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Lithium secondary cell and nonaqueous electrolytic solution for use therein

A non-aqueous electrolyte, lithium secondary battery technology, applied in high-output lithium secondary batteries and longevity fields, can solve problems such as inability to obtain output

Active Publication Date: 2013-02-13
MITSUBISHI CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sufficient output cannot be obtained yet, and further improvement is required

Method used

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  • Lithium secondary cell and nonaqueous electrolytic solution for use therein
  • Lithium secondary cell and nonaqueous electrolytic solution for use therein
  • Lithium secondary cell and nonaqueous electrolytic solution for use therein

Examples

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Comparison scheme
Effect test

preparation example Construction

[0796] The method for producing the above-mentioned amorphous carbonaceous material is not particularly limited as long as it does not exceed the scope of the present invention, and various methods can be mentioned. In the production of amorphous carbon, one heat treatment step is necessary, but the heat treatment may be divided into two or more times, and it is also preferable to perform various treatments before and after the heat treatment and / or in the middle of the heat treatment. The various treatments include pulverization, classification, and the above-mentioned crosslinking treatment, etc., and the pulverization and classification treatment may be performed at any one of the before, after, and intermediate stages of the heat treatment as long as it is in a solid state. The crosslinking treatment is preferably performed before or during the heat treatment. By performing these treatments, the specific surface area of ​​the negative electrode active material can be contr...

Embodiment

[1986] Hereinafter, although an Example and a comparative example are given and this invention is demonstrated more concretely, this invention is not limited to these Examples unless the summary of this invention is exceeded.

[1987] Positive electrode[1][Positive electrode active material]

[1988] The types and physical properties of positive electrode active materials used in the following Examples and Comparative Examples are as follows.

[1989] Positive electrode [1] Table 1

[1990] [Table 1]

[1991]

[1992] Positive electrode [1] In Table 1, as the physical properties of the positive electrode active material, BET specific surface area, average primary particle size (measured by SEM), median particle size d 50 , Determination of tap density.

[1993] [Positive electrode active material A]

[1994] The positive electrode active material A is a lithium transition metal composite oxide synthesized by the method shown below, with the composition formula LiMn 0.3...

Embodiment 2

[2022] The same procedure as in Example 1 of the positive electrode [1] was performed except that the electrolytic solution contained 0.3% by mass of trimethylsilyl methanesulfonate instead of hexamethylcyclotrisiloxane. The results of the battery evaluation are shown in Table 2 of the positive electrode [1].

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Abstract

A lithium secondary cell which comprises a positive electrode and a negative electrode which have a specific composition and specific properties and a nonaqueous electrolytic solution containing a cyclic siloxane compound represented by the formula (1), a fluorosilane compound represented by the formula (2), a compound represented by the formula (3), a compound having an S-F bond, a nitric acid salt, a nitrous acid salt, a monofluorophosphoric acid salt, a difluorophosphoric acid salt, an acetic acid salt, or a propionic acid salt in an amount of at least 10 ppm of the whole nonaqueous electrolytic solution. The lithium secondary cell has a high capacity, long life, and high output. In the general formula (1), R<1> and R<2> each is a C1-12 organic group; and n is an integer of 3-10. In the general formula (2), R<3> to R<5> each is a C1-12 organic group; x is an integer of 1-3; and p, q, and r each is an integer of 0-3, provided that 1=p+q+r=3. In the general formula (3), R<6> to R<8> each is a C1-12 organic group; and A is a group constituted of H, C, N, O, F, S, Si, and / or P.

Description

[0001] This application is a divisional application of the application with the filing date of October 19, 2006, the application number of 201010242620.8, and the title of the invention "Lithium secondary battery and non-aqueous electrolyte used therein". technical field [0002] The present invention relates to a lithium secondary battery and a non-aqueous electrolytic solution used therein, more specifically, to a non-aqueous electrolytic solution for a lithium secondary battery containing specific components, and a non-aqueous electrolytic solution having a specific composition and physical properties capable of occluding and releasing lithium. positive and negative electrodes, and particularly lithium secondary batteries excellent in low-temperature discharge characteristics and high in capacity, long life, and high output, and nonaqueous electrolytic solutions used therein. Background technique [0003] In recent years, along with the miniaturization of electronic equipm...

Claims

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Application Information

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IPC IPC(8): H01M10/0566H01M10/0567H01M10/0569H01M10/052H01M10/0525H01M10/058H01M4/38H01M4/485H01M4/505H01M4/525H01M4/587H01M4/134H01M4/133H01M4/131H01M4/02H01M4/48H01M4/50H01M4/52H01M4/58H01M10/0568H01M10/36H01M50/119H01M50/121
CPCY02E60/122Y02T10/7022Y02T10/7011Y02T90/16H01M10/052H01M10/0567H01M10/0569H01M10/0568H01M10/058H01M2300/0025H01M2004/021H01M4/131H01M4/133H01M4/134H01M4/364H01M50/119H01M50/121H01M4/587H01M10/0525H01M10/0587H01M2220/20H01M2300/004H01M4/525Y02E60/10Y02T10/70Y02P70/50B60L50/64H01M50/46H01M50/124H01M2300/0034H01M10/613H01M10/625H01M4/505H01M4/583H01M4/0428H01M4/0471H01M4/1391H01M4/1393H01M4/485H01M2004/027
Inventor 宫城秀和加藤竜一横沟正和宇尾野宏之松本一志佐藤智洋古田土稔中岛孝之铃木仁大岛裕之
Owner MITSUBISHI CHEM CORP
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