摘要
为了使燃料电池能够稳定地工作，必须在正负极催化剂的外边加垫一层憎水性的导电网——憎水基底以排出系统内多余的水分。传统的燃料电池中，憎水基底用憎水碳布，这种导电基底虽然具有良好的导电性和透气性，但由于其表面纹路凹凸不平致使其与电极表面接触面积较小，因而增大了电池的内阻，恶化了电池的性能。为了解决这个问题，本文制备出一种新的导电基底——憎水碳纸以取代之，并通过测定碳纸的透气性、面电阻和厚度、空隙度的关系，确定了制备憎水碳纸的最佳工艺条件：厚度在０．１ｍｍ以内，孔隙度为０．７左右。这种方法制备的碳纸表面平整、电阻小、透气性好。
To make fuel cell work stably, a layer of hydrophobic conductive material must be put outside the catalyst of both positive and negative electrodes to drain off the surplus water in the system. In traditional fuel cell, the hydrophobic base is hydrophobic carbon fiber cloth. Although it has excellent conductivity and permeability, its surface is so uneven that the contact area with the surface of the electrode is very small. Therefore, the resistance of fuel cell is increased. To solve the problem, we prepared a new kind of conductive base hydrophobic carbon paper to replace traditional hydrophobic carbon fiber cloth. Through contrast experiments, we determined the optimum conditions of process for producing hydrophobic paper, i.e.the thickness must be smaller than 0.1mm and the porosity must be about 0.7mm.
出处
《电源技术》
CAS
CSCD
北大核心
1999年第2期126-127,共2页
Chinese Journal of Power Sources
关键词
燃料电池
憎水基底
质子交换膜
制作工艺
fuel cell, hydrophobic matrix, technology parameters, conductivity, permeability for gas
