Effect of nano-size of functionalized silica on overall performance of swelling-filling modified Nafion membrane for direct methanol fuel cell application
Effect of nano-size of functionalized silica on overall performance of swelling-filling modified Nafion membrane for direct methanol fuel cell application
复制标题
功能化二氧化硅纳米尺寸对直接甲醇燃料电池用溶胀填充改性Nafion膜整体性能的影响
DOI：
10.1016/j.apenergy.2018.01.052
复制
发表时间：
2018-03-01
期刊：
影响因子：
11.2
通讯作者：
Cai, Weiwei
中科院分区：
文献类型：
--
作者：
Li, Jing;Xu, Guoxiao;Cai, Weiwei
采用非破坏性溶胀-填充（SF）策略，以功能化二氧化硅（F-silica）纳米粒子为填料，对Nafion进行无机改性。以制备的F-硅胶为SF处理剂，通过F-硅胶填料上的含氧基团与Nafion链上的-SO 3 H基团之间的氢键作用，使单分散的F-硅胶纳米粒子原位嵌入到Nafion膜中，并紧密锚在Nafion链上。F-二氧化硅纳米颗粒在改性Nafion膜中作为双功能填料，同时提高质子传导性能和抗甲醇渗透性能。因此，100%增强的质子/甲醇选择性导致直接甲醇燃料电池（DMFC）在功率输出方面的性能提高30%以上。综合考虑其良好的机械稳定性、热稳定性和氧化稳定性，F-SiO2-Nafion膜在高能DMFC中具有良好的应用前景。
A non-destructive swelling-filling (SF) strategy is applied for inorganic modification on Nafion by using functionalized silica (F-silica) nanoparticles as fillers. With the facilely prepared F-silica gel as SF treating agent, the mono-dispersed F-silica nanoparticles can in-situ insert into the Nafion membrane and tightly anchor on the Nafion chains through the hydrogen bonding interaction between the oxygen containing groups on F-silica fillers and -SO3H group on Nafion chains. The F-silica nanoparticles act as bi-functional fillers in the modified Nafion membrane to improve proton conductive and methanol-permeation resistive performances simultaneously. 100% enhanced proton/methanol selectivity therefore leads to a more than 30% improved direct methanol fuel cell (DMFC) performance in terms of power output. By considering the great mechanical, thermal and oxidative stabilities comprehensively, the F-silica-Nafion membranes exhibit promising application potential for high-energy DMFC application.