Transient Response and Steady-State Analysis of the Anode of Direct Methanol Fuel Cells Based on Dual-Site Kinetics

Figure 12

Distribution of dimensionless current density at 𝑇=333 K, 𝑐⁰_M=1.0 M, 𝐸⁰=0.4 V, 𝜅_e=3.4 Ω⁻¹ m⁻¹, 𝐷_e=3.04×10⁻¹⁰ m² s⁻¹; (a) 𝑙=10 μm, 𝑎=1.0×10⁵ m⁻¹; (b) 𝑙=25 μm, 𝑎=1.0×10⁵ m⁻¹; (c) 𝑙=50 μm, 𝑎=1.0×10⁵ m⁻¹; (d) 𝑙=10 μm, 𝑎=5.0×10⁴ m⁻¹; (e) 𝑙=10 μm, 𝑎=1.0×10⁶ m⁻¹, the dimensionless current densities on the points of A are (a) 0.0674, (b) 0.0312, (c) 0.0214, (d) 0.1080, and (e) 0.0275.