Figure 2

From: Rechargeable-hybrid-seawater fuel cell

Figure 2

(a) Charge–discharge profile of Na/seawater cells; (b and c) changes of Na+ and Cl concentration with charging time; (d) FT-IR (Fourier transform infrared) spectrum of the OH-stretching region (H2O bridging mode at 3180 cm−1, H-bonded interlayer H2O surrounding the interlayer anion at 3380 cm−1 and metal-OH stretching mode at 3580 cm−1) including the corresponding pH values.