Invention Grant
- Patent Title: Producing coated graphitic anode powders by extracting pitch from high volatile matter coke and coating the same in-situ
- Patent Title (中): 通过从高挥发物焦炭中提取沥青并原位涂覆石墨生成阳极粉末涂层
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Application No.: US12355888Application Date: 2009-01-19
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Publication No.: US07964240B2Publication Date: 2011-06-21
- Inventor: Mark W. Carel , Edward J. Nanni
- Applicant: Mark W. Carel , Edward J. Nanni
- Applicant Address: US TX Houston
- Assignee: ConocoPhillips Company
- Current Assignee: ConocoPhillips Company
- Current Assignee Address: US TX Houston
- Main IPC: B05D3/02
- IPC: B05D3/02

Abstract:
This invention relates to a process for making carbon coated graphitic anode powders for use in batteries including rechargeable lithium-ion batteries wherein the process includes a side product isotropic pitch for use as a precursor in other products and more preferably, as a coating material for other powder or particle products. The process includes the steps of solvent extraction of volatile materials from high volatile material green coke powder. When a desirable amount of the volatile materials have been extracted, the solvent strength is altered to cause some of the volatile materials to precipitate on the powder particles to coat the same. The coated and solvent-extracted particles are then separated from the solvent and oxidatively stabilized, then carbonized and preferably graphitized. The volatile materials remaining in the solvent are valuable and are recovered for use in other processes and other products.
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