Electrolyte for nonaqueous secondary cell and nonaqueous secondary cell using same

Abstract

A rocking-chair nonaqueous secondary cell, in which ions other than single atom ions are used as a charge carrier and the ions move back and forth between a negative electrode and a positive electrode, can be provided by using an electrolyte for a nonaqueous secondary cell, said electrolyte containing a salt having a charge carrier comprising a molecular ion. The nonaqueous secondary cell is further provided with a positive electrode containing a positive electrode active material and a negative electrode containing a negative electrode active material. The positive electrode active material and the negative electrode active material are materials capable of being doped and undoped with molecular anions (such as conductive polymers, organic radical polymers, polymers containing a ferrocene skeleton, conductive carbon materials, and organic sulfur compounds); or, preferably, the positive electrode active material and the negative electrode active material are materials capable of being doped and undoped with molecular cations (such as inorganic active materials, redox-active molecules containing a carbonyl group, redox-active molecules containing an imine skeleton, and redox-active molecules containing a sulfur atom).

Description

technical field [0001] The present invention relates to an electrolytic solution for a nonaqueous secondary battery and a nonaqueous secondary battery using the same. Background technique [0002] Non-aqueous secondary batteries such as lithium ion secondary batteries having high energy density are widely used as power sources for notebook computers, mobile phones, and the like. In addition, in recent years, in addition to power supplies for electric tools and electric vehicles, development of power supplies for portable electronic devices such as mobile phones and notebook computers has also progressed. [0003] As such, lithium-ion secondary batteries are currently used in various power sources, but one reason for this is that since lithium ions, which are elements with the greatest ionization tendency, are used as charge carriers, the potential of the negative electrode can be lowered, and as a result, the battery The voltage becomes high. As a post-lithium ion secondar...

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Problems solved by technology

As a post-lithium ion secondary battery, there are also known non-aqueous secondary batteries using sodium ions, magnesium ions, etc. as charge carriers, but in principle, the potential of the negative electrode will not be lower than that of metal lithium, so the performance is still mostly inferior to that of lithium metal. Lithium-ion secondary batteries using lithium ions as charge carriers

[0004] In addition, in non-aqueous secondary batteries using metal ions as charge carriers such as lithium-ion secondary batteries, the generation of dendrites is one of the main disadvantages, and various strategies have been employed to suppress the generation of dendrites , but not fully resolved

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