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Lithium secondary battery and non-aqueous electrolyte used in the lithium secondary battery

A technology of lithium secondary battery and non-aqueous electrolyte, which is applied in the field of high output lithium secondary battery and longevity, and can solve the problem of not being able to obtain output

Inactive Publication Date: 2015-07-01
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 battery and non-aqueous electrolyte used in the lithium secondary battery
  • Lithium secondary battery and non-aqueous electrolyte used in the lithium secondary battery
  • Lithium secondary battery and non-aqueous electrolyte used in the lithium secondary battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0797] 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

[1988] Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples unless the gist of the present invention is exceeded.

[1989] Positive electrode [1] [positive electrode active material]

[1990] The types and physical properties of the positive electrode active materials used in the following Examples and Comparative Examples are as follows.

[1991] Positive [1] Table 1

[1992] [Table 1]

[1993]

[1994] Positive electrode [1] In Table 1, as the physical properties of the positive electrode active material, the BET specific surface area, the average primary particle size (measured by SEM), and the median particle size d were measured according to the methods described above. 50 , Determination of tap density.

[1995] [Positive active material A]

[1996] The positive electrode active material A is a lithium transition metal composite oxide synt...

Embodiment 2

[2024] It carried out similarly to positive electrode [1] Example 1 except having made electrolytic solution contain 0.3 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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PUM

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Abstract

A lithium secondary battery comprising: a positive electrode and a negative electrode which each has a specific composition and specific properties; and a nonaqueous electrolyte which contains a cyclic siloxane compound represented by general formula (1), fluorosilane compound represented by general formula (2), compound represented by general formula (3), compound having an S-F bond in the molecule, nitric acid salt, nitrous acid salt, monofluorophosphoric acid salt, difluorophosphoric acid salt, acetic acid salt, or propionic acid salt in an amount of 10 ppm or more of the whole nonaqueous electrolyte. This lithium secondary battery has a high capacity, long life, and high output. [In general formula (1), R 1 and R 2 are an organic group having 1-12 carbon atoms and n is an integer of 3-10. In general formula (2), R 3 to R 5 are an organic group having 1-12 carbon atoms; x is an integer of 1-3; and p, q, and r each are an integer of 0-3, provided that 1‰ p+q+r‰ 3. In general formula (3), R 6 to R 8 are an organic group having 1-12 carbon atoms and symbol 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 an application with an application date of October 19, 2006, an application number of 201210427884.X, and an invention title of "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 electrolyte solution used therein, and more particularly, to a non-aqueous electrolyte solution for a lithium secondary battery having a specific composition and a non-aqueous electrolyte solution having a specific composition and physical properties capable of occluding and releasing lithium The positive and negative electrodes, and in particular, lithium secondary batteries excellent in low-temperature discharge characteristics, high capacity, long life, high output, and non-aqueous electrolytes used therein. Background technique [0003] In recent years, along with the miniaturization of electronic devices, there has been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M10/056H01M10/058H01M4/02H01M4/131H01M4/133H01M4/134H01M4/48H01M4/485H01M4/50H01M4/505H01M4/52H01M4/525H01M4/58H01M4/587H01M10/052H01M10/0525H01M10/0566H01M10/0567H01M10/0568H01M10/0569H01M10/36H01M50/119H01M50/121
CPCH01M4/131Y02E60/122H01M10/0567H01M10/0569H01M10/0568H01M4/364H01M4/133H01M10/052H01M2004/021H01M4/134Y02T10/7011H01M2300/0025H01M10/058H01M50/119H01M50/121H01M4/587H01M10/0525H01M10/0587H01M2220/20H01M2300/004H01M4/525Y02E60/10Y02T10/70Y02P70/50B60L50/64H01M50/46H01M50/124H01M2300/0034H01M10/613H01M10/625H01M4/505H01M4/583H01M4/0428H01M4/0471H01M4/1391H01M4/1393H01M4/485H01M2004/027
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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