高等学校化学学报2016，Vol.37Issue(12)：2228-2235,8.DOI:10.7503/cjcu20160432
改性316 L不锈钢表面聚苯胺的制备及电化学性能
Preparation and Electrochemical Performance of Polyaniline Film Formed on Acid-activated Stainless Steel 316L†
摘要
Abstract
Ni⁃Cr enrichment on stainless steel 316L(SS316L) was achieved by adjusting the concentration and distribution of Cr and Ni on the surface of the SS316L substrate through in situ oxidation processes. Aniline monomers were absorbed and polymerized on the surface of modified SS316L, and a polyaniline ( PANI)/Ni⁃Cr enriched SS316L composite was prepared using chronopotentiometry ( CP ) technique. Under both reducing(anode simulated) and oxidizing(cathode simulated) conditions of proton exchange membrane fuel cell( PEMFC) , the results of potentiodynamic test showed that the PANI coating increased the free corro⁃sion potential of the steel by more than 470 and 500 mV, respectively, with a passivation current density more than 2—3 orders of magnitude lower than that of the bare steel. Under the PEMFC environment, the corrosion currents of the anode and cathod of PANI/Ni⁃Cr enriched SS316L electrode were decreased by 1 and 2 orders of magnitude, and corrosion rates of the anode and cathode were about 6—9 μA/cm2 and <5 μA/cm2 , re⁃spectively. Furthermore, the interface contact resistance between the PANI film and carbon paper was reduced by about 250�0 mΩ·cm2 at a compaction pressure of 1.4 MPa. Polyaniline/Ni⁃Cr enriched SS316L bipolar plate was remarkably more stable in simulated PEMFC environments, and more conducting compared to the bare SS316L.关键词
Ni-Cr改性层/质子交换膜燃料电池/不锈钢/聚苯胺/双极板Key words
Ni-Cr modified layer/Proton exchange membrane fuel cell/Stainless steel/Polyaniline/Bipolar plate分类
化学化工引用本文复制引用
刘明,田颖,傅杰,徐洪峰..改性316 L不锈钢表面聚苯胺的制备及电化学性能[J].高等学校化学学报,2016,37(12):2228-2235,8.基金项目
国家自然科学基金（批准号21106012）和辽宁省教育厅基金（批准号 L2014180）资助．? Supported by the National Natural Science Foundation of China（ No．21106012） and the Educational Department Foundation of Liaoning Province of China（ No． L2014180）． （）
