# State change of Na clusters in hard carbon electrodes and increased capacity for Na-ion batteries achieved by heteroatom doping

https://mdr.nims.go.jp/datasets/b86c8c69-3c87-41cc-bce7-e9d3eb1c169e

## File

- [CarbonTrends_2024_16_100387.pdf](https://mdr.nims.go.jp/filesets/4443fa36-7b1f-4032-bfac-8e9fcf57a1f8/download) ([Detail](https://mdr.nims.go.jp/filesets/4443fa36-7b1f-4032-bfac-8e9fcf57a1f8.md))

## Id

b86c8c69-3c87-41cc-bce7-e9d3eb1c169e

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-08-19T05:58:29.769263Z

## Updated at

2024-08-22T23:30:15.878152Z

## Published at

2024-08-22T23:30:15.949803Z

## Doi



## First published url

https://doi.org/10.1016/j.cartre.2024.100387

## Date published

2024-07-27

## Recorded date published

2024-9

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: State change of Na clusters in hard carbon electrodes and increased capacity
    for Na-ion batteries achieved by heteroatom doping
  title_type: original
  lang: en

## Description

- description: Although heteroatom doping is one of the effective methods to improve
    the capacity of hard carbon (HC) anode in Na-ion batteries (NIBs), the complicated
    structure of HCs makes it uncertain to understand the effects of heteroatom doping
    on sodium storage. In this study, we reveal the impact of phosphorus and sulfur
    doping to HC on sodium storage using solid-state NMR to improve the capacity of
    the HC prepared by the carbonization of resorcinol formaldehyde (RF) resin at
    1100C. The battery capacity of the HCs, especially plateau capacity, increased
    by heteroatom doping, whereas the interlayer distance of the carbon layers in
    the HCs did not expand significantly. 23Na solid-state NMR revealed that heteroatom
    doping facilitates the formation of quasi-metallic sodium clusters, contributing
    to the plateau capacity increase. The metallicity of the sodium clusters in heteroatom-doped
    HCs was controlled by the amount of doped-phosphorous. XPS and 31P NMR observed
    many phosphorous in carbon structure such as PR3 sites, and some oxidized phosphorous
    sites (-POx).
  description_type: abstract
  lang: und

## Creator

- name: Hideka Ando
  role: author
  orcid: https://orcid.org/0009-0004-1487-4478
- name: Kenjiro Hashi
  role: author
  orcid: https://orcid.org/0000-0002-0320-4768
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Shinobu Ohki
  role: author
  orcid: https://orcid.org/0000-0002-7357-3833
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Yoshikiyo Hatakeyama
  role: author
  orcid: https://orcid.org/0000-0002-2938-8980
- name: Yuta Nishina
  role: author
  orcid: https://orcid.org/0000-0002-4958-1753
- name: Norihiro Kowata
  role: author
- name: Takahiro Ohkubo
  role: author
  orcid: https://orcid.org/0000-0001-5907-3683
- name: Kazuma Gotoh
  role: author
  orcid: https://orcid.org/0000-0002-8197-5701

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: Na-ion batteries
  schema: not_defined
- subject: NMR
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Carbon Trends
  issn: '26670569'
  volume: '16'
  article_number: '100387'

## Conference



## Related item



## Funding

- funder_name: Japan Society for the Promotion of Science
- funder_name: Japan Science and Technology Agency

## 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: 4443fa36-7b1f-4032-bfac-8e9fcf57a1f8
  filename: CarbonTrends_2024_16_100387.pdf
  content_type: application/pdf
  size: 1847994
  md5: 540dddb009c0ec7fa214c9e6cd6f7465

## Thumbnail

fileset_id: 4443fa36-7b1f-4032-bfac-8e9fcf57a1f8
filename: CarbonTrends_2024_16_100387.pdf