ABSTRACT

In this chapter the relationship between nanoarchitecture and electrochemical properties of composite cathode materials based on LiFePO4 will be discussed in detail. We start out from studies of the inherent materials properties based on single crystal experiments. These will provide insight into defect chemistry, mass and charge transport as well as into phase transition behavior of the FePO4/LiFePO4 two phase system. Then the possibilities of optimizing the performance (e.g., by doping) will be discussed, out of which nanostructuring appears to be most promising. Diff erent nanoarchitectures, their significance as well as their preparation will be discussed. The detailed understanding of the transport and storage aspects allows us to deduce appropriate nanoarchitectures that comprise both electroactive material and electrochemical wiring.