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Cathode powders for batteries

A powder, rechargeable battery technology, used in battery electrodes, circuits, electrical components, etc.

Inactive Publication Date: 2011-02-23
PYROTECK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Again, existing materials often cannot meet these requirements

Method used

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  • Cathode powders for batteries
  • Cathode powders for batteries
  • Cathode powders for batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0069] Powder Preparation - Green petroleum regular coke (85% fixed carbon content) was ground using a jet mill such that the resulting green coke powder had an average particle size of about 8 microns. The obtained green coke powder was heated at 850° C. for 2 hours under a nitrogen atmosphere.

[0070] Next, in a sealed stainless steel vessel, 500 grams of the heated powder was dispersed in 2500 grams of xylene to form premix A and heated to 140° C. while continuously stirring. Next, 500 grams of petroleum pitch was completely dissolved in 500 grams of xylene to form premix B. Premix B was also heated to 140°C and then poured into Premix A and mixed together thoroughly. The resulting mixture was heated at 160° C. for 10 minutes and then cooled to room temperature while stirring the mixture continuously. The bituminous coating powder formed in the mixture was separated by filtration, washed twice with 1000 ml xylene and dried under vacuum. The resulting dry powder product ...

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Abstract

Methods and compositions relate to cathode powders for use in batteries. The powders may provide limited surface area per volume of powder material. Further, the powders may include limited amounts of particles below a threshold size within a particle size distribution. some embodiments utilize regular or anode grade petroleum coke as a precursor.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to U.S. Provisional Patent Application Serial No. 61 / 041,150, filed March 31, 2008, which is hereby incorporated by reference in its entirety field of invention [0003] Embodiments of the present invention relate to negative electrode powders for batteries. Background of the invention [0004] The materials used to construct a battery determine its ability to meet the required requirements in terms of performance and safety. Existing negative electrode materials include carbonaceous particles such as graphite powder. However, such existing materials do not provide adequate protection against hazardous conditions caused by rapid discharge of the battery, such as a short circuit. This potential problem is especially true for lithium-ion batteries. While lightweight, high energy batteries are ideal, minimizing the consequences of potentially hazardous situations has bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58C01B31/04C01B31/00
CPCH01M4/587H01M4/366C01P2004/03H01M2004/021C01B31/04C01B32/20C01B32/205Y02E60/10C01P2006/12C01P2004/80C01P2006/40
Inventor 毛振华爱德华·J·南尼马克·W·卡尔W·马克·索瑟德巴拉特·S·查哈尔
Owner PYROTECK INC
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