# Electrochemical Potassiation/Depotassiation Properties of Rare-Earth Antimonide/Antimony Composite Electrodes

https://mdr.nims.go.jp/datasets/1ada6171-5853-41a5-8066-fcd52d5c7d92

## File

- [SI-KIB_RESb-Sb_Composite_250723ver.pdf](https://mdr.nims.go.jp/filesets/9b806f24-b169-42e2-9d51-ed29a18accc3/download) ([Detail](https://mdr.nims.go.jp/filesets/9b806f24-b169-42e2-9d51-ed29a18accc3.md))
- [MS-KIB_RESb-Sb_Composite_250723ver.pdf](https://mdr.nims.go.jp/filesets/1e8670d8-fb71-4084-8572-594817adedcb/download) ([Detail](https://mdr.nims.go.jp/filesets/1e8670d8-fb71-4084-8572-594817adedcb.md))

## Id

1ada6171-5853-41a5-8066-fcd52d5c7d92

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-01T23:56:54.357566Z

## Updated at

2025-12-02T07:30:04.225479Z

## Published at

2025-12-02T07:29:26.613638Z

## Doi

https://doi.org/10.48505/nims.5943

## First published url

https://doi.org/10.1021/acsaem.5c02478

## Date published

2025-11-10

## Recorded date published

2025-11-10

## Resource type

journal_article

## Manuscript type

authors_original

## Collection



## Title

- title: Electrochemical Potassiation/Depotassiation Properties of Rare-Earth Antimonide/Antimony
    Composite Electrodes
  title_type: original
  lang: en

## Description

- description: Potassium-ion batteries have emerged as promising next-generation energy
    storage systems because of the abundance and low cost of potassium. However, achieving
    high capacity and long-term cycling stability remains challenging, especially
    for metal/alloy anodes such as antimony (Sb), which suffers from considerable
    volume changes during charge–discharge cycling. To address this challenge, herein,
    composite anodes were prepared by combining Sb with rare earth antimonides (RESbx,
    RE = Y, La, Ce, Sm, or Gd), which are known for their charge–discharge cycling
    stability. The electrochemical performances of RESbx/Sb composite electrodes were
    systematically evaluated in an ionic liquid electrolyte. Charge–discharge testing
    revealed that RESbx addition, even at 10 wt %, considerably suppressed the rapid
    capacity fading observed in pure Sb electrodes, leading to excellent cycling stability.
    Additionally, pure Sb made the highest contribution to the capacity of the composite
    electrodes, and RESbx effectively suppressed electrode degradation. Specifically,
    the cycle life of the CeSb/Sb electrode was over three times longer than that
    of the pure Sb electrode. Cross-sectional scanning electron microscopy demonstrated
    that the RESbx phase mitigated electrode expansion and cracking. Further investigation
    showed that the high K+ diffusion coefficient of CeSb, larger lattice parameters
    of CeSb, and mechanical softness (lower breaking strength) of CeSb played key
    roles in increasing the cycle life of the CeSb/Sb electrode. These properties
    facilitated uniform K+ distribution and reduced mechanical stress in the CeSb/Sb
    electrode. Our findings help advance high-performance, resource-efficient energy
    storage technologies.
  description_type: abstract
  lang: und

## Creator

- name: Yasuhiro Domi
  role: author
  orcid: https://orcid.org/0000-0003-3983-2202
- name: Hiroyuki Usui
  role: author
  orcid: https://orcid.org/0000-0002-1156-0340
- name: Naoya Wada
  role: author
- name: Takayuki Yamamoto
  role: author
  orcid: https://orcid.org/0000-0003-3553-3272
- name: Toshiyuki Nohira
  role: author
  orcid: https://orcid.org/0000-0002-4053-554X
- name: Kei Nishikawa
  role: author
  orcid: https://orcid.org/0000-0002-7718-7606
- name: Hiroki Sakaguchi
  role: author
  orcid: https://orcid.org/0000-0002-4125-7182

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: potassium-ion batteries
  schema: not_defined

## Rights

- description: This document is the unedited Author’s version of a Submitted Work
    that was subsequently accepted for publication in ACS Applied Energy Materials,
    copyright © 2025 American Chemical Society after peer review. To access the final
    edited and published work see https://doi.org/10.1021/acsaem.5c02478.
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: ACS Applied Energy Materials
  issn: '25740962'
  volume: '8'
  issue: '21'
  start_page: 15952
  end_page: 15960

## Conference



## Related item



## Funding

- identifier: ZE2021A-28
  funder_name: Institute of Advanced Energy, Kyoto University
- identifier: ZE2022A-07
  funder_name: Institute of Advanced Energy, Kyoto University
- identifier: ZE2023A-21
  funder_name: Institute of Advanced Energy, Kyoto University
- identifier: 2021-19
  funder_name: National Institute for Materials Science
- identifier: 2022-33
  funder_name: National Institute for Materials Science

## 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: 9b806f24-b169-42e2-9d51-ed29a18accc3
  filename: SI-KIB_RESb-Sb_Composite_250723ver.pdf
  content_type: application/pdf
  size: 2710872
  md5: bdca3cff8b98d25fca05dd24ac4ad82a
- id: 1e8670d8-fb71-4084-8572-594817adedcb
  filename: MS-KIB_RESb-Sb_Composite_250723ver.pdf
  content_type: application/pdf
  size: 3304424
  md5: 6cce9557cb086c561a2633b4107d45e4

## Thumbnail

fileset_id: 9b806f24-b169-42e2-9d51-ed29a18accc3
filename: SI-KIB_RESb-Sb_Composite_250723ver.pdf