Technical factors affecting the performance of anion exchange membrane water electrolyzer

Abstract

Anion exchange membrane (AEM) electrolysis is a promising membrane-based green hydrogen production technology. However, AEM electrolysis still remains in its infancy, and the performance of AEM electrolyzers is far behind that of well-developed alkaline and proton exchange membrane electrolyzers. Therefore, breaking through the technical barriers of AEM electrolyzers is critical. On the basis of the analysis of the electrochemical performance tested in a single cell, electrochemical impedance spectroscopy, and the number of active sites, we evaluated the main technical factors that affect AEM electrolyzers. These factors included catalyst layer manufacturing (e.g., catalyst, carbon black, and anionic ionomer) loadings, membrane electrode assembly, and testing conditions (e.g., the KOH concentration in the electrolyte, electrolyte feeding mode, and operating temperature). The underlying mechanisms of the effects of these factors on AEM electrolyzer performance were also revealed. The irreversible voltage loss in the AEM electrolyzer was concluded to be mainly associated with the kinetics of the electrode reaction and the transport of electrons, ions, and gas-phase products involved in electrolysis. Based on the study results, the performance and stability of AEM electrolyzers were significantly improved.

Keywords

hydrogen production / anion exchange membrane water electrolyzer / catalyst / membrane electrode assembly

References

[1] Yang YX, Li P, Zheng XB, et al. Anion-exchange membrane water electrolyzers and fuel cells. Chem. Soc. Rev., 2022, 51(23): 9620.

[2] Liu X, Liu GY, Xue JL, Wang XD, Li QF. Hydrogen as a carrier of renewable energies toward carbon neutrality: State-of-the-art and challenging issues. Int. J. Miner. Metall. Mater., 2022, 29(5): 1073.

[3] Guo JX, Zheng Y, Hu ZP, et al. Direct seawater electrolysis by adjusting the local reaction environment of a catalyst. Nat. Energy, 2023, 8(3): 264.

[4] Tong WM, Forster M, Dionigi F, et al. Electrolysis of low-grade and saline surface water. Nat. Energy, 2020, 5(5): 367.

[5] Du NY, Roy C, Peach R, Turnbull M, Thiele S, Bock C. Anion-exchange membrane water electrolyzers. Chem. Rev., 2022, 122(13): 11830.

[6] Kumar SS, Himabindu V. Hydrogen production by PEM water electrolysis — A review. Mater. Sci. Energy Technol., 2019, 2(3): 442.

[7] H. Nguyen, C. Klose, L. Metzler, S. Vierrath, and M. Breitwieser, Fully hydrocarbon membrane electrode assemblies for proton exchange membrane fuel cells and electrolyzers: An engineering perspective, Adv. Energy Mater., 12(2022), No. 12, art. No. 2103559.

[8] Q.C. Xu, L.Y. Zhang, J.H. Zhang, et al., Anion exchange membrane water electrolyzer: Electrode design, lab-scaled testing system and performance evaluation, EnergyChem, 4(2022), No. 5, art. No. 100087.

[9] Carmo M, Fritz DL, Mergel J, Stolten D. A comprehensive review on PEM water electrolysis. Int. J. Hydrogen Energy, 2013, 38(12): 4901.

[10] Sulaiman RRR, Wong WY, Loh KS. Recent developments on transition metal-based electrocatalysts for application in anion exchange membrane water electrolysis. Int. J. Energy Res., 2022, 46(3): 2241.

[11] Liu LH, Li N, Han JR, Yao KL, Liang HY. Multicomponent transition metal phosphide for oxygen evolution. Int. J. Miner. Metall. Mater., 2022, 29(3): 503.

[12] Li DG, Motz AR, Bae C, et al. Durability of anion exchange membrane water electrolyzers. Energy Environ. Sci., 2021, 14(6): 3393.

[13] Park JE, Kang SY, Oh SH, et al. High-performance anion-exchange membrane water electrolysis. Electrochim. Acta, 2019, 295, 99.

[14] I. Vincent, E.C. Lee, and H.M. Kim, Comprehensive impedance investigation of low-cost anion exchange membrane electrolysis for large-scale hydrogen production, Sci. Rep., 11(2021), No. 1, art. No. 293.

