3.Preparation and performance of modified ceriumoxide-doped PBI membranes
Author: JI Zhunze 1，4 ，PAN Gaofei 1 ，WANG Huixuan 1 ，CAO Hongzhang 4 ，YU Xiaoli 4 ，WANG Hui 4 ，BAO Jinxiao 1，2，
Abstract:
The contemporary plasmonic membrane exchange membranes still have deficiencies，such as low electrochemical perform-ance，low acid adsorption，poor acid retention capacity，and poor mechanical properties． The nanospherical cerium oxide was preparedby hydrothermal method and surface modified using coupling agent to obtain carboxyl-modified cerium oxide，and finally doped with PBIby solution casting method to obtain composite film． The proton conductivity of the optimally doped composite films was ( 0． 048 69 ～0． 117 81 S·cm － 1 ) increased by 54% ～ 72% over the temperature range of 80 ～ 160 °C compared with that of the pristine PBI( 0． 031 59 ～ 0． 068 72 S · cm － 1 ) and the performance of the single-cell at 140 °C showed that the peak power density reached385． 86 mW·cm － 2 ． Compared with the 329． 75 mW·cm － 2 of pure PBI plasmonic film，the performance of modified cerium oxidedoped PBI plasmonic film has an improvement of 20% and possesses better performance compared with SiO 2 doped PBI plasmonic filmwith a peak power density of 320 mW·cm － 2 ．
Keywords: fuel cell; polybenzimidazole; modified cerium oxide; composite membrane
Full Text Link: https://link.cnki.net/doi/10.16559/j.cnki.2095-2295.2025.03.003