Patents by Inventor Tiancheng YI
Tiancheng YI 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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Publication number: 20210143477Abstract: The present application provides a lithium-ion battery and an apparatus, the lithium-ion battery includes an electrode assembly and an electrolyte, the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. A positive active material of the positive electrode sheet includes both Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b, a mass ratio of Lix1Coy1M11-y1O2-aQ1a and LilNim1Con1M2pM3qO2-bQ2b is 1:1-9:1. The electrolyte contains an additive A, the additive A is a six-membered nitrogen heterocyclic compound with multiple nitrile groups and with low oxidation potential. The lithium-ion battery according to the present application has excellent cycle performance and storage performance, especially under high temperature and high voltage conditions.Type: ApplicationFiled: January 12, 2021Publication date: May 13, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Yao JIANG, Chunhua HU, Tiancheng YI, Shushi DOU, Chengdu LIANG
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Publication number: 20210143476Abstract: The present application provides a lithium-ion battery and an apparatus, the lithium-ion battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separation film. The positive active material in the positive electrode sheet includes Lix1Coy1M1-y1 O2-z1Qz1, 0.5?x1?1.2, 0.8?y1?1.0, 0?z1?0.1, and M is selected from one of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolyte contains an additive A and an additive B, the additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential, and the additive B is an aliphatic dinitrile or polynitrile compound with a relatively high oxidation potential. The lithium-ion battery of the present application has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.Type: ApplicationFiled: January 8, 2021Publication date: May 13, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Tiancheng YI, Chunhua HU, Yao JIANG, Shushi DOU, Chengdu LIANG
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Publication number: 20210135218Abstract: The present application provides a lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolytic solution. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separation film. A positive active material in the positive electrode sheet includes Lix1Coy1M1-y1O2-z1Qz1. A negative active material in the negative electrode sheet includes one or more of Si, SiOx2, a Si/C composite material, and a Si alloy. The electrolytic solution contains an additive A and an addictive B, the additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential, and the additive B is a halogen-substituted cyclic carbonate compound. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.Type: ApplicationFiled: January 8, 2021Publication date: May 6, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Tiancheng YI, Chunhua HU, Shushi DOU, Yao JIANG, Chengdu LIANG
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Publication number: 20210135289Abstract: The present application provides a lithium-ion battery and an apparatus, and the lithium-ion battery includes an electrode assembly and an electrolytic solution, the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separation film. A positive active material of the positive electrode sheet includes Lix1Coy1M1-yO2-z1Qz1, 0.5?x1?1.2, 0.8?y1?1.0, 0?z1?0.1, M is selected from one or more of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolytic solution contains vinylene carbonate, fluoroethylene carbonate, 1,3-propane sultone, and an additive A. The additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.Type: ApplicationFiled: December 21, 2020Publication date: May 6, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Tiancheng YI, Chunhua HU, Yao JIANG, Shushi DOU, Chengdu LIANG
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Publication number: 20210135286Abstract: This application provides a lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. A positive active material of the positive electrode plate includes Lix1Coy1M1-y1O2-z1Qz1, where 0.5?x1?1.2, 0.8?y1?1.0, 0?z1?0.1, M is selected from one or more of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolyte contains an additive A that is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.Type: ApplicationFiled: December 13, 2019Publication date: May 6, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Tiancheng YI, Chunhua HU, Shushi DOU, Yao Jiang, Chengdu Liang
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Publication number: 20210111433Abstract: The present application provides a lithium-ion battery and an apparatus, the lithium-ion battery includes an electrode assembly and an electrolytic solution, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separation film. A positive electrode active material in the positive electrode sheet includes Lix1Coy1M1-y1O2-z1Qz1, and the positive electrode active material is a mixture of large particles Lix1Coy1M1-y1O2-z1Qz1 and small particles Lix1Coy1M1-y1O2-z1Qz1; an average particle size D50 of the large particles Lix1Coy1M1-y1O2-z1Qz1 is 10 ?m-17 ?m, and an average particle size D50 of the small particles Lix1Coy1M1-y1O2-z1Qz1 is 2 ?m-7 ?m. The electrolytic solution contains an additive A that is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The lithium-ion battery has superb cycle performance and storage performance, especially under high-temperature and high-voltage conditions.Type: ApplicationFiled: December 22, 2020Publication date: April 15, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Shushi DOU, Chunhua HU, Tiancheng YI, Yao JIANG, Chengdu LIANG
