Lithium cell with cathode containing iron disulfide

A technology of iron disulfide and batteries, which is applied in the direction of organic electrolyte batteries, primary batteries, battery electrodes, etc. It can solve the problems of non-functional batteries and impractical commercial use of batteries, and achieve good conductivity and low viscosity.

Inactive Publication Date: 2011-05-18
THE GILLETTE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is not to say that many combinations of lithium salts with organic solvents cannot give Li / FeS that is completely nonfunctional 2 Battery
However, the challenge associated with using such batteries with electrolytes formed using only any known combination of lithium salts and organic solvents is that the problems encountered would likely be intractable, thus making the batteries impractical for commercial use

Method used

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  • Lithium cell with cathode containing iron disulfide
  • Lithium cell with cathode containing iron disulfide
  • Lithium cell with cathode containing iron disulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0089] Comparative and experimental tests have included FeS 2 The cathode of the lithium coin cell

[0090] Comparison and experimental testing of Li / FeS 2 Coin cell battery 100 ( Figure 1A ) is prepared as follows:

[0091] Comparison and Experimental Testing of Coin Cell Assemblies:

[0092] The coin-shaped aluminized steel cathode casing 130 and the coin-shaped nickel-plated steel anode casing 120 are made of Figure 1A A similar configuration as shown in was formed. The finished battery 100 has a maximum diameter of about 20 mm and a thickness of about 3 mm. (This is the size of a conventional ASTM type 2032 coin cell.) FeS in cathode housing 130 2 The weight of 0.0232g. The lithium in the anode housing 120 is in electrochemical excess.

[0093] In forming each cell 100, a plastic insulating ring 140 is first fitted around the side wall 122 of the anode casing 120 ( Figure 1A ). A stainless steel spring ring 200 is placed against the inner surface of the anode cas...

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Abstract

A primary cell having an anode comprising lithium and a cathode comprising iron disulfide (FeS2) and carbon particles. The electrolyte comprises a lithium salt dissolved in a solvent mixture which contains 1,3-dioxolane and preferably 1,3-dimethyl-2-imidazolidinone. A cathode slurry is prepared comprising iron disulfide powder, carbon, binder, and a liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.

Description

field of invention [0001] The invention relates to a lithium battery having an anode comprising lithium and a cathode comprising iron disulfide and an electrolyte comprising a lithium salt, preferably lithium iodide, and a solvent comprising 1,3-dioxolane and 1,3-dimethyl-2-imidazolinone. Background of the invention [0002] Primary (non-rechargeable) electrochemical cells with lithium anodes are known and are in wide commercial use. The anode consists essentially of lithium metal. Such cells typically have a cathode comprising manganese dioxide and a compound such as lithium trifluoromethanesulfonate (LiCF 3 SO 3 ) Lithium salt electrolyte. The battery is known in the art as a primary lithium battery (primary Li / MnO 2 batteries), and are generally not intended to be rechargeable. Alternatively, primary lithium cells with a lithium metal anode but with a different cathode are also known. For example, such batteries have iron disulfide (FeS 2 ) cathode and called Li / F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/06H01M6/16H01M4/58
CPCH01M2300/004H01M4/382H01M4/661H01M2300/0091H01M4/134H01M2300/0037Y02E60/122H01M4/405H01M4/625H01M6/164H01M4/5815H01M2300/0017H01M4/136H01M4/06Y02E60/10
Inventor 蒋志平L·弗里古格列蒂T·N·库卢里斯
Owner THE GILLETTE CO
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