# New insight into designing a thick-sintered cathode for Li-ion batteries: the impact of excess lithium in LiCoO<sub>2</sub> on its electrode performance

https://mdr.nims.go.jp/datasets/bbb5b66e-db1e-427d-bb0f-ddb7dcece963

## File

- [d4ta07377k.pdf](https://mdr.nims.go.jp/filesets/2cfabda6-e9ef-4351-9c50-5661fb31c563/download) ([Detail](https://mdr.nims.go.jp/filesets/2cfabda6-e9ef-4351-9c50-5661fb31c563.md))

## Id

bbb5b66e-db1e-427d-bb0f-ddb7dcece963

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-12-23T06:03:00.395561Z

## Updated at

2024-12-24T04:58:53.168527Z

## Published at

2025-02-17T09:32:29.271159Z

## Doi



## First published url

https://doi.org/10.1039/d4ta07377k

## Date published

2024-12-06

## Recorded date published

2025-1-21

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: 'New insight into designing a thick-sintered cathode for Li-ion batteries:
    the impact of excess lithium in LiCoO<sub>2</sub> on its electrode performance'
  title_type: original
  lang: en

## Description

- description: Increasing the capacity of Li-ion batteries is one of the critical
    issues that must be addressed. A thick and dense electrode using an active material
    sintered disk is expected to have a high capacity because the volume of the active
    material is 100% in the cathode. This study focused on LiCoO2, the most well-known
    active material for the cathode, to improve the properties of the sintered cathode.
    We investigated the impact of excess Li on various properties. We found that the
    degree of c-axis orientation in the sintered disk decreased as excess Li increased.
    In addition, results of 7Li-MAS-NMR suggest the presence of defects resulting
    from excess Li when the Li excess reached 5.1% or more. The discharge capacity
    of the LiCoO2 sintered cathode increased as the amount of excess Li increased,
    and a maximum discharge capacity of 11.2 mA h cm−2 was obtained when the Li excess
    amount was 7.3%. This result was attributed to the significant improvement in
    the Li-ion conductivity of LiCoO2 by both the decrease in the degree of c-axis
    orientation and the introduction of defects due to excess Li. Notably, introducing
    defects derived from excess Li enhances the Li-ion conductivity. Thus, tuning
    the amount of excess Li for the LiCoO2 sintered cathode was crucial in enhancing
    its electrochemical performance as an electrode.
  description_type: abstract
  lang: und

## Creator

- name: Shinichi Takeno
  role: author
- name: Taiki Suematsu
  role: author
- name: Ryusei Kunisaki
  role: author
- name: Gen Hasegawa
  role: author
  orcid: https://orcid.org/0000-0002-9297-6902
- name: Ken Watanabe
  role: author
  orcid: https://orcid.org/0000-0001-7374-7322
- name: Naoaki Kuwata
  role: author
  orcid: https://orcid.org/0000-0002-0736-6967
- name: Kazutaka Mitsuishi
  role: author
  orcid: https://orcid.org/0000-0002-9361-4057
- name: Tsuyoshi Ohnishi
  role: author
  orcid: https://orcid.org/0000-0002-2333-7752
- name: Kazunori Takada
  role: author
  orcid: https://orcid.org/0000-0001-7568-1806
- name: Kohichi Suematsu
  role: author
- name: Kengo Shimanoe
  role: author

## Contact agent



## Publisher

organization: Royal Society of Chemistry (RSC)

## Managing organization



## Keyword

- subject: Li-ion battery
  schema: not_defined

## Rights

- identifier: cc-by-3.0

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Journal of Materials Chemistry A
  issn: '20507488'

## Conference



## Related item



## Funding

- identifier: JPMJGX23S22
  funder_name: Japan Science and Technology Corporation
- funder_name: National Institute for Materials Science
- identifier: 22K04739
  funder_name: Japan Society for the Promotion of Science
- identifier: JPMJAL1301
  funder_name: Japan Science and Technology Corporation
- identifier: JPMJFS2132
  funder_name: Japan Science and Technology Corporation
- funder_name: Advanced Low Carbon Technology Research and Development Program

## Instrument



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## Measurement method



## Specimen



## Chemical composition



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## Fileset

- id: 2cfabda6-e9ef-4351-9c50-5661fb31c563
  filename: d4ta07377k.pdf
  content_type: application/pdf
  size: 649952
  md5: 91890071097425be07f7480a4df79ac2

## Thumbnail

fileset_id: 2cfabda6-e9ef-4351-9c50-5661fb31c563
filename: d4ta07377k.pdf