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Lithium storage battery

A lithium battery and current collector technology, applied in the field of lithium batteries, can solve the problems of destroying battery performance and cycle life characteristics, affecting the uniform electrode reaction of the electrode surface, etc.

Inactive Publication Date: 2005-10-05
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this film on the lithium electrode surface also affects the uniform electrode reaction across the entire electrode surface, thereby destroying the performance and cycle life characteristics of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Metal lithium was melted in an inert atmosphere (Ar) at 250° C. and an atmosphere free of moisture and oxygen to make liquid lithium. Liquid lithium was coated onto a preheated Al-sprayed nickel current collector with a preheated doctor blade to fabricate a cathode with a lithium coating of approximately 250 μm thickness.

[0023] A polyvinyl acrylate adhesive was dissolved in an acrylonitrile solvent to make an adhesive solution. Add carbon powder conductive agent to the binder solution and let it disperse. After this, elemental sulfur (S 8 ) powder was added to the obtained mixture and stirred with a mushroom machine for 1 day to prepare an anode active material slurry. At this time, S 8 : binder: conductive agent is 60:20:20wt%.

[0024] The resulting slurry was coated onto a carbon-coated Al substrate and dried in a drying oven at 80°C for 1 hour. The dried material was then pressed to a thickness of 50 µm by a roller press to produce an anode.

[0025] The an...

Embodiment 2

[0027] The strip of bare nickel foil coming out of the continuous roll is passed through the molten lithium tank by means of guide rolls embedded in the molten lithium tank, and emerges from the molten lithium tank as a matrix foil, passing a doctor blade to control its thickness, and then cooling below the melting point of lithium. As a result, a cathode plate was obtained.

[0028] A lithium-sulfur battery was fabricated by using the cathode plate by the same method as in Example 1.

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Abstract

A lithium battery including a lithium negative electrode, a positive electrode, a separator and an electrolyte. The lithium negative electrode is prepared by melting lithium metal under an inert gas atmosphere to prepare a liquid lithium metal and coating the liquid lithium metal on a current collector. The positive electrode includes a positive active material, an electrically conductive material, and a binder. The separator is placed between the positive and the negative electrodes, and the electrolyte is immersed in the positive and negative electrodes and separator, and includes a lithium salt and organic solvents.

Description

[0001] Related literature [0002] This application is based on Application No. 2000-32515 filed with the Korean Industrial Property Office on June 13, 2000, the contents of which are incorporated herein by reference. Background of the invention [0003] (a) Field of Invention [0004] The present invention relates to lithium accumulators, and more precisely to lithium accumulators having electrodes uniformly coated with active material. [0005] (b) Description of related technology [0006] Lithium-sulfur batteries use sulfur-based compounds as the anode active material, and lithium metal, its alloys, or carbon-based compounds as the cathode active material. In the cathode, lithium metal is deposited during charging and reoxidized to lithium ions during discharging. Carbon-based compounds are compounds capable of doping in or out of alkali metals such as lithium or metal ions such as lithium ions. Lithium-sulfur batteries u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66H01M4/13H01M4/134H01M4/136H01M4/1395H01M4/40H01M4/58H01M4/62H01M6/16H01M10/05H01M10/052H01M10/0566H01M10/39
CPCH01M10/0587H01M4/134H01M2004/027H01M4/382H01M4/0409H01M4/0483H01M2300/0042H01M10/052H01M4/5815H01M4/661H01M4/1395H01M4/0404C22C24/00H01M4/136H01M4/0435H01M4/581Y10T29/49115H01M4/40Y02E60/122Y02E60/10Y02P70/50H01M4/58H01M4/62
Inventor 崔允硕
Owner SAMSUNG SDI CO LTD