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公开(公告)号：US20200161659A1
公开(公告)日：2020-05-21
申请号：US16426867
申请日：2019-05-30
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Wei Li , Haihao Shi , Huihui Liu , Chao Jin , Jianbao Xu , Shisong Li , Chao Guo
Abstract: The present invention relates to a positive electrode plate and an electrochemical device. The positive electrode plate includes a current collector, a positive active material layer, and a binding layer disposed between the current collector and the positive active material layer, the binding layer comprising a polymer material, a conductive material, and an inorganic filler, wherein the polymer material comprises a binding layer matrix and the binding layer matrix is an oil-dispersible polymer material having a solubility in NMP at 130 ° C. for 5 minutes, which is 30% or less of the solubility of PVDF under the same conditions. The positive electrode plate can improve the safety performance of the electrochemical device (for example, a capacitor, a primary battery, a secondary battery, or the like) under abnormal conditions such as nailing penetration.
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公开(公告)号：US11211610B2
公开(公告)日：2021-12-28
申请号：US16426867
申请日：2019-05-30
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Wei Li , Haihao Shi , Huihui Liu , Chao Jin , Jianbao Xu , Shisong Li , Chao Guo
Abstract: The present application relates to a positive electrode plate and an electrochemical device. The positive electrode plate includes a current collector, a positive active material layer, and a binding layer disposed between the current collector and the positive active material layer, the binding layer comprising a polymer material, a conductive material, and an inorganic filler, wherein the polymer material comprises a binding layer matrix and the binding layer matrix is an oil-dispersible polymer material having a solubility in NMP at 130° C. for 5 minutes, which is 30% or less of the solubility of PVDF under the same conditions. The positive electrode plate can improve the safety performance of the electrochemical device (for example, a capacitor, a primary battery, a secondary battery, or the like) under abnormal conditions such as nailing penetration.
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公开(公告)号：US11050053B2
公开(公告)日：2021-06-29
申请号：US16422872
申请日：2019-05-24
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Wei Li , Haihao Shi , Huihui Liu , Chao Jin , Tianyi Gao , Jianbao Xu , Shisong Li , Chao Guo
Abstract: The present invention relates to a battery, comprising a positive electrode plate, a separator and a negative electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and at least two layers of positive active materials on at least one surface of the positive electrode current collector in which the underlying positive active material layer in contact with the positive electrode current collector comprises a first positive active material, a first polymer material, and a first conductive material and in which the upper positive active material layer comprises a second positive active material, a second polymer material, and a second conductive material and the first polymer material comprises an oil-dispersible polymer material having a solubility in NMP at 130° C. for 5 minutes, which is 30% or less of the solubility of PVDF under the same conditions. The battery exhibits good safety performance and improved electrical performance.
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