Condensed Matter Physics Seminar

Intriguing Physics of Frozen Battery

Dr. Takashi Imai
Department of Physics and Astronomy
McMaster University, Hamilton, CANADA
Canadian Institute for Advanced Research, Toronto, CANADA

Lithium ion batteries fail in extremely cold atmosphere, because the mobility of Li ions degrades in LixCoO2. Similarly, ionic motion of Na+ in NaxCoO2 freezes below ~200 K. It turns out that frozen NaxCoO2 is an ideal model system to explore fundamental issues of modern condensed matter physics. Besides an unconventional superconducting state of Na1/3CoO2[H2O]4/3 that defies the BCS theory, several phases with extraordinary properties have been identified. In this talk, I will focus on NMR (Nuclear Magnetic Resonance) investigation of "charge stripes" in Na0.5CoO2 and "spin liquid state" in Na0.71CoO2.

Wednesday, September 12, 2007
2:00 pm
Gant Science Complex
Materials Science Building
Room IMS20

(The seminar is followed by coffee/tea, cookies, and an informal discussions.)

© 2007 Department of Physics, University of Connecticut
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