Electrochemical behaviour and surface conductivity of niobium carbide-modified austenitic stainless steel bipolar plate
Electrochemical behaviour and surface conductivity of niobium carbide-modified austenitic stainless steel bipolar plate
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碳化铌改性奥氏体不锈钢双极板的电化学行为及表面电导率
DOI:
10.1016/j.jpowsour.2013.08.025
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发表时间:
2014-01
影响因子:
9.2
通讯作者:
Wang, Xiaochun
中科院分区:
文献类型:
--
作者:
Li, Song;Ji, Shijun;Wen, Zhongsheng;Wang, Xiaochun
A niobium carbide diffusion layer with a cubic NbC phase surface layer (∼6 μm) and a Nb and C diffusion subsurface layer (∼1 μm) is fabricated on the surface of AISI 304 stainless steel (304 SS) bipolar plate in a proton exchange membrane fuel cell (PEMFC) using plasma surface diffusion alloying. The electrochemical behaviour of the niobium carbide diffusion-modified 304 SS (Nb–C 304 SS) is investigated in simulated PEMFC environments (0.5 M H2SO4and 2 ppm HF solution at 80 °C). Potentiodynamic, potentiostatic polarisation and electrochemical impedance spectroscopy measurements reveal that the niobium carbide diffusion layer considerably improves the corrosion resistance of 304 SS compared with untreated samples. The corrosion current density of Nb–C 304 SS is maintained at 0.058 μA cm−2and 0.051 μA cm−2under simulated anodic and cathodic conditions, respectively. The interfacial contact resistance of Nb–C 304 SS is 8.47 mΩ cm2at a compaction force of 140 N cm−2, which is significantly lower than that of the untreated sample (100.98 mΩ cm2). Moreover, only a minor increase in the ICR of Nb–C 304 SS occurs after 10 h potentiostatic tests in both cathodic and anodic environments.
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DOI:
10.1021/j100839a029
发表时间:
1960-10
期刊:
The Journal of Physical Chemistry
影响因子:
--
作者:
E. Storms;N. Krikorian
通讯作者:
E. Storms;N. Krikorian
DOI:
10.1021/j100044a025
发表时间:
1995-11
期刊:
The Journal of Physical Chemistry
影响因子:
--
作者:
S. Ramanathan;S. Oyama
通讯作者:
S. Ramanathan;S. Oyama
影响因子:
9.2
作者:
Tian, Rujin;Sun, Juncai
通讯作者:
Sun, Juncai
影响因子:
9.2
作者:
R. Tian;J. C. Sun;Liang Wang
通讯作者:
R. Tian;J. C. Sun;Liang Wang
影响因子:
9.2
作者:
Yan Wang;D. Northwood
通讯作者:
Yan Wang;D. Northwood