Doped LiFePO₄ cathodes for high power density lithium ion batteries

Olivine LiFePO4 has received much attention recently as a promising storage compound for cathodes in lithium ion batteries. It has an energy density similar to that of LiCoO 2, the current industry standard for cathode materials in lithium ion batteries, but with a lower raw materials cost and an increased level of safety. An inherent limitation of LiFePO4 acknowledged by researchers studying this material is that its low intrinsic electronic conductivity limits its applicability in commercial systems. Through a doping process, however, its electrochemical performance at high current rates can be improved to levels above that of commercially available lithium batteries. The increase in performance is brought about by a concurrent increase in the electronic conductivity and a reduction of the final particle size. The experimental data suggest that cells formulated with this doped cathode material may produce power densities high enough for consideration as a future battery system for hybrid electric vehicles and other high rate applications.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2003

Author dc:creator

• Bloking, Jason T. (Jason Thompson), 1979-

Advisor dc:contributor.advisor

• Yet-Ming Chiang.

• Materials Science and Engineering.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/40617

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/40617