http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2002187709-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b27deaf45890893586c2ed77ac13dc32 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02E60-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B31-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01M4-587 |
| filingDate | 2000-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e3cf22343244c5cc15935257c005e7c1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c5267bbc8f1607fe29bfb4928e7da583 |
| publicationDate | 2002-07-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2002187709-A |
| titleOfInvention | Manufacturing method of graphite powder |
| abstract | (57) [Summary] [Problem] A lithium ion having a discharge capacity of 350 mAh / g or more, which is close to the theoretical capacity, a charge / discharge efficiency of as high as 90% or more, and a charge / discharge efficiency that is unlikely to be reduced even in large current discharge or low temperature discharge A graphite powder suitable for a negative electrode material of a secondary battery is stably manufactured. SOLUTION: Tar and / or pitch having a free carbon content of 0.1% by mass or less and a toluene-insoluble content of 5% by mass or less purified by a ketone solvent are preferably heated to 250 to 400 ° C. in the presence of a nitrating agent. After heating and polycondensation treatment, the bulk mesophase carbon obtained by heat treatment in the temperature range of 400 to 600 ° C is pulverized by one or both of high-speed impact pulverization at 5000 rpm or more and shear pulverization, and carbonized and graphitized. Manufacture graphite powder. This graphite powder has a d00 2 is less than 3.360 mm and has high crystallinity with a crystallite thickness of 350 mm or more. |
| priorityDate | 2000-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.