[15] C.Q. Li and J.B. Baek, The promise of hydrogen production from alkaline anion exchange membrane electrolyzers, Nano Energy, 87(2021), art. No. 106162.

[16] Kang SY, Park JE, Jang GY, et al. High-performance and durable water electrolysis using a highly conductive and stable anion-exchange membrane. Int. J. Hydrogen Energy, 2022, 47(15): 9115.

[17] Li DG, Park EJ, Zhu WL, et al. Highly quaternized polystyrene ionomers for high performance anion exchange membrane water electrolysers. Nat. Energy, 2020, 5(5): 378.

[18] Y.M. Dong, K. He, L. Yin, and A.M. Zhang, A facile route to controlled synthesis of Co₃O₄ nanoparticles and their environmental catalytic properties, Nanotechnology, 18(2007), No. 43, art. No. 435602.

[19] Z. Li, Y. Zhang, Y. Feng, et al., Co₃O₄ nanoparticles with ultrasmall size and abundant oxygen vacancies for boosting oxygen involved reactions, Adv. Funct. Mater., 29(2019), No. 36, art. No. 1903444.

[20] Esswein AJ, McMurdo MJ, Ross PN, Bell AT, Tilley TD. Size-dependent activity of Co₃O₄ nanoparticle anodes for alkaline water electrolysis. J. Phys. Chem. C, 2009, 113(33): 15068.

[21] Lettenmeier P, Kolb S, Sata N, et al. Comprehensive investigation of novel pore-graded gas diffusion layers for high-performance and cost-effective proton exchange membrane electrolyzers. Energy Environ. Sci., 2017, 10(12): 2521.

[22] Liu H, Tao HB, Liu B. Kinetic insights of proton exchange membrane water electrolyzer obtained by operando characterization methods. J. Phys. Chem. Lett., 2022, 13(28): 6520.

[23] Han B, Steen SM, Mo JK, Zhang FY. Electrochemical performance modeling of a proton exchange membrane electrolyzer cell for hydrogen energy. Int. J. Hydrogen Energy, 2015, 40(22): 7006.

[24] R.A. Krivina, G.A. Lindquist, S.R. Beaudoin, et al., Anode catalysts in anion-exchange-membrane electrolysis without supporting electrolyte: Conductivity, dynamics, and ionomer degradation, Adv. Mater., 34(2022), No. 35, art. No. 2203033.

[25] Alia SM, Ha MA, Ngo C, Anderson GC, Ghoshal S, Pylypenko S. Platinum-nickel nanowires with improved hydrogen evolution performance in anion exchange membrane-based electrolysis. ACS Catal., 2020, 10(17): 9953.

[26] Karthick K, Anantharaj S, Karthik PE, Subramanian B, Kundu S. Self-assembled molecular hybrids of CoS-DNA for enhanced water oxidation with low cobalt content. Inorg. Chem., 2017, 56(11): 6734.

[27] J.J. Liu, Z.Y. Kang, D.G. Li, et al., Elucidating the role of hydroxide electrolyte on anion-exchange-membrane water electrolyzer performance, J. Electrochem. Soc., 168(2021), No. 5, art. No. 054522.

[28] S. Siracusano, S. Trocino, N. Briguglio, V. Baglio, and A.S. Arico, Electrochemical impedance spectroscopy as a diagnostic tool in polymer electrolyte membrane electrolysis, Materials, 11(2018), No. 8, art. No. 1368.

[29] Dedigama I, Brett DJL, Mason TJ, Millichamp J, Shearing PR, Ayers KE. An electrochemical impedance spectroscopy study and two phase flow analysis of the anode of polymer electrolyte membrane water electrolyser. ECS Trans., 2015, 68(3): 117.

[30] Bernt M, Siebel A, Gasteiger HA. Analysis of voltage losses in PEM water electrolyzers with low platinum group metal loadings. J. Electrochem. Soc., 2018, 165(5): F305.

