Diffusion impedance trapping

Unlike most crystalline solid electrolytes, the PEO-based electrolytes, such as LiClO. (PEO)g, conduct both anions and cations. While many high-conductivity solid electrolytes for cations are known, there are relatively few good conductors of anions. This work began as an exploration of the possibility of preparing PEO electrolytes in which the anion transport number is essentially one. The initial strategy was to prepare solid solutions of divalent cations and monovalent anions in PEO, with the expectations that the divalent cations would be trapped and their diffusion impeded by their double charge. 

Tcrminadon is commonly diffusion-controlled, i.c., it is governed by the rate at which the reactive sites in growing radicals can come together rather than by chemical factors. In viscous media, termination may be so seriously impeded that both the overall rate of polymerization and the degree of polymerizadon increase markedly. In systems where the polymer is insoluble in the reacdon medium, polymer radicals may be trapped in the precipitated material and be able to grow but unable to participate in temunation processes. 

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