http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102610813-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8bb531ac161ea927fd276b48f26bc7af |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02E60-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01M4-58 |
| filingDate | 2011-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-01-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d4e44544a36ed25e384bbbecef7f5f8e |
| publicationDate | 2015-01-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102610813-B |
| titleOfInvention | Method for removing impurities from lithium iron phosphate (LiFePO4) and LiFePO4 battery |
| abstract | The invention discloses a method for removing impurities from lithium iron phosphate (LiFePO4) and a LiFePO4 battery. The method comprises the following steps of: soaking a carbon-coated LiFePO4 material in an inorganic acid aqueous solution with the pH value of 3.5-8.0, stirring, carrying out heat preservation at the temperature of 40-90 DEG C, and detecting the change of a pH value of a system; when the pH value is increased to 4.0-8.0, dropwise adding an inorganic acid aqueous solution with the pH value of 1-6.0 so as to enable the pH value of a reaction system to constantly be 3.5-8.0; carrying out reaction for 1-100 hours at the temperature of 40-90 DEG C, filtering, cleaning a residue obtained through filtering by using an organic solvent, drying and grinding the residue so as to obtain the processed material; and then, calcining the material under the protection of inert gas to obtain the LiFePO4 which is subjected to impurity removal. The battery contains the LiFePO4 which is subjected to impurity removal. According to the embodiment of the invention, the impurities, such as Fe simple substance, FeO, Fe2O3, Fe2P and the like, can be removed without destroying Fe in the LiFePO4, so that black spots on the cathode and a diaphragm in the battery are eliminated, the self-discharge capacity of the battery is lowered, and the safety performance of the battery is improved. |
| priorityDate | 2011-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.