# Monolayer LDH nanosheet / quaternized polymer composite membranes with enhanced anion conductivity and alkaline durability for water electrolysis

https://mdr.nims.go.jp/datasets/664450d4-9a66-41bc-8bed-3fab748a3654

## File

- [Final version.docx](https://mdr.nims.go.jp/filesets/6658d44d-8138-44e1-bf1f-56ac2ebb41a5/download) ([Detail](https://mdr.nims.go.jp/filesets/6658d44d-8138-44e1-bf1f-56ac2ebb41a5.md))

## Id

664450d4-9a66-41bc-8bed-3fab748a3654

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-01-21T02:37:36.307698Z

## Updated at

2026-04-30T03:01:11.491392Z

## Published at

2026-10-12T23:28:21.898126Z

## Doi

https://doi.org/10.48505/nims.6131

## First published url

https://doi.org/10.1039/d5ta06131h

## Date published

2025-10-13

## Recorded date published

2026-1-20

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Monolayer LDH nanosheet / quaternized polymer composite membranes with enhanced
    anion conductivity and alkaline durability for water electrolysis
  title_type: original
  lang: en

## Description

- description: "Anion exchange membranes (AEMs) with high ion conductivity and alkaline
    resistance are of importance for achieving high performance and long-term durability
    of anion exchange membrane water electrolyzers (AEMWEs) and anion exchange membrane
    fuel cells (AEMFCs). In the present work, we have developed a series of composite
    membranes composed of inorganic two-dimensional (2D) layered double hydroxide
    nanosheets (LDH NS), with intrinsic alkaline stability and high hydroxide ion
    conductivity (approaching 10−1 S cm−1), and our original partially fluorinated,
    quaternized polymer-based copolymers (QPAF-4) via a facile solution-casting process.
    The obtained organic/inorganic composite membranes (QPAF-4/LDH NS) exhibited excellent
    mechanical properties, characterized with a maximum elongation over 300%. A high
    hydroxide ion conductivity (102.0 mS cm−1) was achieved on an optimized percentage
    of LDH NS at 3 wt%. The hydroxyl groups on the surface of the LDH NS provided
    strong hydrogen bonds and highly dense Grotthuss conduction sites, which were
    responsible for good compatibility with the QPAF-4 matrix, contributing to high
    mechanical strength and high ion conductivity. Furthermore, the LDH nanosheets
    mitigated the chemical degradation of the ammonium groups of QPAF-4. As a result,
    a high retention of 80% conductivity was realized for the composite AEMs under
    harsh alkaline conditions (8 M KOH at 80 °C for 1000 h) compared to only 43% for
    the pristine QPAF-4 membranes under the same conditions. Furthermore, an alkaline
    water electrolysis cell was\r\nconstructed by combining the optimized QPAF-4/LDH
    NS composite membrane with an Ni2/3Fe1/3 LDHrGO anode catalyst, which delivered
    a current density of 1 A cm−2 at 1.61 V (76.4% voltage efficiency), outperforming
    state-of-the-art AEM electrolysis systems."
  description_type: abstract
  lang: und

## Creator

- name: Fang Xian
  role: author
  orcid: https://orcid.org/0000-0003-3005-4352
- name: Kenji Miyatake
  role: author
  orcid: https://orcid.org/0000-0001-5713-2635
- name: Fanghua Liu
  role: author
- name: Lin Guo
  role: author
  orcid: https://orcid.org/0000-0002-2880-1753
- name: Ahmed Mohamed Ahmed Mahmoud
  role: author
- name: Vikrant Yadav
  role: author
- name: Toshio Iwataki
  role: author
- name: Makoto Uchida
  role: author
  orcid: https://orcid.org/0000-0002-7847-3727
- name: Renzhi Ma
  role: author
  orcid: https://orcid.org/0000-0001-7126-2006

## Contact agent



## Publisher

organization: Royal Society of Chemistry (RSC)

## Managing organization



## Keyword

- subject: Water electrolysis
  schema: not_defined
- subject: LDH nanosheet
  schema: not_defined
- subject: Membrane
  schema: not_defined
- subject: Anion conductivity
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2025-10-13
end_date: 2026-10-13

## Journal

- title: Journal of Materials Chemistry A
  issn: '20507488'
  volume: '14'
  issue: '5'
  start_page: 2700
  end_page: 2709

## Conference



## Related item



## Funding

- funder_name: Toshiaki Ogasawara Memorial Foundation
- identifier: JPMXP1122712807
  funder_name: Ministry of Education, Culture, Sports, Science and Technology

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Fileset

- id: 6658d44d-8138-44e1-bf1f-56ac2ebb41a5
  filename: Final version.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 3559819
  md5: 063db054f6d4793ea7ab20f6a7ea39b0

## Thumbnail

fileset_id: 6658d44d-8138-44e1-bf1f-56ac2ebb41a5
filename: Final version.docx