMkMepOrAm, where 0.95?x?1.05, 0.50?y?0.95, 0?z?0.2, 0?k?0.4, 0?p?0.05, 1?r?2, 0?m?2, m+r?2; a coating layer is disposed on the substrate, where the coating layer includes a coating element; and absorbance of nickel leachate per unit mass of the positive electrode material w?0.7.Type: ApplicationFiled: December 22, 2022Publication date: April 27, 2023Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Rui DU, Sihui WANG, Yongchao LIU, Chi LUO, Deyu ZHAO, Na LIU
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Patent number: 11569510Abstract: This disclosure relates to the field of electrochemistry, and in particular, to a positive electrode material. The positive electrode material of this disclosure includes a substrate, with a formula of the substrate being LixNiyCozMkMepOrAm, where 0.95?x?1.05, 0.50?y?0.95, 0?z?0.2, 0?k?0.4, 0?p?0.05, 1?r?2, 0?m?2, m+r?2; a coating layer is disposed on the subs hate, where the coating layer includes a coating element; and absorbance of nickel leachate per unit mass of the positive electrode material w?0.7.Type: GrantFiled: November 4, 2021Date of Patent: January 31, 2023Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Rui Du, Sihui Wang, Yongchao Liu, Chi Luo, Deyu Zhao, Na Liu
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Publication number: 20220085378Abstract: This disclosure relates to the field of electrochemistry, and in particular, to a positive electrode material. The positive electrode material of this disclosure includes a substrate, with a formula of the substrate being LixNiyCozMkMepOrAm, where 0.95?x?1.05, 0.50?y?0.95, 0?z?0.2, 0?k?0.4, 0?p?0.05, 1?r?2, 0?m?2, m+r?2; a coating layer is disposed on the subs hate, where the coating layer includes a coating element; and absorbance of nickel leachate per unit mass of the positive electrode material w?0.7.Type: ApplicationFiled: November 4, 2021Publication date: March 17, 2022Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Rui DU, Sihui WANG, Yongchao LIU, Chi LUO, Deyu ZHAO, Na LIU
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Publication number: 20220077464Abstract: This application provides a positive active material, a positive electrode plate, an electrochemical energy storage apparatus, and an apparatus. The positive active material is LixNiyCozMkMepOrAm, or LixNiyCozMkMepOrAm with a coating layer on its surface; and the positive active material is single crystal or quasi-single crystal particles, and a particle size Dn10 of the positive active material satisfies: 0.3 ?m?Dn10?2 ?m. In this application, particle morphology of the positive active material and an amount of micro powder in the positive active material are properly controlled, to effectively reduce side reactions between the positive active material and an electrolyte solution, decrease gas production of the electrochemical energy storage apparatus, and improve storage performance of the electrochemical energy storage apparatus without deteriorating an energy density, cycle performance, and rate performance of the electrochemical energy storage apparatus.Type: ApplicationFiled: December 27, 2019Publication date: March 10, 2022Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Rui DU, Yongchao LIU, Chongheng SHEN, Sihui WANG, Na LIU
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Publication number: 20220045324Abstract: This application relates to the field of battery technologies, and in particular, to a pressure-resistant positive active material and an electrochemical energy storage apparatus. The positive active material includes secondary particles composed of primary particles, and a quantity ? of primary particles per unit sphere area in a SEM graph of the secondary particles is 5/?m2 to 30/?m2. A single-particle pressure-resistant strength of the secondary particles is 60 MPa to 300 MPa. A molecular formula of the positive active material is LixNiyCozMkMepOrAm, where 0.95?x?1.05, 0?y?1, ?z?1, 0?k?1, 0?p?0.1, 1?r?2, 0?m?2, and m+r?2. The positive active material in this application has a compact particle structure and a high single-particle pressure-resistant strength.Type: ApplicationFiled: November 25, 2019Publication date: February 10, 2022Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Rui DU, Yongchao LIU, Deyu ZHAO, Sihui WANG, Chongheng SHEN, Na LIU
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Patent number: 11121367Abstract: The disclosure provides a modified positive electrode active material, a preparation method thereof, and an electrochemical energy storage device. The modified positive electrode active material comprises positive electrode active material substrate; first oxide layer, coated on the surface of the positive electrode active material substrate and selected from one or more of oxides of element M being selected from the group of one or more of Li, Al, Zr, Mg, Ti, Y, Si, Ca, Cr, Fe, Zn, Nb, Sn, Ba, and Cd; and second oxide layer having a continuous layered structure, coated on the surface of the first oxide layer and selected from one or more of oxides of element M? being selected from one or more of Li, B, P, As, Pb, V, Mo, and Sn. High temperature storage performance and cycling performance of electrochemical energy storage device are improved by the modified positive electrode active material.Type: GrantFiled: August 24, 2017Date of Patent: September 14, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Rui Du, Na Liu, Yongchao Liu, Sihui Wang, Zhongling Xu, Chao Yang
