The invention relates to a secondary battery, a battery pack, an electrically driven vehicle and an electric power storage system. The secondary battery comprises: a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode includes a compound containing lithium and oxygen. The nonaqueous electrolyte includes at least one of anions expressed by B(XY)FR, where Xrepresents a divalent linear hydrocarbon group or the like, but the X may be absent, Y represents a cyano group or the like, R represents a monovalent fluorinated linear hydrocarbon group or the like, and x to z are each integers which satisfy the following conditions: x > 0, y >= 0, z >= 0, (x+y+z) = 4, and (y+z) > 0.

    本发明涉及二次电池、电池组、电动车辆以及电力存储系统。该二次电池包括:含锂氧的化合物的正极、负极、以及包括由式(1)表示的一种或者多种第一阴离子的非水电解液:B(XY)xFyRz‑(1),其中,X是二价链烃基、二价氟化链烃基、以及没有基团中的一种;Y是氰基(‑C≡N)和异氰基(‑N+≡C‑)中的一种;R是单价氟化链烃基和单价氟化环烃基中的一种;并且x至z是满足x>0、y≥0、z≥0、(x+y+z)=4并且(y+z)>0的整数。


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    Title :

    SECONDARY BATTERY, BATTERY PACK, ELECTRICALLY DRIVEN VEHICLE AND ELECTRIC POWER STORAGE SYSTEM


    Additional title:

    二次电池、电池组、电动车辆以及电力存储系统


    Contributors:

    Publication date :

    2020-11-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen