Nonaqueous electrolyte solution and nonaqueous electrolyte battery

Abstract

Nonaqueous electrolytes capable of providing a battery having a high capacity and excellent in storability and cycle characteristics are provided. Also provided are nonaqueous-electrolyte batteries produced with the electrolytes. The nonaqueous electrolytes include ones which (1) contains a cyclic carbonate having an unsaturated bond and further contains a fluorinated cyclic carbonate having two or more fluorine atoms, (2) contains an aromatic compound having 7-18 carbon atoms in total and further contains a fluorinated cyclic carbonate having two or more fluorine atoms, (3) contains diethyl carbonate and further contains a fluorinated cyclic carbonate having two or more fluorine atoms, or (4) contains at least one compound selected from the group consisting of cyclic sulfonic acid ester compounds, di-sulfonic acid ester compounds, nitrile compounds, and compounds represented by general formula (1) and further contains a fluorinated cyclic carbonate having two or more fluorine atoms. The electrolytes further include (5) a nonaqueous electrolyte characterized by being an electrolytic solution for use in a high-voltage battery having a final charge voltage of 4.3 V or higher and containing a fluorinated cyclic carbonate having two or more fluorine atoms.

Description

[0001] This application is a divisional application of an application with a filing date of May 31, 2007, an application number of 201110138119.1, and an invention title of "Nonaqueous Electrolyte and Nonaqueous Electrolyte Battery". technical field [0002] The present invention relates to a nonaqueous electrolytic solution and a nonaqueous electrolytic battery using the nonaqueous electrolytic solution. Background technique [0003] Non-aqueous electrolyte batteries such as lithium secondary batteries are being put into practical use in a wide range of applications ranging from so-called consumer power supplies such as mobile phones and notebook computers to vehicle-mounted power supplies for driving vehicles. However, in recent years, there has been an increasing demand for higher performance of non-aqueous electrolyte batteries, and improvements in battery characteristics have been eagerly desired. [0004] An electrolytic solution used in a nonaqueous electrolyte batter...

AI Technical Summary

Problems solved by technology

However, the following problems are likely to occur: the active material layer of the electrode is pressurized to increase the density, the amount of electrolyte solution is reduced, and the active material cannot be used uniformly, and a part of lithium is precipitated or accelerated due to uneven reaction. Deterioration of the active material prevents sufficient characteristics from being obtained, and non-aqueous electrolyte secondary batteries using the electrolyte solutions described in Patent Documents 1 to 5 are not satisfactory in terms of both cycle characteristics and high-temperature storage characteristics.

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