Method for preparing high density lithium ferric phosphate by microwave heating |
Title: |
Method for preparing high density lithium ferric phosphate by microwave heating |
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Application Number: |
200610065211 |
Application Date: |
2006/03/20 |
Announcement Date: |
2006/08/23 |
Pub. Date: |
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Publication Number: |
1821064 |
Announcement Number: |
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Grant Date: |
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Granted Pub. Date: |
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ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
C01B 25/45, H01M 4/58 |
Applicant(s): |
Tsinghua Univ. |
Inventor(s): |
Li Wei, Ying Jierong, Jiang Changyin, Wan Chunrong, Lei Min, Tang Changping, Gao Jian |
Key Words: |
high density, lithium ferric phosphate, microwave heating |
Abstract: |
The present invention is microwave synthesis process of high density spherical lithium ferric phosphate as the positive electrode material of lithium ion cell, and belongs to the field of energy source material preparing technology. Spherical lithium ferric phosphate is prepared through mixing high density ammonium ferrous phosphate and lithium acetate in the equal molar ratio and adding proper amount of carbon source drying, tabletting in tabletting machine at 10-40 MPa pressure and burying into carbon crucible for absorbing microwave and generating protecting atmosphere heating inside microwave oven of 100-800 W power for 1-20 min, and cooling aturally to room temperature. Thus prepared spherical lithium ferric phosphate has average grain size of 5-12 microns, tap density 2.0-2.2 g/cu cm, and room temperature initial specific discharge capacity of 140-160 mA/g. |
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