A strategy used to design high capacity (.200 mAh g 21 ), Li 2 MnO 3 -stabilized LiMO 2 (M = Mn, Ni, Co) electrodes for lithium-ion batteries is discussed. The advantages of the Li 2 MnO 3 component and its influence on the structural stability and electrochemical properties of these layered xLi 2 MnO 3 ?(1 2 x)LiMO 2 electrodes are highlighted. Structural, chemical, electrochemical and thermal properties of xLi 2 MnO 3 ?(1 2 x)LiMO 2 electrodes are considered in the context of other commercially exploited electrode systems, such as LiCoO 2 , LiNi 0.8 Co 0.15 Al 0.05 O 2 , Li 1+x Mn 22x O 4 and LiFePO 4 . G o o d e n o u g h a t O x f o r d University, UK. After spending twenty years at the Council for Scientific and Industrial Research (CSIR), Pretoria, South Africa (1973-1994) on battery-related research, he moved to the United States where he is currently an Argonne Distinguished Fellow and Group Leader at Argonne National Laboratory outside Chicago. His primary research interest is determining the structure-electrochemical properties of solid electrolyte and electrode materials for electrochemical applications.Sun-Ho Kang received his B.S. (1992), M.S. (1994), a n d P h . D . ( 1 9 9 8 ) i n M a t e r i a l s S c i e n c e a n d Engineering from Seoul National University, South Korea. After studying as a postdoctoral fellow with P r o f e s s o r J o h n B . Goodenough at the University of Texas at Austin (1999)(2000), he joined the Chemical Engineering Division at A r g o n n e N a t i o n a l Laboratory. His primary research interests include synthesis, electrochemical and transport properties, and structure-property relationships of electrode materials for energy storage and conversion systems.

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The role of thermal spikes in energetic displacement cascades has been investigated by moleculardynamics computer simulation. For cascade energies of 3 and 5 keV in Cu, which are the highest energies (in reduced units) yet treated by fully dynamical simulations, it is found that local melting occurs and persists for several picoseconds. The implications of this behavior for atomic mixing, Frenkel-pair production, and point-defect clustering are discussed.