Core Size-Dependent Proton Conductivity of Silica Filler-Functionalized Polymer Electrolyte Membrane
Core Size-Dependent Proton Conductivity of Silica Filler-Functionalized Polymer Electrolyte Membrane
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DOI：
10.1021/acssuschemeng.0c04033
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发表时间：
2020-10-05
影响因子：
8.4
通讯作者：
Masuhara, Akito
中科院分区：
文献类型：
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作者：
Nohara, Tomohiro;Koseki, Kazuki;Masuhara, Akito
聚合物电解质燃料电池(PEFC)有望成为下一代能源系统，其性能很大程度上依赖于聚合物电解质膜(PEM)。我们利用填充法提出了一种具有三维质子传导通道结构的质子交换膜新模型，重点研究了填充粒子的功能化问题。采用可逆加成-断裂链转移聚合法制备了三种不同粒径的聚合物表面功能化二氧化硅纳米颗粒。由质子导电聚合物和保护聚合物组成的原位聚合嵌段共聚物包覆了二氧化硅纳米颗粒。证实了随着芯粒尺寸的减小，质子电导率增大，活化能减小，这是由于增大了粒子间的总界面面积，增加了质子传导通道。
Polymer electrolyte fuel cells (PEFC) are expected as next energy generation systems, and their performance is strongly dependent upon the polymer electrolyte membrane (PEM). We have suggested a new model of PEM with a three-dimensional proton conduction passways structure using the filler method, particularly focused on the functionalization of filler particles. The polymer surface-functionalized silica nanoparticles (NPs) with three different particle sizes were prepared by the reversible addition-fragmentation chain transfer polymerization with particles (RAFT PwP) method that we developed. Silica NPs coated with an in situ polymerized block copolymer consisted of a proton conductive polymer and a protective polymer. We confirmed that the proton conductivity increased and the activation energy decreased as the core particle size became smaller because of enlarging the total interface area between each particle and increasing the proton conduction passways.