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Publication number: 20210075063Abstract: This application provides a lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. A positive active material of the positive electrode plate includes Lix1Coy1M1-y1O2-z1Qz1, where 0.5?x1?1.2, 0.8?y1?1.0, 0?z1?0.1, M is selected from one or more of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolyte contains an additive A, an additive B, and an additive C. The additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The additive B is a silyl phosphite compound or a silyl phosphate compound or a mixture thereof. The additive C is a halogen substituted cyclic carbonate compound.Type: ApplicationFiled: December 13, 2019Publication date: March 11, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Shushi Dou, Chunhua Hu, Tiancheng Yi, Yao Jiang, Chengdu Liang
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Patent number: 10938068Abstract: This application provides a lithium-ion battery and an apparatus. The lithium-ion battery includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. A positive active material of the positive electrode plate includes Lix1Coy1M1-y1O2-z1Qz1, where 0.5?x1?1.2, 0.8?y1<1.0, 0?z1?0.1, M is selected from one or more of Al, Ti, Zr, Y, and Mg, and Q is selected from one or more of F, Cl, and S. The electrolyte contains an additive A, an additive B, and an additive C. The additive A is a polynitrile six-membered nitrogen-heterocyclic compound with a relatively low oxidation potential. The additive B is an anhydride compound. The additive C is a halogen substituted cyclic carbonate compound.Type: GrantFiled: December 13, 2019Date of Patent: March 2, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Yao Jiang, Chunhua Hu, Tiancheng Yi, Shushi Dou, Chengdu Liang
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Patent number: 10897063Abstract: This application provides an electrolyte and an electrochemical device, in which the electrolyte comprises an additive A and an additive B, wherein the additive A is present in an amount of 0.01% to 10% by mass in the electrolyte and the additive B is present in an amount of 0.1% to 10% by mass in the electrolyte and the electrolyte has a conductivity of 6 mS/cm to 10 mS/cm at 25° C. The present invention can improve the cycle performance and storage performance of the electrochemical device, in particular, improve the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions while keeping the low temperature performance.Type: GrantFiled: April 2, 2019Date of Patent: January 19, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Yao Jiang, Chunhua Hu, Tiancheng Yi, Lu Miao, Chengdu Liang
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Patent number: 10868334Abstract: This application provides an electrolyte and an electrochemical device, in which the electrolyte comprises an additive A and an additive B, wherein the additive A is present in an amount of 0.001% to 10% by mass in the electrolyte and the additive B is present in an amount of 0.1% to 10% by mass in the electrolyte and the electrolyte has a conductivity of 4 mS/cm to 12 mS/cm at 25° C. The present invention can improve the cycle performance and storage performance of the electrochemical device, in particular, improve the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions while keeping the low temperature performance.Type: GrantFiled: March 15, 2019Date of Patent: December 15, 2020Assignee: Contemporary Amperex Technology Co., LimitedInventors: Tiancheng Yi, Chunhua Hu, Zijun Xu, Lu Miao, Chengdu Liang
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Patent number: 10862170Abstract: The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and a battery using the electrolyte. The electrolyte contains an additive selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof. The addition of the multi-cyano six-membered N-heterocyclic compound as an additive in the electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material and inhibit oxidation of the electrolyte. The battery using the electrolyte according the present disclosure has good cycle performance at high temperature and high voltage and good storage performance, while gas production of the battery is reduced.Type: GrantFiled: July 18, 2017Date of Patent: December 8, 2020Assignee: Contemporary Amperex Technology Co., LimitedInventors: Tiancheng Yi, Chunhua Hu, Li Hao, Yingjie Zhan, Chengdu Liang
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Patent number: 10826124Abstract: An electrolyte and an electrochemical device, which relates to the field of energy storage materials. The electrolyte includes an additive A, an additive B and an additive C, the additive A selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 or Formula I-3, and combinations thereof, the additive B is at least one sulfonate compound, and the additive C is at least one halogenated cyclic carbonate compound. The electrochemical device includes the above electrolyte.Type: GrantFiled: July 18, 2017Date of Patent: November 3, 2020Assignee: Contemporary Amperex Technology Co., Ltd.Inventors: Tiancheng Yi, Chunhua Hu, Yao Jiang, Lu Miao, Chengdu Liang
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Publication number: 20200185772Abstract: The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and an electrochemical device. The electrolyte includes an additive A and an additive B, the additive A is selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof, and the additive B is at least one halogenated cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, while an anode SEI film can be formed to avoid a contact between the anode and the electrode and thus to effectively reduce side reactions.Type: ApplicationFiled: July 18, 2017Publication date: June 11, 2020Applicant: Contemporary Ampere Technology Co., LimitedInventors: Lu MIAO, Chunhua HU, Tiancheng YI, Yao JIANG, Chengdu LIANG
