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Lithium secondary cell

A lithium secondary battery and non-aqueous electrolyte technology, which is applied in secondary batteries, primary batteries, lithium storage batteries, etc., can solve the problems of inability to obtain storage characteristics, and achieve the effect of improving storage characteristics and inhibiting reactions

Inactive Publication Date: 2004-12-01
FDK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although various electrolyte solutions have been studied as electrolyte solutions for lithium secondary batteries, sufficient storage characteristics cannot be obtained.

Method used

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  • Lithium secondary cell

Examples

Experimental program
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Effect test

Embodiment 1-1

[0024] [making of positive electrode]

[0025] The spinel-structured lithium manganese oxide (LiMn 2 o 4 ) (powder), carbon black (powder) as a conductive agent, and fluororesin (powder) as a binder were mixed at a weight ratio of 85:10:5 to prepare a positive electrode mixture. This positive electrode mixture was molded into a disc shape, and dried in vacuum at 250° C. for 2 hours to obtain a positive electrode.

[0026] [Production of Negative Electrode]

[0027] A lithium-aluminum-manganese (Li-Al-Mn) alloy was prepared by electrochemically intercalating lithium into an aluminum-manganese (Al-Mn) alloy having a manganese content of 1% by weight. Lithium was intercalated in an amount equivalent to 100 mAh / g. This alloy was punched out into a disc shape to obtain a negative electrode.

[0028] [Preparation of non-aqueous electrolyte solution]

[0029] In a separate solvent of diethylene glycol dimethyl ether (Di-DME), lithium bis(trifluoromethylsulfonyl)imide (LiN(CF 3...

Embodiment 1-2

[0035] Battery A2 of the present invention was assembled in the same manner as in Example 1-1 except that a nonwoven fabric made of quartz glass fiber was used as the separator.

Embodiment 1-3

[0037] Inventive battery A3 was assembled in the same manner as in Example 1-1, except that a nonwoven fabric made of sodium glass fiber was used as the separator.

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Abstract

A lithium secondary battery including a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte including a solute and a solvent, wherein the separator is made of glass fibers and the negative electrode includes a lithium-aluminum-manganese alloy as an active material.

Description

technical field [0001] The present invention relates to a lithium secondary battery, in particular to a lithium secondary battery suitable for a reflow battery mounted on a printed substrate by reflow soldering. Background technique [0002] The memory backup (memory back-up) lithium secondary battery is to first apply solder or the like on the part to be welded, and make it pass through a reflow furnace at about 200 to 270 ° C to melt the solder and then perform welding. The reflow soldering mounts on printed substrates. [0003] In such a reflow battery, since heat resistance is required, heat-resistant electrodes, electrolyte solutions, separators, and the like are used (Patent Document 1, etc.). [0004] [Patent Document 1] [0005] Japanese Patent Application Publication No. 2001-148242 [0006] In the reflow battery for memory backup as described above, there has been a problem that storage characteristics are not sufficient due to improvements in performance and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M4/40H01M6/16H01M10/05H01M10/052H01M10/0568H01M10/0569
CPCY02E60/122H01M4/0461H01M10/0568Y02E60/12H01M10/052H01M6/166H01M4/405H01M4/40Y02E60/10H01M50/437H01M10/0569H01M10/058H01M2300/0028
Inventor 吉村精司井町直希最相圭司竹内正信
Owner FDK CORP
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