Electrolytes grain boundary resistance

The equivalent circuit of a section of this SEI is presented in Fig. 13(b). It was recently found [123, 124] that at temperatures lower than 90 °C, the grain-boundary resistance of composite polymer electrolytes and composite solid electrolytes based on Lil-A Ojis many times larger than their ionic resistance. At 30 °C / GB is several orders of magnitude larger than (the ionic resistance) and for 100 pm-thick CPE foils or Lil-A Oj pellets it reaches [125] 105-106Qcm2 (depending on CPE composition). 

Separate the bulk resistance and the grain boundary resistance in solid electrolytes... 

Corrosion is a complex phenomenon that may take any one or more of several forms. It is usually confined to the metal surface, and this is called general corrosion. But it sometimes occurs along defective and/or weak grain boundaries or other hnes of weakness because of a difference in resistance to attack or local electrolytic action. 

Boundary impedances refer either to heterocontacts, such as the contacts of the electrode to the electrolyte or contacts between the grains of different phases in composites, or to homocontacts, i.e., grain boundaries. In this chapter, we restrict ourselves to resistive... 

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