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Chairholder Profile

Jeffrey Dahn

Jeffrey Dahn

Department of Physics and Atmospheric Science
Dalhousie University

Chair Title

NSERC-3M Canada Industrial Research Chair in Materials for Advanced Batteries

Chair Program

Industrial Research Chairs Program

Role

Senior Chairholder since 1996

Summary

Rechargeable batteries play a critical role in today's world of mobile communications and portable electronics. Furthermore, the age of hybrid and all-electric vehicles has begun and improved batteries are necessary. The lithium-ion battery is the state-of-the-art rechargeable power source. It stores about twice the energy per unit mass or volume of conventional technologies and is hence very attractive. Sales of small lithium-ion and lithium-ion polymer batteries were about six billion dollars in 2004.

The fundamental physics and chemistry of the current Li-ion battery is based on a process known as "intercalation:" the reversible insertion of guest atoms (like lithium) into host solids (the battery electrode materials). Our research focuses on the synthesis, characterization and understanding of new compounds that can store more guest atoms per formula weight of host. This leads to batteries with even higher energy densities and allows reduction of the size of battery packs to power the same equipment. Our work has lead to about 15 patents and about 150 publications on new materials for lithium-ion batteries in the last nine years. Our industrial partner, 3M, is now commercializing new positive electrode materials based on our work.

We synthesize new materials using a variety of techniques including sol-gel methods, mechanical alloying, magnetron sputtering and direct solid-state reactions. We now are the first Canadian laboratory to practice Combinatorial and High Throughput Materials Science, where hundreds or thousands of distinct stoichiometries are made and characterized in a single experiment. This speeds the materials discovery process.

Partner

  • 3M Canada Company

Contact Information

Department of Physics and Atmospheric Science
Dalhousie University
6300 Coburg Road
Halifax, Nova Scotia
B3H 3J5

Tel.: 902-494-2991
Fax: 902-494-5191
Email: jeff.dahn@dal.ca

Website:
This link will take you to another Web site http://chemistry.dal.ca/Faculty/Professors/Dahn,_Jeff.php