Patents by Inventor Zijun XU
Zijun XU 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).
-
Publication number: 20220148212Abstract: Disclosed is a method for measuring surface tension based on an axisymmetric droplet contour curve. The method comprises: photographing a suspended droplet image, and extracting a droplet contour curve; selecting a measurement point on the droplet contour curve; and calculating the surface tension of a liquid using the following formula ? = ?? ? ? gV + P ? ? ? ? ? R 2 2 ? ? ? ? R ? ? sin ? ( ? ) , wherein ? is the surface tension of the liquid, ?? is the density difference between the liquid and the atmosphere, g is the local gravitational acceleration, P is the pressure at the cross section of the droplet cut from a horizontal plane of the measurement point, R is the radius of a circular surface formed by cutting the droplet, ? is the inclination angle between the tangent line of the measurement point on the droplet and the horizontal plane, and V is the droplet volume at the lower part of the cross section of the droplet.Type: ApplicationFiled: January 22, 2020Publication date: May 12, 2022Inventors: Liping YANG, Qiu ZHONG, Jun WANG, Huidong LI, Ye TAO, Wenbing WANG, Zijun XU, Caiyun LUO
-
Patent number: 11316195Abstract: Energy storage materials, and specifically, an electrolyte and an electrochemical device, where the electrolyte includes an additive A and an additive B, the additive A is selected from 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 sulfonate compound. The electrochemical device includes the above electrolyte. The electrolyte can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, meanwhile the electrolyte can be adsorbed on catalytically active sites of the graphite surface to form a stable SEI film, thereby effectively reducing side reactions. The electrochemical device using the electrolyte has good high temperature and high voltage cycle performance and storage performance.Type: GrantFiled: July 18, 2017Date of Patent: April 26, 2022Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Zijun Xu, Chunhua Hu, Tiancheng Yi, Yingjie Zhan, Chengdu Liang
-
Patent number: 11239497Abstract: 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: GrantFiled: March 30, 2019Date of Patent: February 1, 2022Assignee: Contemporary Amperex Technology Co., LimitedInventors: Tiancheng Yi, Chunhua Hu, Lu Miao, Zijun Xu, Chengdu Liang
-
Patent number: 11121406Abstract: 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: GrantFiled: March 19, 2019Date of Patent: September 14, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Shushi Dou, Chunhua Hu, Tiancheng Yi, Zijun Xu, Chengdu Liang
-
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
-
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
-
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
-
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
-
Publication number: 20190267670Abstract: Energy storage materials, and specifically, an electrolyte and an electrochemical device, where the electrolyte includes an additive A and an additive B, the additive A is selected from 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 sulfonate compound. The electrochemical device includes the above electrolyte. The electrolyte can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, meanwhile the electrolyte can be adsorbed on catalytically active sites of the graphite surface to form a stable SEI film, thereby effectively reducing side reactions. The electrochemical device using the electrolyte has good high temperature and high voltage cycle performance and storage performance.Type: ApplicationFiled: July 18, 2017Publication date: August 29, 2019Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Zijun XU, Chunhua HU, Tiancheng YI, Yingjie ZHAN, Chengdu LIANG