期刊论文详细信息
Journal of the Brazilian Chemical Society
Self-assembled films from chitosan and poly(vinyl sulfonic acid) on Nafion® for direct methanol fuel cell
Facci, Tiago1  Huguenin, Fritz1  Universidade de São Paulo, Ribeirão Preto, Brazil1  Borissevitch, Galina1  Azevedo, Dayse C. de1  Dias, Luis G.1  Faculdades COC, Ribeirão Preto, Brazil1  Vinhola, Leonardo1 
关键词: chitosan;    direct methanol fuel cell;    proton exchange membrane;    crossover effect;    methanol permeability;   
DOI  :  10.1590/S0103-50532012000300021
学科分类:化学(综合)
来源: SciELO
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【 摘 要 】

Chitosan/poly(vinyl sulfonic acid) (PVS) films have been prepared on Nafion® membranes by the layer-by-layer (LbL) method for use in direct methanol fuel cell (DMFC). Computational methods and Fourier transform infrared (FTIR) spectra suggest that an ionic pair is formed between the sulfonic group of PVS and the protonated amine group of chitosan, thereby promoting the growth of LbL films on the Nafion® membrane as well as partial blocking of methanol. Chronopotentiometry and potential linear scanning experiments have been carried out for investigation of methanol crossover through the Nafion® and chitosan/PVS/Nafion® membranes in a diaphragm diffusion cell. On the basis of electrical impedance measurements, the values of proton resistance of the Nafion® and chitosan/PVS/Nafion® membranes are close due to the small thickness of the LbL film. Thus, it is expected an improved DMFC performance once the additional resistance of the self-assembled film is negligible compared to the result associated with the decrease in the crossover effect.

【 授权许可】

Unknown   

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