# Ultra‐Low‐Strain Calcium and Magnesium Ion Storage Enabled by Tunnel‐Structured MoO                    <sub>3</sub>                    Positive Electrode

https://mdr.nims.go.jp/datasets/8a290029-696d-4535-a90d-31aaedffa1ca

## File

- [91_Iimura_AENM_MoO3 for Mg and Ca storage.pdf](https://mdr.nims.go.jp/filesets/8eb62d6a-4629-4a1c-b470-c0b5350006fa/download) ([Detail](https://mdr.nims.go.jp/filesets/8eb62d6a-4629-4a1c-b470-c0b5350006fa.md))

## Id

8a290029-696d-4535-a90d-31aaedffa1ca

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-07-08T01:58:41.382245Z

## Updated at

2026-07-08T02:52:25.038555Z

## Published at

2026-07-08T05:26:12.577181Z

## Doi



## First published url

https://doi.org/10.1002/aenm.71006

## Date published

2026-04-28

## Recorded date published

2026-7

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: |-
    Ultra‐Low‐Strain Calcium and Magnesium Ion Storage Enabled by Tunnel‐Structured MoO
                        <sub>3</sub>
                        Positive Electrode
  title_type: original
  lang: en

## Description

- description: Rechargeable divalent batteries employing Ca or Mg metal negative electrodes
    have attracted considerable interest due to their low cost and potentially high
    energy density. However, the development of high-energy Ca and Mg batteries remains
    limited by the lack of oxide positive electrodes capable of reversibly accommodating
    divalent ions at room temperature. Here, we demonstrate a new positive electrode
    material, a nano-sized hexagonal tunnel-structured MoO3 (nano-h-MoO3), as a structurally
    robust host for both Ca2+ and Mg2+ storage, exhibiting markedly improved reversibility
    and capacities. Comprehensive structural analyses, supported by computational
    modeling, reveal a unique charge–discharge mechanism in which divalent-ion (de)insertion
    occurs through reversible modulation of host metal–oxygen bond lengths while retaining
    an intact host framework, resulting in minimal lattice expansion (< 2%). This
    structurally resilient tunnel-oxide design provides a promising pathway for developing
    high-energy, practical divalent metal battery systems.
  description_type: abstract
  lang: und

## Creator

- name: Reona Iimura
  role: author
  orcid: https://orcid.org/0009-0006-4791-918X
- name: M. D. Hashan C. Peiris
  role: author
  orcid: https://orcid.org/0000-0002-8706-452X
- name: Takashi Yabu
  role: author
  orcid: https://orcid.org/0009-0000-8127-6110
- name: Toshihiko Mandai
  role: author
  orcid: https://orcid.org/0000-0002-2403-7794
- name: Ruijie Zhu
  role: author
  orcid: https://orcid.org/0000-0001-5317-1151
- name: Akira Nasu
  role: author
  orcid: https://orcid.org/0009-0002-7779-5721
- name: Saneyuki Ohno
  role: author
  orcid: https://orcid.org/0000-0001-8192-996X
- name: Masaki Matsui
  role: author
  orcid: https://orcid.org/0000-0003-1499-7457
- name: Itaru Honma
  role: author
  orcid: https://orcid.org/0000-0002-6536-576X
- name: Manuel Smeu
  role: author
  orcid: https://orcid.org/0000-0001-9548-4623
- name: Hiroaki Kobayashi
  role: author
  orcid: https://orcid.org/0000-0001-6705-9515

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: Multivalent battery
  schema: not_defined
- subject: Positive electrode
  schema: not_defined
- subject: Low strain
  schema: not_defined
- subject: Tunnel structure
  schema: not_defined
- subject: Ion diffusion
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Advanced Energy Materials
  issn: '16146832'
  volume: '16'
  issue: '25'
  article_number: e71006

## Conference



## Related item



## Funding

- funder_name: Light Metal Educational Foundation
- identifier: '2138259'
  funder_name: National Science Foundation
- identifier: '2138286'
  funder_name: National Science Foundation
- identifier: '2138307'
  funder_name: National Science Foundation
- identifier: '2137603'
  funder_name: National Science Foundation
- identifier: '2138296'
  funder_name: National Science Foundation
- funder_name: Toyota Physical and Chemical Research Institute

## 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



## Software



## Custom property



## Fileset

- id: 8eb62d6a-4629-4a1c-b470-c0b5350006fa
  filename: 91_Iimura_AENM_MoO3 for Mg and Ca storage.pdf
  content_type: application/pdf
  size: 3345255
  md5: 3300d9f6d10cd384b78a90d8fa5f51b9

## Thumbnail

fileset_id: 8eb62d6a-4629-4a1c-b470-c0b5350006fa
filename: 91_Iimura_AENM_MoO3 for Mg and Ca storage.pdf