It is well known that for optimal performance of electrochemical energy storage and conversion devices, it is necessary to have a nonplanar electrode to increase reaction area. One requires a porous electrode with multiple phases that can transport the reactant and products in the electrode while also undergoing reaction; an analogy in heterogeneous catalysis is reaction through a catalyst particle. For traditional devices, porous electrodes are often comprised of an electrolyte (which can be solid or liquid) that carries the ions or ionic current and a solid phase that carries the electrons or electronic current. In addition, there may be other phases such as a gas phase (e.g., fuel cells). Schematically one can consider the porous electrode as a transmission-line model as shown in Fig. 1.
BT - Encyclopedia of Applied Electrochemistry CY - New York, NY DA - 09/2014 DO - 10.1007/978-1-4419-6996-5_332 LA - eng N2 -It is well known that for optimal performance of electrochemical energy storage and conversion devices, it is necessary to have a nonplanar electrode to increase reaction area. One requires a porous electrode with multiple phases that can transport the reactant and products in the electrode while also undergoing reaction; an analogy in heterogeneous catalysis is reaction through a catalyst particle. For traditional devices, porous electrodes are often comprised of an electrolyte (which can be solid or liquid) that carries the ions or ionic current and a solid phase that carries the electrons or electronic current. In addition, there may be other phases such as a gas phase (e.g., fuel cells). Schematically one can consider the porous electrode as a transmission-line model as shown in Fig. 1.
PB - Springer New York PP - New York, NY PY - 2014 SN - 978-1-4419-6995-8 SP - 1203 EP - 1210 T2 - Encyclopedia of Applied Electrochemistry TI - Macroscopic Modeling of Porous Electrodes ER -