CURRENT COLLECTOR, ELECTROCHEMICAL DEVICE CONTAINING SAME, AND ELECTRONIC DEVICE

    公开(公告)号:US20230136622A1

    公开(公告)日:2023-05-04

    申请号:US18090086

    申请日:2022-12-28

    Abstract: A current collector, an electrochemical device containing the current collector, and an electronic device. The current collector includes a polymer substrate material and a conductive material. An electron resistivity of the current collector in an X-Y in-plane direction is 10 Ω·cm to 1000 Ω·cm, and an electron resistivity of the current collector in a Z direction is 0.01 Ω·cm to 30 Ω·cm. The current collector according to this application is excellent in oxidation resistance, reduction resistance, ionic insulation, mechanical strength, thermal stability, increases the energy density of bipolar electrochemical devices, and is more cost-effective and more suitable for mass production.

    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE

    公开(公告)号:US20220223983A1

    公开(公告)日:2022-07-14

    申请号:US17709943

    申请日:2022-03-31

    Abstract: An electrochemical device including a bipolar current collector. The bipolar current collector is hermetically connected to an outer package. Cavities independent of each other are formed on two opposite sides of the bipolar current collector. Each cavity contains an electrode assembly and an electrolytic solution. An electrode active material is disposed on at least one surface of the bipolar current collector. Adjacent electrode assemblies are connected in series. The electrochemical device according to this application not only improves the safety of the electrochemical device, but the electrode active material on the surface of the bipolar current collector also participates in a reaction process in the electrochemical device, so that the electrochemical device achieves both a high-voltage output and a relatively high energy density.

    PARTITION PLATE FOR USE IN ELECTROCHEMICAL DEVICE, ELECTROCHEMICAL DEVICE, AND ELECTRONIC DEVICE

    公开(公告)号:US20220223968A1

    公开(公告)日:2022-07-14

    申请号:US17708580

    申请日:2022-03-30

    Abstract: A partition plate for use in an electrochemical device, an electrochemical device, and an electronic device are disclosed. The partition plate for use in an electrochemical device is ion-insulative and includes an intermediate layer and a sealing layer. The sealing layer is located on an upper surface and a lower surface of the intermediate layer. A material of the intermediate layer includes at least one of a carbon material, a first polymer material, or a metal material. A material of the sealing layer includes a second polymer material. A temperature at which the sealing layer starts to soften is at least 10° C. lower than a temperature at which the intermediate layer starts to soften. Three layers of superimposed composite films ensure ion insulation and sealing reliability.

    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS

    公开(公告)号:US20220223948A1

    公开(公告)日:2022-07-14

    申请号:US17709545

    申请日:2022-03-31

    Abstract: An electrochemical apparatus includes a barrier, where the barrier is hermetically connected to an outer package, standalone chambers are formed at two sides of the barrier respectively, each chamber encapsulates an electrode assembly and an electrolyte, electrode assemblies in adjacent chambers are connected in series by tabs, and the barrier includes an ion insulating layer, water permeability of the barrier is less than or equal to 10−3 g/(day·m2·Pa)/3 mm, and sealing thickness T and sealing width W of a seal between the barrier and the outer package satisfy 0.01≤T/W≤0.05. Based on the electrochemical apparatus, not only high voltage output can be achieved and a temperature rise of the electrochemical apparatus can be reduced, but also water resistance and environmental stability of the electrochemical apparatus can be improved.

    Anode, and electrochemical device and electronic device comprising same

    公开(公告)号:US11342554B2

    公开(公告)日:2022-05-24

    申请号:US16676668

    申请日:2019-11-07

    Abstract: The present application relates to an anode, and an electrochemical device and an electronic device comprising the same. Embodiments of the present application provided an anode comprising: a current collector, a first anode structure layer and a second anode structure layer. The first anode structure layer comprises a first framework material and the second anode structure layer comprises a second framework material, wherein the first anode structure layer is disposed between the current collector and the second anode structure layer, and the first framework material has a higher oxidation-reduction potential for lithium ion or electronic conductivity than the second framework material. When the anode with double-layer structure provided by the present application is charged, the space utilization ratio of the anode can be enhanced, the rate capability of the electrochemical device can be enhanced, the formation of lithium dendrites may be inhibited, and the volume change amount of the anode can be reduced, thereby enhancing the safety performance and cycle performance of the electrochemical device.

    PARTITION PLATE AND ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS INCLUDING SUCH PARTITION PLATE

    公开(公告)号:US20230125965A1

    公开(公告)日:2023-04-27

    申请号:US18088874

    申请日:2022-12-27

    Abstract: A partition plate includes a partition substrate, a positive electrode membrane, a negative electrode membrane, and an insulation layer. The positive electrode membrane and the negative electrode membrane are respectively located on two surfaces of the partition substrate. The insulation layer is disposed on the partition substrate and the insulation layer is disposed at a periphery of the positive electrode membrane. A zone surrounded by orthographic projection of an outer edge of the insulation layer on the partition substrate covers orthographic projection of the negative electrode membrane on the partition substrate. This application can improve self-discharge and safety performances of electrochemical apparatuses.

    ELECTROCHEMICAL APPARATUS AND ELECTRIC DEVICE INCLUDING SAME

    公开(公告)号:US20230261206A1

    公开(公告)日:2023-08-17

    申请号:US18128729

    申请日:2023-03-30

    Abstract: An electrochemical apparatus includes a first electrode plate, a first terminal, and a second tenninal. The first electrode plate includes a composite current collector, and the composite current collector includes a base layer, a first conductive layer, and a second conductive layer, where the first conductive layer includes a first zone and a second zone, and the first terminal and the second terminal are electrically connected to the first zone. In the electrochemical apparatus and the electric device provided in this application, a heating zone is provided on the composite current collector to connect a heating circuit, a method to introduce a heating structure is optimized, thereby effectively alleviating many problems caused by existing heating methods.

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