ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE INCLUDING SAME

    公开(公告)号:US20250158128A1

    公开(公告)日:2025-05-15

    申请号:US19006912

    申请日:2024-12-31

    Abstract: An electrochemical device includes a positive electrode plate, a negative electrode plate and an electrolyte, where the positive electrode plate includes a positive electrode active material layer, and the negative electrode plate includes a negative electrode active material layer. Observed along a thickness direction of the electrochemical device, in a width direction of the negative electrode plate, the negative electrode active material layer includes two protruding regions not overlapping with the positive electrode active material layer on two sides, and a width M mm of the protruding region is 0.5 mm to 2 mm. The electrolyte includes a polynitrile compound, and the polynitrile compound includes a compound represented by formula I-A. Based on a mass of the electrolyte, a mass percentage N % of the polynitrile compound is 0.01% to 8%. 0.01≤M×N

    ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE INCLUDING SAME

    公开(公告)号:US20220336855A1

    公开(公告)日:2022-10-20

    申请号:US17709650

    申请日:2022-03-31

    Abstract: An electrochemical device including an electrolyte. The electrolyte includes a non-fluorinated cyclic carbonate and an ether multi-nitrile compound. The non-fluorinated cyclic carbonate includes ethylene carbonate. Based on a mass of the electrolyte, a content of the ethylene carbonate is X %, and a content of the ether multi-nitrile compound is A %. The electrochemical device further includes a positive electrode. The positive electrode includes a positive electrode active material layer and a positive current collector. The positive electrode active material layer includes a positive electrode active material. The positive electrode active material includes an element M. The element M includes at least one of Al, Mg, Ti, Zr, or W. Based on a mass of the positive electrode active material, a content of the element M is C ppm, 1000≤C≤22000, X+A≤15, and 133≤C/A≤22000.

    ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS CONTAINING SAME

    公开(公告)号:US20250158130A1

    公开(公告)日:2025-05-15

    申请号:US19019945

    申请日:2025-01-14

    Abstract: An electrochemical apparatus includes an electrolyte, a positive electrode, and a negative electrode. The negative electrode includes a negative active material layer, the negative active material layer includes a negative active material, the electrolyte includes fluoroethylene carbonate, and the electrochemical apparatus satisfies 0.005≤A/B≤0.1; where a mass of the fluoroethylene carbonate corresponding to 1 g of the negative active material is A g, and a specific surface area of the negative active material is B m2/g. This application aims to improve the fast charging performance of the electrochemical apparatus while maintaining the cycle performance thereof.

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