Mechanism study of functionalized graphene oxide on proton transport of polymer electrolyte membrane
Year: 2025
Type: article
Abstract: In this paper, based on the molecular design perspective, sulfonated poly (aryl ether ketone) sulfone containing carboxyl groups (C-SPAEKS) was synthesized. Next, graphene oxide nanosheets functionalized with 5-amino-1H-tetrazole (5-AT@GO) were prepared by amination reaction. By introducing 5-AT@GO to C-SPAEKS matrix, all proportions of composite membranes were successfully prepared. The 5-AT@GO was characterized and composite membranes were used for testing. The C-SPAEKS/5-AT@GO-1 composite membrane displayed the maximum proton conductivity (163.21 mS cm −1 at 80 °C), which was enhanced by 200.60% compared with the unmodified membrane (81.36 mS cm −1 at 80 °C). Furthermore, the water absorption reached 27.89% at 80 °C, and the swelling rate remained below 20%. The C-SPAEKS/5-AT@GO-1 composite membrane also exhibited good thermal stability , oxidation stability and electrochemical properties . At 80 °C, C-SPAEKS/5-AT@GO-1 composite membrane presented a peak power density of 810.71 mW/cm 2 , and the open circuit voltage (OCV) was 1.0015V. Compared with the pure membrane (0.8973V, 190.72 mW/cm 2 ), the peak power density was 4.25 times higher. After a 65-h durability test, OCV of the membrane showed a loss of 5%, specifically, the date dropped from 0.7429V to 0.7061V. The above results indicate that the 5-amino-1H-tetrazole-functionalized graphene oxide nanosheets successfully improved the overall performance of proton exchange membranes (PEMs).
Authors: Wei Fan, Pengyun Zhao, Kuirong Feng, Ziyi Wang, Litao Tian, Jingmei Xu
Institution: Changchun University of Technology
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,730
Awards: G1531960140, G5573344587, G67631393
OpenAlex ID: W4407856087