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Publication number: 20210126245Abstract: This application provides a positive active material, a positive electrode plate, an electrochemical energy storage apparatus, and an apparatus. The positive active material is LixNiyCozMkMepOrAm or LixNiyCozMkMepOrAm whose surface is provided with a coating layer. The positive active material is secondary particles, and a particle size Dn10 of the positive active material satisfies: 0.5 ?m?Dn10?3 ?m. In this application, particle morphology of the positive active material and the amount of micro powder in the positive active material are properly controlled, to effectively reduce side reactions between the positive active material and an electrolyte, decrease gas production of the electrochemical energy storage apparatus, and improve storage performance of the electrochemical energy storage apparatus without deteriorating energy density, cycle performance and rate performance of the electrochemical energy storage apparatus.Type: ApplicationFiled: December 23, 2020Publication date: April 29, 2021Inventors: Rui DU, Na LIU, Yongchao LIU, Sihui WANG, Deyu ZHAO, Xue LENG
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Publication number: 20210119209Abstract: The present application relates to the electrochemical field, and in particular, to a positive electrode material, and an electrochemical energy storage apparatus having thereof. The present application provides a positive electrode material, including a substrate. The substrate includes secondary particles containing primary particles. A surface of the substrate is coated with an oxide coating layer. The oxide coating layer comprises a coating element, and the coating element is selected from one or more of Al, Ba, Zn, Ti, Zr, Mg, W, Y, Si, Sn, B, Co, or P. The electrochemical energy storage apparatus comprises the foregoing positive electrode material.Type: ApplicationFiled: December 28, 2020Publication date: April 22, 2021Inventors: Rui DU, Yongchao LIU, Sihui WANG, Deyu ZHAO, Na LIU
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Publication number: 20190044135Abstract: The disclosure provides a modified positive electrode active material, a preparation method thereof, and an electrochemical energy storage device. The modified positive electrode active material comprises positive electrode active material substrate; first oxide layer, coated on the surface of the positive electrode active material substrate and selected from one or more of oxides of element M being selected from the group of one or more of Li, Al, Zr, Mg, Ti, Y, Si, Ca, Cr, Fe, Zn, Nb, Sn, Ba, and Cd; and second oxide layer having a continuous layered structure, coated on the surface of the first oxide layer and selected from one or more of oxides of element M? being selected from one or more of Li, B, P, As, Pb, V, Mo, and Sn. High temperature storage performance and cycling performance of electrochemical energy storage device are improved by the modified positive electrode active material.Type: ApplicationFiled: August 24, 2017Publication date: February 7, 2019Applicant: Contemporary Amperex Technology Co., LimitedInventors: RUI DU, Na LIU, Yongchao LIU, Sihui WANG, Zhongling XU, Chao YANG
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Patent number: 9786906Abstract: Composite materials for a cathode of an electrochemical cell. The composite materials comprise Li[M1?xLix]O2 or yLi2MnO3.(1?y)LiMO2 (M=Ni, Co, Mn, 0<x<0.5, 0<y<1), and at least one of LiMn1.5Ti0.5O4 and LiMn1.5Ni0.5O4. A Li-ion electrochemical cell including a cathode comprising the composite materials is also provided. The Li-ion electrochemical cell controls irreversible capacity loss and maintain a good cycling stability.Type: GrantFiled: August 8, 2012Date of Patent: October 10, 2017Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Jihui Yang, Yan Wu, Yong Yang, Sihui Wang
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Publication number: 20150303453Abstract: Composite materials for a cathode of an electrochemical cell. The composite materials comprise Li[M1?xLix]O2 or yLi2MnO3.(1?y)LiMO2(M=Ni, Co, Mn, 0<x<0.5, 0<y<1), and at least one of LiMn1.5Ti0.5O4 and LiMn1.5Ni0.5O4. A Li-ion electrochemical cell including a cathode comprising the composite materials is also provided. The Li-ion electrochemical cell controls irreversible capacity loss and maintain a good cycling stability.Type: ApplicationFiled: August 8, 2012Publication date: October 22, 2015Inventors: Jihui YANG, Yan WU, Yong YANG, Sihui WANG