Charge Transport Along and Across Grain Boundaries

3 Charge Transport Along and Across Grain Boundaries 

In the case of an enhanced charge carrier concentration in the space charge (cf. Fig. 4b), mainly the current parallel to the grain boundary plane is important. The corresponding parallel excess grain boundary conductance 

4 Electrical Transport and Electrochemical Reactions at Electrode/Solid Interfaces 

In the case of electrical transport across and along space charge layers at grain boundaries, there is usually no fundamental difference between electronic and ionic charge carriers. At electrodes, however, electrons and ions behave completely differ- 

In the rest of this section some aspects of the oxygen reduction reaction 

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