膜
复合数
质子交换膜燃料电池
化学
电导率
化学工程
壳聚糖
纳米颗粒
质子
质子输运
甲醇
复合材料
材料科学
有机化学
物理化学
生物化学
物理
量子力学
工程类
作者
Xiangjian Fan,Ying Ou,Haiyan Yang,Haiyang Yang,Ting Qu,Quanyuan Zhang,Fan Cheng,Fuqiang Hu,Hai Liu,Zushun Xu,Chunli Gong
标识
DOI:10.1016/j.ijbiomac.2023.127796
摘要
Currently, achieving a simultaneous improvement in proton conductivity and mechanical properties is a key challenge in using chitosan (CS) as a proton exchange membrane (PEM) substrate in direct methanol fuel cells (DMFCs). Herein, a novel nanofiller–zwitterionic molecule, (3-(3-aminopropyl) dimethylammonio) propane-1-sulfonate, ADPS)-modified polydopamine (PDA) (PDA-ADPS) was synthesized by the Michael addition reaction and was incorporated into a CS matrix to prepare CS/PDA-ADPS composite membranes. PDA-ADPS, which contains an acid–based ion pair can create new proton conduction channels in the composite membrane, improving proton conductivity. The proton conductivity of the CS/PDA-ADPS composite membrane was as high as 38.4 mS cm−1 at 80 °C. Moreover, due to the excellent compatibility and dispersibility of PDA-ADPS in the CS matrix, the obtained CS/PDA-ADPS composite membranes exhibited favorable mechanical properties. Such outstanding proton conductivity and mechanical properties guarantee good performance of the composite membranes in fuel cells. The peak power density of the CS/PDA-ADPS composite membranes was 30.2 mW cm−2 at 70 °C. This work provides a new strategy for fabricating high-performance CS based PEMs for DMFCs.
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