NON-AQUEOUS ELECTROLYTE FOR LITHIUM ION BATTERY AND LITHIUM ION BATTERY

    公开(公告)号:US20200168953A1

    公开(公告)日:2020-05-28

    申请号:US16632862

    申请日:2017-12-28

    Abstract: Provide is a non-aqueous electrolyte for lithium ion battery, comprising a compound represented by structural formula I: In formula I, R1, R2, R3 and R4 are each independently selected from hydrogen atom, fluorine atom, cyano group, hydrocarbyl group or halogenated hydrocarbyl group having 1-5 carbon atoms, oxygen-containing hydrocarbyl group having 1-5 carbon atoms, silicon-containing hydrocarbyl group having 1-5 carbon atoms, X is a —O—R5—CN group, R5 is a hydrocarbyl group or a halogenated hydrocarbyl group having 1-5 carbon atoms, m, n, z and y are integers of 0 or 1, and m+n+y+z≠0. When the non-aqueous electrolyte is used for lithium ion battery, the decomposition of electrolyte on the surface of electrode can be inhibited, and the high-temperature storage performance is improved with less gas generation and small expansion rate, therefore the high-temperature cycle performance and high-temperature storage performance of the battery are effectively improved.

    LITHIUM-ION BATTERY
    23.
    发明申请
    LITHIUM-ION BATTERY 审中-公开

    公开(公告)号:US20190305365A1

    公开(公告)日:2019-10-03

    申请号:US16316618

    申请日:2016-12-29

    Abstract: A lithium-ion battery, comprising a cathode, an anode, and a non-aqueous electrolyte; the cathode comprises a cathode active material and a metal oxide and/or metal fluoride coating which covers the surface of the cathode active material; the cathode active material is at least one of materials illustrated in general formula I or II: formula I: LixNiyM1-yO2, wherein 0.5≤x≤1.2, 0.5≤y≤1, and M is selected from at least one of Co, Mn, Al, Ti, Fe, Zn, Zr, Cr, and formula II: LikCozL1-zO2, wherein 0.5≤k≤1.2, 0.5

    Secondary Battery
    26.
    发明公开
    Secondary Battery 审中-公开

    公开(公告)号:US20240136577A1

    公开(公告)日:2024-04-25

    申请号:US18010817

    申请日:2022-11-16

    CPC classification number: H01M10/0567 H01M4/502 H01M10/4235 H01M10/0525

    Abstract: In order to solve the problem that the existing manganese-based positive electrode material battery has insufficient high-temperature cycle and high-temperature storage performances due to the dissolution of manganese ions, the present application provides a secondary battery, comprising a positive electrode, a negative electrode and a non-aqueous electrolyte, the positive electrode comprises a positive electrode material layer containing a positive electrode active material, the positive electrode active material comprises a manganese-based material, and the non-aqueous electrolyte comprises a solvent, an electrolyte salt and an additive, and the additive comprises a compound represented by structural formula 1:




    the secondary battery meets the following requirements:


    0.05≤100×W×u/(q×s)≤5;



    and 2.0 g/Ah≤W≤4.5 g/Ah, 0.05%≤u≤3.5%, 5%≤q≤65%, 10 mg/cm2≤s≤30 mg/cm2.

    The secondary battery has a high capacity retention rate in the cycle and high-temperature storage processes, and has good cycle and storage performances.

    Lithium Ion Battery
    27.
    发明公开
    Lithium Ion Battery 审中-公开

    公开(公告)号:US20240079652A1

    公开(公告)日:2024-03-07

    申请号:US18259332

    申请日:2021-12-16

    Abstract: In order to overcome the problems in existing lithium ion batteries having high compactness and high-specific-surface-area negative electrodes of serious side reactions of electrolytes and high gas production, the present invention provides a lithium ion battery, comprising a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode comprises a negative electrode material layer, the compaction density of the negative electrode material layer is greater than or equal to 1.4 g/cm3, and the negative electrode material layer comprises a negative electrode active material, and the non-aqueous electrolyte comprises a solvent, an electrolyte salt, a vinylene carbonate, a fluoroethylene carbonate, and an unsaturated phosphate represented by structural formula 1, and the electrolyte salt comprises LiPF6 and LiFSI. The lithium ion battery provided by the present invention has good cycle performance, high and low temperature storage performance, and lithium precipitation resistance.

    Non-aqueous electrolyte for lithium ion battery and lithium ion battery

    公开(公告)号:US11489190B2

    公开(公告)日:2022-11-01

    申请号:US16490900

    申请日:2017-06-22

    Abstract: In order to solve the problem of insufficient cycle performance and high-temperature storage performance of the existing non-aqueous electrolyte for lithium ion battery containing maleic anhydride copolymer, the application provides a non-aqueous electrolyte for lithium ion battery. The non-aqueous electrolyte for lithium ion battery comprises a compound A represented by formula I and a compound B represented by formula II, In formula I, R7 and R8 are independently selected from one of hydrogen atom, halogen atom, —O—R9 or aryl, wherein n is a positive integer and R9 is a C1-C4 alkyl group; In formula II, R1, R2, R3, R4, R5 and R6 are each independently selected from one of hydrogen atom, fluorine atom and C1-C5 group. The non-aqueous electrolyte for lithium ion battery provided by the invention can improve the cycle stability and high-temperature storage performance of the battery through the effections of compound A and compound B.

    NON-AQUEOUS ELECTROLYTE FOR A LITHIUM ION BATTERY AND LITHIUM ION BATTERY COMPRISING THE ELECTROLYTE

    公开(公告)号:US20220255120A1

    公开(公告)日:2022-08-11

    申请号:US17628217

    申请日:2020-07-30

    Abstract: The application provides a non-aqueous electrolyte for a lithium ion battery, including a non-aqueous organic solvent and lithium salt, and the non-aqueous electrolyte further includes one or more selected from the compounds represented by Formula 1 and Formula 2. R1, R2, R3 and R4 are each independently selected from a substituted or unsubstituted alkyl group and ether group and unsaturated hydrocarbon group, and at least one of R1, R2, R3 and R4 is the substituted or unsubstituted unsaturated hydrocarbon group, and R5 is selected from a substituted or unsubstituted alkylene group and ether group; R6, R7 and R8 are each independently selected from a substituted or unsubstituted alkyl group and ether group and unsaturated hydrocarbon group, provided that at least one of R6, R7 and R8 is the substituted or unsubstituted unsaturated hydrocarbon group. The application also provides a lithium ion battery including the non-aqueous electrolyte.

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