| Lee et al. (2001) | Lee and Tu (2001) | Hue Ye et al. (2003) |
Temperature (˚C) Current density A/cm2 Time (h) D × Z* | 120˚C 2 × 104 324 2.16 × 10−11 | 120˚C 3.8 × 104 39.5 1.85 × 10−10 | Room Temperature 1.3 × 104 37.5 3.62 × 10−10 |