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Polymer gel electrolyte, lithium cell adopting said electrolytre and method for producing said electrolyte

A gel electrolyte and polymer technology, applied in the direction of non-aqueous electrolyte battery, electrolyte battery manufacturing, lithium battery, etc., can solve the problems of affecting battery performance, difficulty in making lithium battery, low capacity, etc.

Inactive Publication Date: 2002-08-07
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, it is quite difficult to fabricate the above-mentioned lithium storage battery
Moreover, due to the low content of the electrolyte, the ionic conductivity between the cathode and anode electrodes deteriorates, which in turn affects the performance of the battery, such as low capacity due to high-speed charge / discharge characteristics

Method used

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  • Polymer gel electrolyte, lithium cell adopting said electrolytre and method for producing said electrolyte
  • Polymer gel electrolyte, lithium cell adopting said electrolytre and method for producing said electrolyte
  • Polymer gel electrolyte, lithium cell adopting said electrolytre and method for producing said electrolyte

Examples

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Effect test

Embodiment 1

[0060] 94 parts by weight LiCoO 2 , 3 parts by weight of Super-P and 3 parts by weight of polyvinylidene fluoride (PVDF) were dissolved in 80 parts by weight of N-methyl-2-pyrrolidone to prepare a cathode active material slurry. This cathode active material slurry was coated on an aluminum (Al) foil having a width of 4.9 cm and a thickness of 147 µm, followed by drying, pressing and chipping into a predetermined shape, whereby a cathode was prepared.

[0061] 89.8 parts by weight of mezophase carbon fiber (MFC) (Petoca Ltd., Japan), 0.2 parts by weight of oxalic acid and 10 parts by weight of PVDF are dissolved in 120 parts by weight of N-methyl-2-pyrrolidone to make anode active material slurry . This anode active material slurry was coated on a copper foil having a width of 5.1 cm and a thickness of 178 µm, followed by drying, pressing and chipping into a predetermined shape, whereby an anode was produced.

[0062] A polyethylene separator (Asahi Chemical Industry Co., Ltd...

Embodiment 2

[0066] Lithium accumulators were prepared in the same manner as in Example 1, except that during the preparation of the polymer electrolyte precursor, 91 grams of 1.15M LiPF were used 6 , an electrolyte solution (Ube Industries, Ltd.) with a weight ratio of EC:DMC:DEC in the mixture of 3:3:4, and 6 g of polyethylene glycol dimethacrylate was used.

[0067] A lithium storage battery was fabricated in the same manner as in Example 1, except that 0.1 g of N,N-(1,4-phenylene)bismaleimide was further added to the polymer electrolyte precursor.

Embodiment 4

[0069] A lithium storage battery was fabricated in the same manner as in Example 1, except that a polyethylene separator (Asahi Chemical Industry Co., Ltd.) with a width of 5.35 cm, a thickness of 18 μm, and a porosity of 60% was inserted between the cathode and the anode, and The electrode devices are formed by lamination.

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Abstract

The lithium secondary battery comprises a cathode, an anode, and the separator, wherein the separator is a framework-structured insulating resin sheet containing the gel-type polymer electrolyte in the framework-structure. The gel-type polymer electrolyte is produced by polymerizing a precursor comprising a polymer having a repeating unit represented by the formula 1, a crosslinking agent represented by the formula 2, and an electrolyte solution comprising lithium salts and a non-aqueous solvent. In the formula, x is 0.1-0.6, y is 0.1-0.8, z is 0.1-0.8, R is C1-C6 alkyl, and n is 3-30.

Description

technical field [0001] The present invention relates to a kind of polymer gel electrolyte and the lithium battery that adopts this electrolyte, more particularly, the present invention relates to the polymer gel electrolyte that produces by polymerization in battery, and the method for producing this polymer gel electrolyte method, the present invention also relates to a lithium battery having improved high-speed charge / discharge characteristics by using a separator containing such a polymer gel electrolyte, and a method of producing such a lithium battery. Background technique [0002] Lithium batteries use liquid or solid electrolytes, especially polymer electrolytes. Since the lithium battery uses a polymer electrolyte, the equipment will not be damaged due to the leakage of the electrolyte, and the electrolyte itself acts as a separator to miniaturize the battery and realize a high-energy-density battery. Due to these advantages, lithium secondary b...

Claims

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Application Information

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IPC IPC(8): C08F290/14C08F299/02H01B1/12H01M2/16H01M2/18H01M10/05H01M10/052H01M10/0565H01M10/058
CPCY02E60/122H01M10/0565H01M10/052Y02E60/10Y02P70/50H01M10/0525H01M10/058
Inventor 卢亨坤金基昊
Owner SAMSUNG SDI CO LTD
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