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Nonaqueous electrolytic solution and nonaqueous electrolytic solution secondary battery using same

Inactive Publication Date: 2013-11-21
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a nonaqueous electrolytic solution with desirable characteristics such as low-temperature discharge and cycle characteristics. Furthermore, it also provides a nonaqueous electrolytic solution secondary battery that uses this solution.

Problems solved by technology

However, while containing these compounds provides some effect of improving storage characteristics and cycle characteristics, they form a high-resistance coating on the negative electrode side and lower the low-temperature discharge characteristics.

Method used

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  • Nonaqueous electrolytic solution and nonaqueous electrolytic solution secondary battery using same
  • Nonaqueous electrolytic solution and nonaqueous electrolytic solution secondary battery using same
  • Nonaqueous electrolytic solution and nonaqueous electrolytic solution secondary battery using same

Examples

Experimental program
Comparison scheme
Effect test

example 1-1

[0461]Sufficiently dried LiPF6 was dissolved in a mixture of ethylene carbonate, dimethyl carbonate, and ethyl methyl carbonate (volume ratio 3:3:4) under dry argon atmosphere in 1 mol / L of the total amount of the nonaqueous electrolytic solution (the electrolytic solution is also referred to as “reference electrolytic solution”). A specific Si compound (a) and a compound (B3) were added to the reference electrolytic solution in 0.5 mass % each with respect to the total amount of the nonaqueous electrolytic solution. The nonaqueous electrolytic solution so prepared was used to produce a battery using the foregoing methods, and the battery was measured for initial low-temperature discharge characteristic, cycle characteristic, and post-cycle low-temperature discharge characteristic. The results are presented in Table 1 as ratios with respect to the results obtained in Reference Example 10-1.

example 1-2

[0462]An electrolytic solution was produced in the same manner as in Example 1-1, except that a compound (B5) was added to the electrolytic solution in 0.2 mass % instead of compound (B3). A battery was produced in the same manner as in Example 1-1, and was evaluated with respect to initial low-temperature discharge characteristic, cycle characteristic, and post-cycle low-temperature discharge characteristic. The results are presented in Table 1 as ratios with respect to the results obtained in Reference Example 1-10.

example 1-3

[0463]An electrolytic solution was produced in the same manner as in Example 1-1, except that a compound (B9) was added to the electrolytic solution in 0.5 mass % instead of compound (B3). A battery was produced in the same manner as in Example 1-1, and was evaluated with respect to initial low-temperature discharge characteristic, cycle characteristic, and post-cycle low-temperature discharge characteristic. The results are presented in Table 1 as ratios with respect to the results obtained in Reference Example 1-10.

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Abstract

The present invention relates to a nonaqueous electrolytic solution for use in a nonaqueous electrolytic solution secondary battery that comprises a negative electrode and a positive electrode capable of storing and releasing metal ions, and a nonaqueous electrolytic solution, wherein the nonaqueous electrolytic solution contains the specific compounds (A) and (B).

Description

TECHNICAL FIELD[0001]The present invention relates to nonaqueous electrolytic solutions, and nonaqueous electrolytic solution secondary batteries using same, specifically to nonaqueous electrolytic solutions containing specific components and for use in lithium secondary batteries, and to lithium secondary batteries using such nonaqueous electrolytic solutions.BACKGROUND ART[0002]There has been increasing demands for higher capacity secondary batteries in response to miniaturization of electronic devices driven by rapidly advancing development in the industry. This has prompted development of the lithium secondary batteries having higher energy density than nickel-cadmium batteries and nickel-hydrogen batteries. There has also been repeated effort for improving performance.[0003]Against the background of increasing global challenges such as environmental and energy problems, there are high expectations for the application of lithium secondary batteries to large power supplies such a...

Claims

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Application Information

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IPC IPC(8): H01M10/056H01M10/052
CPCH01M10/056H01M10/052H01M10/0525H01M10/0567H01M4/587H01M4/386H01M4/505H01M4/525H01M10/0569H01M10/0568Y02E60/10H01M10/054H01M2300/004
Inventor YOSHIDA, HIROAKISHIGEMATSU, YASUYUKIKOTATO, MINORU
Owner MITSUBISHI CHEM CORP