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Publication number: 20200176817Abstract: The present application relates to the field of energy storage materials, and particularly, to an electrolytic solution and a battery using the electrolytic solution. The electrolytic solution of the present application contains an additive, the additive including a multi-cyano compound represented by formula (I). The multi-cyano compound of the present application has a stronger complexation with a transition metal on the surface of a positive electrode material, and therefore a protective film can be formed on the surface of the positive electrode material, and the dissolution of the transition metal is effectively suppressed; the surface activity of the positive electrode material is reduced, thereby suppressing side reactions, such as the decomposition of the electrolytic solution on the surface of the positive electrode material; and the cycle performance and storage performance of a battery under wide range of working voltage and wide range of operating temperature conditions are thus improved.Type: ApplicationFiled: July 18, 2017Publication date: June 4, 2020Inventors: Shushi DOU, Chunhua HU, Tiancheng YI, Jian YAN, Chengdu LIANG, Li HAO
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Publication number: 20200127330Abstract: An electrolyte and an electrochemical device, which relates to the field of energy storage materials. The electrolyte includes an additive A, an additive B and an additive C, the additive A selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 or Formula I-3, and combinations thereof, the additive B is at least one sulfonate compound, and the additive C is at least one halogenated cyclic carbonate compound. The electrochemical device includes the above electrolyte.Type: ApplicationFiled: July 18, 2017Publication date: April 23, 2020Inventors: Tiancheng YI, Chunhua HU, Yao JIANG, Lu MIAO, Chengdu LIANG
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Publication number: 20200052332Abstract: The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and a battery using the electrolyte. The electrolyte contains an additive selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof. The addition of the multi-cyano six-membered N-heterocyclic compound as an additive in the electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material and inhibit oxidation of the electrolyte. The battery using the electrolyte according the present disclosure has good cycle performance at high temperature and high voltage and good storage performance, while gas production of the battery is reduced.Type: ApplicationFiled: July 18, 2017Publication date: February 13, 2020Inventors: Tiancheng YI, Chunhua HU, Li HAO, Yingjie ZHAN, Chengdu LIANG
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Publication number: 20190326635Abstract: This application provides an electrolyte and an electrochemical device, in which the electrolyte comprises an additive A and an additive B, wherein the additive A is present in an amount of 0.01% to 10% by mass in the electrolyte and the additive B is present in an amount of 0.1% to 10% by mass in the electrolyte and the electrolyte has a conductivity of 6 mS/cm to 10 mS/cm at 25° C. The present invention can improve the cycle performance and storage performance of the electrochemical device, in particular, improve the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions while keeping the low temperature performance.Type: ApplicationFiled: April 2, 2019Publication date: October 24, 2019Applicant: Contemporary Amperex Technology Co., LimitedInventors: Yao JIANG, Chunhua HU, Tiancheng YI, Lu MIAO, Chengdu LIANG
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Publication number: 20190326633Abstract: This application provides an electrolyte and an electrochemical device, in which the electrolyte comprises an additive A and an additive B, wherein the additive A is present in an amount of 0.001% to 10% by mass in the electrolyte and the additive B is present in an amount of 0.1% to 10% by mass in the electrolyte and the electrolyte has a conductivity of 4 mS/cm to 12 mS/cm at 25° C. The present invention can improve the cycle performance and storage performance of the electrochemical device, in particular, improve the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions while keeping the low temperature performance.Type: ApplicationFiled: March 15, 2019Publication date: October 24, 2019Applicant: Contemporary Amperex Technology Co., LimitedInventors: Tiancheng YI, Chunhua HU, Zijun XU, Lu MIAO, Chengdu LIANG
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Publication number: 20190326641Abstract: This application provides an electrolyte and a battery. The electrolyte comprises an electrolytic salt and an organic solvent comprising a cyclic carbonate and a chain carbonate. The electrolyte further comprises an additive A and an additive B, wherein the additive A is a positive-electrode film-forming additive, the additive B is a negative-electrode film-forming additive, and the reduction potential of the additive B is higher than that of the cyclic carbonate, and the electrolyte has a conductivity of 6 mS/cm to 10 mS/cm at 25° C. The electrolyte of the present application can improve the cycle performance and storage performance of the battery, in particular, improve the cycle performance and storage performance of the battery under high temperature and high voltage conditions, and at the same time balance the low-temperature performance of the battery.Type: ApplicationFiled: March 19, 2019Publication date: October 24, 2019Applicant: Contemporary Amperex Technology Co., LimitedInventors: Shushi Dou, Chunhua Hu, Tiancheng Yi, Zijun Xu, Chengdu Liang
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Publication number: 20190326634Abstract: This application provides an electrolyte and an electrochemical device, wherein the electrolyte comprises an additive A and an additive B, the additive A is present in an amount of 0.001% to 10% by mass in the electrolyte, and the additive B is present in an amount of 0.1% to 10% by mass in the electrolyte. This application can improve the cycle performance and storage performance of the electrochemical device, especially the cycle performance and storage performance of the electrochemical device under high temperature and high voltage conditions.Type: ApplicationFiled: March 30, 2019Publication date: October 24, 2019Applicant: Contemporary Amperex Technology Co., LimitedInventors: Tiancheng Yi, Chunhua Hu, Lu Miao, Zijun Xu, Chengdu Liang