Surface Self-Assembled Multi-Level NiFe-LDHs Integrated Super-Hydrophilic Diaphragms Enabling Efficient Alkaline Water Electrolysis for High Current Density and Durability | Sciact - CRIS-system of Boreskov Institute of Catalysis

Surface Self-Assembled Multi-Level NiFe-LDHs Integrated Super-Hydrophilic Diaphragms Enabling Efficient Alkaline Water Electrolysis for High Current Density and Durability Full article

Journal

Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212

Output data

Year: 2025, Volume: 510, Article number : 161697, Pages count : 13 DOI: 10.1016/j.cej.2025.161697

Tags

Alkaline water electrolysis; Porous diaphragm; NiFe-LDHs; Hydrophilic modulation; High current density; Durability

Authors

Luo Xi ¹ , Yang Xiaohui ¹ , Zhou Yongnan ¹ , Xu Nengneng ¹ , Yang Nianjun ³ , Zhang Quan ¹ , Liu Yuyu ⁴ , Kolokolov Daniil I. ^5,6 , Qiao Jinli ^1,2

Affiliations

1	State Key Laboratory of Advanced Fiber Materials, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
2	Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
3	Department of Chemistry & IMO-IMOMEC, Hasselt University, 3590 Diepenbeek, Belgium
4	Institute for Sustainable Energy, College of Sciences, Shanghai University, Shanghai 200444, China
5	Boreskov Institute of Catalysis SB RAS
6	Novosibirsk State University, 630090, Russia

Funding (3)

1	Ministry of Science and Technology of the People's Republic of China	2022YFE0138900
2	National Natural Science Foundation of China	21972017
3	Shanghai Municipality	19JC1410500

Alkaline water electrolysis is one of the most potential techniques for green hydrogen production, offering high energy conversion and storage. High current density and durability of diaphragms are crucial for electrochemical performance. Here, we have developed a high-performance composite diaphragm based on in-situ self-assembly of nickel–iron layered double hydroxides (NiFe-LDHs) loaded on Zirfon-type substrate, and at the same time, catalytic NiFe-LDHs integrated the anode side for high-performance alkaline water electrolysis. By modulating the microstructure, a unique surficial feature with high surface free energy and super-hydrophilicity to address the issue of high ohmic resistance is established and achieves rapid OH−conduction and high catalytic oxygen evolution reaction (OER). Consequently, the prepared ZLDH-χ series diaphragm affords excellent application properties, with a ZLDH-10 diaphragm with an ultra-short wetting time of 0.23 s and a reduction of 120 mV over-voltage in a single electrolytic cell. Electrolyzer with ZLDH-10 diaphragm provides exceptional current density of 1400 mA cm−2 at 2.0 V in 80°C 30 wt% KOH. Importantly, a large-scale ZLDH-10 diaphragm with 37 × 37 cm2 can be readily made and reaches unprecedented durability at 1000 mA cm−2@1.8 V over 240 h. Both the simple in-situ self-assembly approach and excellent performance of the ZLDH-χ series diaphragm pave a new way for manufacturing diaphragms in advanced alkaline water electrolysis. A partial polarization method was first invented to figure out the contribution ratio for cell voltage reduction between NiFe-LDHs catalytic effect and hydrophilic improving effect.

Luo X. , Yang X. , Zhou Y. , Xu N. , Yang N. , Zhang Q. , Liu Y. , Kolokolov D.I. , Qiao J.
Surface Self-Assembled Multi-Level NiFe-LDHs Integrated Super-Hydrophilic Diaphragms Enabling Efficient Alkaline Water Electrolysis for High Current Density and Durability
Chemical Engineering Journal. 2025. V.510. 161697 :1-13. DOI: 10.1016/j.cej.2025.161697 WOS Scopus OpenAlex

Submitted:	Dec 26, 2024
Accepted:	Mar 16, 2025
Published online:	Mar 17, 2025
Published print:	Apr 15, 2025

Web of science:	WOS:001467176900001
Scopus:	2-s2.0-105000324339
OpenAlex:	W4408520773

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