| Summary: | This thesis identifies and discusses physical mechanisms in intercalation
batteries. The effects of interactions and ordering of intercalated atoms
on the voltage behaviour of intercalation cells is described, largely in
terms of the lattice gas model of intercalation. Particular emphasis is
given to the mean field solutions of the lattice gas model, which are
compared to more exact solutions for several cases. Two types of interaction
between intercalated atoms are discussed, namely electronic and elastic
interactions; it is found that both can be important in intercalation
compounds. The kinetics of intercalation batteries is also discussed, with
emphasis on overpotentials due to diffusion of the intercalated atoms in the
host lattice. Experimental studies of the voltage behaviour of three types
of lithium intercalation cells, Li[sub=x]TiS₂, Li[sub=x]MoO₂, and Li[sub=x]MoS₂, are presented,
which illustrate the variety of voltage behaviour found in intercalation cells. === Science, Faculty of === Physics and Astronomy, Department of === Graduate
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