[31] Ma TY, Dai S, Jaroniec M, Qiao SZ. Metal-organic framework derived hybrid Co₃O₄-carbon porous nanowire arrays as reversible oxygen evolution electrodes. J. Am. Chem. Soc., 2014, 136(39): 13925.

[32] Li ZY, Ye KH, Zhong QS, Zhang CJ, Shi ST, Xu CW. Au-Co₃O₄/C as an efficient electrocatalyst for the oxygen evolution reaction. ChemPlusChem, 2014, 79(11): 1569.

[33] Chen PQ, Tai YX, Wu H, Gao YF, Chen JY, Cheng JG. Novel confinement combustion method of nanosized WC/C for efficient electrocatalytic oxygen reduction. Int. J. Miner. Metall. Mater., 2022, 29(8): 1627.

[34] Majasan JO, Cho JIS, Maier M, Dedigama I, Shearing PR, Brett DJL. Effect of anode flow channel depth on the performance of polymer electrolyte membrane water electrolyser. ECS Trans., 2018, 85(13): 1593.

[35] E. Cossar, A.O. Barnett, F. Seland, R. Safari, G.A. Botton, and E.A. Baranova, Ionomer content optimization in nickel-iron-based anodes with and without ceria for anion exchange membrane water electrolysis, J. Power Sources, 514(2021), art. No. 230563.

[36] Cossar E, Murphy F, Walia J, Weck A, Baranova EA. Role of ionomers in anion exchange membrane water electrolysis: Is aemion the answer for nickel-based anodes?. ACS Appl. Energy Mater., 2022, 5(8): 9938.

[37] Koch S, Heizmann PA, Kilian SK, et al. The effect of ionomer content in catalyst layers in anion-exchange membrane water electrolyzers prepared with reinforced membranes (Aemion+™). J. Mater. Chem. A, 2021, 9(28): 15744.

[38] Leonard E, Shum AD, Danilovic N, et al. Interfacial analysis of a PEM electrolyzer using X-ray computed tomography. Sustainable Energy Fuels, 2020, 4(2): 921.

[39] A. Kiessling, J.C. Fornaciari, G. Anderson, et al., Influence of supporting electrolyte on hydroxide exchange membrane water electrolysis performance: Anolyte, J. Electrochem. Soc., 168(2021), No. 8, art. No. 084512.

[40] Razmjooei F, Reißner R, Gago AS, Ansar A. Highly active binder free plasma sprayed non-noble metal electrodes for anion exchange membrane electrolysis at different reduced KOH concentrations. ECS Trans., 2019, 92(8): 689.

[41] J.K. Lee, C. Lee, and A. Bazylak, Pore network modelling to enhance liquid water transport through porous transport layers for polymer electrolyte membrane electrolyzers, J. Power Sources, 437(2019), art. No. 226910.

[42] Zhang DK, Zeng K. Evaluating the behavior of electrolytic gas bubbles and their effect on the cell voltage in alkaline water electrolysis. Ind. Eng. Chem. Res., 2012, 51(42): 13825.

[43] Cho MK, Park HY, Lee HJ, et al. Alkaline anion exchange membrane water electrolysis: Effects of electrolyte feed method and electrode binder content. J. Power Sources, 2018, 382, 22.

[44] Li DG, Matanovic I, Lee AS, et al. Phenyl oxidation impacts the durability of alkaline membrane water electrolyzer. ACS Appl. Mater. Interfaces, 2019, 11(10): 9696.

[45] Mohanty AD, Tignor SE, Krause JA, Choe YK, Bae C. Systematic alkaline stability study of polymer backbones for anion exchange membrane applications. Macromolecules, 2016, 49(9): 3361.

[46] S. Maurya, A.S. Lee, D.G. Li, et al., On the origin of permanent performance loss of anion exchange membrane fuel cells: Electrochemical oxidation of phenyl group, J. Power Sources, 436(2019), art. No. 226866.

[47] X. Hu, Y.D. Huang, L. Liu, et al., Piperidinium functionalized aryl ether-free polyaromatics as anion exchange membrane for water electrolysers: Performance and durability, J. Membr. Sci., 621(2021), art. No. 118964.