Highly efficient lithium-ion exchange membrane water electrolysis

Lee, Yong-Soo; Mo, Yong-Hwan; Park, Deok‐Hye; Lee, Hak‐Joo; Lee, Woo‐Jun; Park, Hyun-Suk; Han, Sang-Beom; Park, Kyung‐Won

doi:10.1016/j.jpowsour.2022.231188

Cited by 8 publications

(9 citation statements)

References 53 publications

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“…The high electrolyte uptake ratio of the hydrophobic c-PES might have resulted from the hydrophilicity inside the pores. Therefore, c-PES with a smaller pore size can assist in the selective transport of Li + ions owing to the presence of cation exchange ionomers in c-PES …”

Section: Resultsmentioning

confidence: 99%

“…The Nafion-based Li-ion exchange polymer membranes were fabricated by mixing polyvinyl alcohol (PVA) and the Nafion ionomer to enhance the conductivity and adsorption of Li-ion. In single-cell measurements, lithium-ion exchange membrane WE exhibited a significantly higher current density (1.65 A cm –2 at 1.7 V) compared to AEMWE . However, the lithium-ion exchange membrane WE exhibited low stability owing to the hydrophilicity of PVA.…”

Section: Introductionmentioning

confidence: 95%

“…Hence, commercial proton exchange membranes (e.g., Nafion) for H + transport are not suitable for lithium-ion exchange membrane WE for Li + transport. 8 Herein, a lithium-ion exchange membrane was studied to enhance Li + ion transport. We previously reported lithium-ion exchange membrane WE using Nafion-based solid-state polymer electrolytes and LiOH as the alkaline solution.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In single-cell measurements, lithium-ion exchange membrane WE exhibited a significantly higher current density (1.65 A cm −2 at 1.7 V) compared to AEMWE. 8 However, the lithium-ion exchange membrane WE exhibited low stability owing to the hydrophilicity of PVA. In this study, a polyethersulfone (PES) membrane that is stable at high temperatures and in alkaline solutions was used by dipping it in a cationic aqueous solution to increase its Li-ion conductivity.…”

Section: ■ Introductionmentioning

confidence: 99%

“…However, hydrated Li + is faster than OH – . , Nevertheless, Li + ion has a larger ionic radius than H + ions. Hence, commercial proton exchange membranes (e.g., Nafion) for H + transport are not suitable for lithium-ion exchange membrane WE for Li + transport . Herein, a lithium-ion exchange membrane was studied to enhance Li + ion transport.…”

Section: Introductionmentioning

confidence: 99%

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Lithium-Ion Exchange Membrane Water Electrolysis Using a Cationic Polymer-Modified Polyethersulfone Membrane

Lee¹,

Park

et al. 2023

ACS Sustainable Chem. Eng.

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We previously reported lithium-ion exchange membrane water electrolysis using a commercial Nafion membrane for clean hydrogen production. In this study, a polyethersulfone (PES) membrane with high alkaline stability was dipped in a cationic aqueous solution to fabricate a PES-based membrane (c-PES membrane) as an alternative to Nafion. Compared with the commercial PES membrane, for the c-PES membrane, lithium ions can selectively transport from the anode to the cathode. Additionally, a high-porosity Ni-based porous transport layer (PTL) was used as an alternative to expensive Ti-PTL. Lithium-ion exchange membrane water electrolysis at 50 °C using c-PES membrane exhibited improved cell performance (1.13 A cm–2 @ 1.7 V) owing to lower ohmic and charge-transfer resistance, exhibiting the comparable performance to the reported water electrolysis systems. The carbonate formed during the process was effectively removed by injecting deionized water followed by H2SO4 solution, resulting in stable cell performance for 200 h.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%