Thermally and/or electrically conductive materials and method for the production thereof
US-2018291172-A1 · Oct 11, 2018 · US
Sulfur-modified polyacrylonitrile, manufacturing method therefor, and application thereof
US8940436B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8940436-B2 |
| Application number | US-200913123933-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 15, 2009 |
| Priority date | Oct 17, 2008 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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Provided is a sulfur-modified polyacrylonitrile manufacturing method that is characterized in that a starting base powder that comprises sulfur powder and polyacrylonitrile powder is mixed and the mixture is heated in a non-oxidizing environment while outflow of sulfur vapor is prevented. Also provided are a cathode for lithium batteries that uses, as the active substance, the sulfur-modified polyacrylonitrile manufactured with the method, and a lithium secondary battery that includes the cathode as a component element. This enables the practical use of an inexpensive sulfur-based material as the cathode material for lithium secondary batteries, and in particular, a sulfur-based cathode material that enables higher output and has excellent cycle life characteristics, as well as other characteristics, and secondary lithium batteries using the same can be obtained.
First claim
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The invention claimed is: 1. A method of manufacturing sulfur-modified polyacrylonitrile, comprising: mixing a base powder comprising sulfur powder and polyacrylonitrile powder; heating the base powder to a temperature of from 250 to 500 degree Celsius under a nonoxidative atmosphere while preventing the effluence of sulfur vapor to obtain a crude sulfur-modified polyacrylonitrile; cooling the crude sulfur-modified polyacrylonitrile; and heating the cooled crude sulfur-modif…
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- What does patent US8940436B2 cover?
- Provided is a sulfur-modified polyacrylonitrile manufacturing method that is characterized in that a starting base powder that comprises sulfur powder and polyacrylonitrile powder is mixed and the mixture is heated in a non-oxidizing environment while outflow of sulfur vapor is prevented. Also provided are a cathode for lithium batteries that uses, as the active substance, the sulfur-modified p…
- Who is the assignee on this patent?
- Miyuki Takuhiro, Sakai Tetsuo, Niwa Junichi, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification C08F20/44. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).