Graphite oxide-incorporated CeP₂O₇/BPO₄ solid composite electrolyte for high-temperature proton exchange membrane fuel cells

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• 作者：Xin Huang^a ; Yuming Deng^a ; ^b ; Chenxi Xu^a ; ^{xuchenxi31@126.com" class="auth_mail" title="E-mail the corresponding author} ; Yao Hu^a ; Liang Yang^a ; Paifeng Luo^a ; Yingwei Lu^a ; Jigui Cheng^a ; ^{jgcheng63@sina.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：High-temperature proton exchange membrane fuel cells ; Graphite oxide ; Inorganic composite membrane ; Boron phosphate
• 刊名：Fuel
• 出版年：2016
• 出版时间：1 September 2016
• 年：2016
• 卷：179
• 期：Complete
• 页码：299-304
• 全文大小：1023 K

文摘

Proton conductors capable of operating in a high temperature range (over 200 °C) have received great interest for proton exchange membrane fuel cells (PEMFCs). Here, we report promising candidates for inorganic composite membranes for PEMFCs using solid CeP₂O₇/BPO₄ and CeP₂O₇/BPO₄/GO (without a liquid phase) at temperatures between 200 °C and 300 °C. BPO₄ is prepared by combining a B₃PO₄ solution with an 85% H₃PO₄ solution, and it is loaded with CeP₂O₇. Furthermore, graphite oxide (GO) is incorporated with the CeP₂O₇/BPO₄-based composite materials to improve the proton conductivity. The structure and phase stability of the membranes are analysed by X-ray diffraction, Fourier transform infrared (FTIR) and thermos-gravimetric analysis (TGA), and the microstructure morphology is analysed by scanning electron microscopy (SEM). The CeP₂O₇/BPO₄ and CeP₂O₇/BPO₄/GO composite electrolytes exhibit the high proton conductivities of 0.12 S cm⁻¹ and 0.14 S cm⁻¹ at 250 °C, respectively. Moreover, the peak power densities of the CeP₂O₇/BPO₄/GO membrane are 149 mW cm⁻² at 200 °C, 240 mW cm⁻² at 250 °C and 184 mW cm⁻² at 300 °C.