# Silicon-Based Nanocomposite Anodes with Excellent Cycle Life for Lithium-Ion Batteries Achieved by the Synergistic Effect of Two Silicides

https://mdr.nims.go.jp/datasets/3263b914-28b9-402b-b5ae-461b6c63b17e

## File

- [Domi_2024_J._Electrochem._Soc._171_080506.pdf](https://mdr.nims.go.jp/filesets/adaf6334-6e5c-4bb3-8017-139ce748081d/download) ([Detail](https://mdr.nims.go.jp/filesets/adaf6334-6e5c-4bb3-8017-139ce748081d.md))

## Id

3263b914-28b9-402b-b5ae-461b6c63b17e

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-11-28T01:11:40.318838Z

## Updated at

2024-12-06T08:17:37.177280Z

## Published at

2024-12-06T08:17:37.395237Z

## Doi



## First published url

https://doi.org/10.1149/1945-7111/ad69c6

## Date published

2024-08-01

## Recorded date published

2024-8-1

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Silicon-Based Nanocomposite Anodes with Excellent Cycle Life for Lithium-Ion
    Batteries Achieved by the Synergistic Effect of Two Silicides
  title_type: original
  lang: en

## Description

- description: Nanocomposite electrodes comprising LaSi2 and Si exhibit satisfactory
    charge–discharge cycling performances but their capacity is degraded after repeated
    cycles. A metallographic structure, in which the Si phase was finely dispersed
    in the LaSi2 matrix phase, was formed before cycling. The elastic LaSi2 relieved
    Si-generated stress and suppressed electrode disintegration. Contrarily, the LaSi2
    phase in the metallographic structure was surrounded by the Si matrix phase after
    cycling. The positional relationship between the two phases was reversed, and
    LaSi2 could not relieve the stress. For a nanocomposite electrode containing CrSi2,
    which exhibits stiffness to withstand the Si-generated stress, the structural
    changes were suppressed after cycling, resulting in good cycling stability. Here,
    we considered that the addition of stiff silicides as a third phase to the LaSi2/Si
    composite could improve the cycle life. Thus, this study prepared nanocomposite
    electrodes containing elastic LaSi2, stiff MSi2 (where M = Cr, Mo, Nb, Ta, Ti,
    or W), and elemental Si and investigated their electrochemical performances. Reaction
    behaviors, such as the metallographic structure, electrode thickness, and phase
    transition, were also clarified. The LaSi2/NbSi2/Si electrode exhibited the best
    cycle life without changes in its metallographic structure owing to the synergistic
    effect of stiff and elastic silicides.
  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: Takumi Okasaka
  role: author
- name: Kei Nishikawa
  role: author
  orcid: https://orcid.org/0000-0002-7718-7606
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Hiroki Sakaguchi
  role: author
  orcid: https://orcid.org/0000-0002-4125-7182

## Contact agent



## Publisher

organization: The Electrochemical Society

## Managing organization



## Keyword

- subject: Li-ion Battery
  schema: not_defined
- subject: Silicon alloy negative electrode
  schema: not_defined
- subject: LaSi2/NbSi2/Si electrode
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Journal of The Electrochemical Society
  issn: '00134651'
  volume: '171'
  issue: '8'
  article_number: '080506'

## Conference



## Related item



## Funding

- identifier: JP20H00399
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23K26758
  funder_name: Japan Society for the Promotion of Science
- identifier: JP24K08565
  funder_name: Japan Society for the Promotion of 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: adaf6334-6e5c-4bb3-8017-139ce748081d
  filename: Domi_2024_J._Electrochem._Soc._171_080506.pdf
  content_type: application/pdf
  size: 4199339
  md5: fdd8bc76e4110c0dce30ac81be641f29

## Thumbnail

fileset_id: adaf6334-6e5c-4bb3-8017-139ce748081d
filename: Domi_2024_J._Electrochem._Soc._171_080506.pdf