Method for preparing high-density spherical ferric lithium phosphate as anode material of lithium-ion battery
Title：
Method for preparing high-density spherical ferric lithium phosphate as anode material of lithium-ion battery
Application Number：
 200410103485
Application Date：
 2004/12/30
Announcement Date：
 2005/07/06
Pub. Date：
 2007/03/14
Publication Number：
 1635648
Announcement Number：
 1305147
Grant Date：
 2007-3-14
Granted Pub. Date：
 2007-3-14
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H01M 4/04, H01M 4/58, H01M 4/48, C01D 15/00, C01B 25/00, C01G 49/00
Applicant(s)：
 Tsinghua University
Inventor(s)：
 Ying Jierong, Lei Min, Jiang Changyin
Key Words：
 prepare, high-density, spherical, ferric lithium phosphate, anode material, lithium-ion battery
Abstract：
 This invention discloses the method for preparing high-density spherical lithium ferric phosphate used as the positive material of lithium ion cell, which contains synthesizing the ferric iron salt aqueous solution, phosphorus source aqueous solution and alkali aqueous solution to form spherical or spheroid ferric phosphate precursor, uniformly mixed with lithium source, carbon source and doped metal compound after being washed and dried, high temperature heat treating at 600-900 degree centigrade for 8-48 hr under inertia or reducing atmosphere protection to obtain lithium ferric phosphate with mean grain size of 7-12 micrometer,2.0-2.2g/cm3 of tap density, high buck density of 140-155mAh/g first discharge ratio capacity at normal temperature, and high volume ratio capacity.
Claim：
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PCT：
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