Performance of niobium nitride-modified AISI316L stainless steel as bipolar plates for direct formic acid fuel cells
Performance of niobium nitride-modified AISI316L stainless steel as bipolar plates for direct formic acid fuel cells
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氮化铌改性AISI316L不锈钢作为直接甲酸燃料电池双极板的性能
DOI：
10.1016/j.ijhydene.2017.02.145
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发表时间：
2017
影响因子：
7.2
通讯作者：
Sun Juncai
中科院分区：
文献类型：
--
作者：
Cui Jinlong;Jing Bo;Xu Xiao;Wang Lixia;Cheng Fupeng;Li Song;Wen Zhongsheng;Ji Shijun;Sun Juncai
采用等离子体表面扩散合金化（PSDA）技术，在直接甲酸燃料电池（DFAFC）双极板AISI 316L不锈钢（316L SS）表面制备了一层氮化铌扩散层（Nb-N层）。氮化铌改性的AISI 316 L不锈钢（Nb-N 316 L SS）具有致密且连续的氮化铌扩散层，其具有单一立方NbN相。系统研究了Nb-N 316 L SS在模拟DFAFC阳极环境（0.05 M H2SO 4 + 2 ppm HF + x M甲酸（x = 2，5，10和15），50 °C）中的耐蚀性和表面导电性。动电位和恒电位极化曲线测试表明，经PSDA改性后的316 L不锈钢在模拟DFAFC环境中的耐蚀性得到明显改善。Nb-N 316 L SS的界面接触电阻（ICR）在恒电位极化测试前后均比裸316 L SS小得多。
A niobium nitride diffusion layer (Nb–N layer) has been synthesized via the plasma surface diffusion alloying (PSDA) technique on the surface of AISI316L stainless steel (316L SS), which is used as bipolar plates of direct formic acid fuel cells (DFAFCs). The niobium nitride-modified AISI316L stainless steel (Nb–N 316L SS) has a compact and successive niobium nitride diffusion layer with a single cubic NbN phase. The corrosion resistance and surface conductivity of Nb–N 316L SS are systematically investigated in the simulated anodic environments of DFAFC (0.05 M H2SO4+ 2 ppm HF + x M formic acid (x = 2, 5, 10 and 15) at 50 °C). The potentiodynamic and potentiostatic polarization tests demonstrate that the corrosion resistance of 316L SS is distinctly ameliorated in the simulated DFAFC environments after the PSDA modification. The interfacial contact resistances (ICR) of Nb–N 316L SS are much smaller than those of bare 316L SS before and after potentiostatic polarization tests.