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Battery

A battery and non-aqueous electrolyte technology, applied in secondary batteries, lithium batteries, circuits, etc., can solve problems such as easy decomposition, insufficient capacity, unstable acid anhydride, etc., achieve decomposition inhibition, and improve high-temperature storage characteristics.

Active Publication Date: 2015-07-15
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, it has been noticed that the anhydrides containing sulfonic acid groups are unstable and easy to decompose, so that in the existing electrolytes, their capabilities are not fully realized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1 to 1-20 and comparative example 1-1 to 1-13

[0285] First, the positive electrode 21 is prepared. That is, lithium carbonate (Li 2 CO 3 ) and cobalt carbonate (CoCO 3 ) were mixed at a molar ratio of 0.5:1, followed by firing in air at 900°C for 5 hours to obtain a lithium-cobalt composite oxide (LiCoO 2 ). Next, 91 parts by mass of lithium cobalt composite oxide as a positive electrode active material, 6 parts by mass of graphite as a conductive agent, and 3 parts by mass of polyvinylidene fluoride as a positive electrode binder are mixed to form a positive electrode mixture, It was then dispersed in N-methyl-2-pyrrolidone to prepare a paste-like cathode mixture slurry. Finally, the positive electrode mixture slurry was coated on both sides of a positive electrode current collector 21A made of strip-shaped aluminum foil (thickness: 12 μm), dried, and then press-molded by a roll press to form a positive electrode active material layer. 21B. After that, a cathode lead 25 made of aluminum was mounted on one end of th...

reference example 1-1

[0289] Reference example 1-1 to 1-3

[0290] Batteries were prepared in the same manner as in Examples 1-6 to 1-8, but changing the content of water to 1,000 ppm, and then evaluated in the same manner.

[0291] The results are shown in Table 1.

[0292] Table 1

[0293]

[0294]

Embodiment 2-1 to 2-32

[0296] Each battery was prepared in the same manner, but using tPB as shown in Table 2 as the aromatic compound and changing the content of sulfonic anhydride and the content of water, and then evaluated in the same manner. The results are shown in Table 2. The above comparative example is also shown. Also, Examples 2-7 and Examples 2-23 are the same as Examples 1-7 and Examples 1-11, respectively.

[0297] Table 2

[0298]

[0299]

[0300] As shown in Table 2, the content of sulfonic anhydride and the content of water are preferably 0.1% by mass to 1% by mass and not more than 20 ppm, respectively.

[0301] Example 3-1 to 3-20, comparative example 3-1 to 3-12 and reference example 3-1 to 3-3

[0302] The secondary batteries of Examples 3-1 to 3-20, Comparative Examples 3-1 to 3-12, and Reference Examples 3-1 to 3-3 were prepared in the same manner as in Example 2-1 according to Table 3, but An anode prepared by using silicon as an anode active material in th...

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Abstract

A battery includes: a positive electrode; a negative electrode; a nonaqueous electrolyte; and a separator, wherein the nonaqueous electrolyte contains at least one sulfonic anhydride selected from the group consisting of compounds represented by the following chemical formulae (1) to (4) and an aromatic compound represented by the following chemical formula (5).

Description

[0001] This application is a divisional application of a patent application with an application date of January 28, 2010, an application number of 201010111642.0, and an invention title of "battery". [0002] References to related applications [0003] The present invention contains subject matter related to Japanese Patent Application JP 2009-018095 filed in the Japan Patent Office on Jan. 29, 2009, the entire content of which is hereby incorporated by reference. technical field [0004] The present invention relates to a nonaqueous electrolyte secondary battery. Background technique [0005] In recent years, portable electronic devices such as camera-integrated VTRs (Video Tape Recorders), mobile phones, and laptop personal computers have spread widely, and there are strong demands for reducing their size and weight and achieving their long life. Along with this, as a power source, batteries, especially light-weight secondary batteries capable of providing high energy den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0568
CPCH01M10/0568Y02E60/122H01M10/0567H01M10/052H01M10/0525H01M2300/0025Y02E60/10Y02P70/50
Inventor 小谷徹洼田忠彦
Owner MURATA MFG CO LTD
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