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Polymer gel electrolyte and polymer secondary battery using the same

A gel electrolyte and polymer technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as poor rate characteristics and cycle characteristics, and achieve excellent expansion suppression effects, suppression of gas generation, and suppression of resistance increase Effect

Inactive Publication Date: 2007-09-12
NEC ENERGY DEVICES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Lithium polymer batteries have poor rate characteristics (レ-ト characteristic) and cycle characteristics compared with general batteries using liquid electrolytes.

Method used

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  • Polymer gel electrolyte and polymer secondary battery using the same
  • Polymer gel electrolyte and polymer secondary battery using the same
  • Polymer gel electrolyte and polymer secondary battery using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0083] Fabrication of Test Batteries

[0084] The fabrication of the positive electrode will be described with reference to FIG. 1 . 85% by mass LiMn 2 o 4 , 7% by mass of acetylene black as a conductive auxiliary material, and 8% by mass of polyvinylidene fluoride as a binder were mixed, N-methylpyrrolidone was added to the mixture, and further mixed to prepare a positive electrode slurry. This was applied to both sides of the aluminum foil 2 having a thickness of 20 μm as a current collector by a doctor blade method so that the thickness after rolling treatment was 160 μm to form a positive electrode active material coating portion 3 . In addition, a positive electrode active material uncoated part 4 that is not coated with a positive electrode active material on either side is provided at both ends, and a positive electrode conductive sheet 6 is arranged on one of the positive electrode active material uncoated parts 4, and a positive electrode conductive sheet 6 is set a...

Embodiment 1-2

[0097] Except having added 0.05 parts by mass of 1,3-propane sultone, a test cell of sample 1-2 was prepared in the same manner as in Example 1-1, and evaluated in the same manner as in Example 1-1. The results are shown in Table 1.

Embodiment 1-3

[0099] Except for adding 0.5 parts by mass of 1,3-propane sultone, a test cell of Sample 1-3 was prepared in the same manner as in Example 1-1, and evaluated in the same manner as in Example 1-1. The results are shown in Table 1.

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Abstract

A polymer gel electrolyte, comprising a polymer gel including an aprotic organic solvent, a carrier salt and a sulfur-containing organic compound having at least one -O-SO2- in its chemical structure, for instance, a straight-chain sulfonic acid ester or a cyclic sulfonic acid ester, and a lithium polymer secondary battery using the polymer gel electrolyte and having improved rate performance and cycle performance.

Description

[0001] Referenced related applications [0002] This application is based on and claims priority from prior Japanese Patent Applications No. 2006-64049 (filing date March 9, 2006) and No. 2006-346345 (filing date December 22, 2006), which are incorporated in their entirety This application is incorporated by reference. technical field [0003] The present invention relates to a polymer gel electrolyte containing an aprotic solvent, a supporting salt and a sulfur-containing organic compound and a polymer secondary battery using the polymer gel electrolyte. Background technique [0004] Lithium polymer batteries are attracting attention as power sources for portable devices because they can be thinned, have a high degree of freedom in shape selection, and do not use an electrolyte, so there is no possibility of electrolyte leakage. Recently, along with the increase in the functions of portable devices, an increase in energy density and the like are required, thereby also requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/08C08K5/42C08K5/45H01M10/40H01M10/0525H01M10/0565
CPCY02E60/122Y02E60/10
Inventor 石田纯一河野安孝宇津木功二石川仁志小林广司金子志奈子
Owner NEC ENERGY DEVICES LTD
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