# Co-sintering Reaction Analysis of LiCoO<sub>2</sub> Cathodes and NASICON-Type LATP Solid Electrolytes Studied by Experimental and Computational Methods

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## Id

363d5ebb-27af-4907-9226-27020c614609

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-07-24T02:24:04.214640Z

## Updated at

2025-07-24T07:30:25.158989Z

## Published at

2025-07-24T07:18:13.788101Z

## Doi



## First published url

https://doi.org/10.1021/acs.jpcc.5c02329

## Date published

2025-07-17

## Recorded date published

2025-7-17

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Co-sintering Reaction Analysis of LiCoO<sub>2</sub> Cathodes and NASICON-Type
    LATP Solid Electrolytes Studied by Experimental and Computational Methods
  title_type: original
  lang: en

## Description

- description: LiCoO2 (LCO), a practical cathode material for Li-ion batteries, and
    Li1.3Al0.3Ti1.7(PO4)3 (LATP), an oxide-based solid electrolyte, were mixed at
    different ratios and cosintered at various temperatures. The reaction products
    in the crystalline and amorphous phases formed during sintering were quantitatively
    analyzed by X-ray diffraction (XRD) and X-ray absorption near edge structure (XANES).
    LCO and LATP reacted with each other to form Co3O4, Li3PO4, and amorphous-TiO2
    in either mixing ratios when sintering at relatively low temperatures (<500 °C).
    At the sintering temperatures between 500 and 900 °C, LiCoPO4, CoTiO3, and rutile-TiO2
    were formed for LCO and LATP at a volume ratio of 3:7; Co2TiO4, CoTiO3, and Co3O4
    at a volume ratio of 5:5; and Li2TiO3, Co2TiO4, and Co3O4 at a volume ratio of
    7:3. We conducted thermodynamic calculations of the same system at various temperatures
    under an oxygen partial pressure of 0.21 atm to compare with actual reaction products
    determined by XRD and XANES. At 900 °C, the experimentally observed actual reaction
    products were reasonably reproduced by the thermodynamic calculations except for
    a few discrepancies. The discrepancies between the identified reaction products
    and the predicted thermodynamically stable phases were attributed to (1) the formation
    of alternative phases that have Gibbs free energies comparable to the predicted
    most stable phases and (2) the occurrence of phase transformation of high temperature
    phases during the cooling process to perform product analysis at room temperature.
    Meanwhile, as the temperature became lower from 900 °C, discrepancies between
    experimental results and calculations became more prominent, so that the starting
    materials and reaction products increased and decreased, respectively, probably
    due to the slow kinetic process such as mutual diffusion as evidenced by elongating
    the sintering time and using smaller grain sizes.
  description_type: abstract
  lang: und

## Creator

- name: Fumihiko Ichihara
  role: author
- name: Shogo Miyoshi
  role: author
  orcid: https://orcid.org/0000-0003-0375-1187
- name: Machiko Ode
  role: author
  orcid: https://orcid.org/0000-0002-9500-5466
- name: Takuya Masuda
  role: author
  orcid: https://orcid.org/0000-0001-7462-2177

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: 共焼結
  schema: not_defined
- subject: 電解質／電極
  schema: not_defined
- subject: 接合
  schema: not_defined
- subject: 酸化物型全固体電池
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: The Journal of Physical Chemistry C
  issn: '19327447'
  volume: '129'
  issue: '28'
  article_number: acs.jpcc.5c02329

## Conference



## Related item



## Funding

- identifier: JPMXP0219207397
  funder_name: Ministry of Education, Culture, Sports, Science and Technology

## 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

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  filename: ichihara-et-al-2025-co-sintering-reaction-analysis-of-licoo2-cathodes-and-nasicon-type-latp-solid-electrolytes-studied.pdf
  content_type: application/pdf
  size: 7052855
  md5: 97dfd5f38e50418613f9d17a2d3252ad
- id: e7e18157-fb2d-4ae8-a277-d9dbe1131b51
  filename: jp5c02329_si_001.pdf
  content_type: application/pdf
  size: 4828073
  md5: 4cef03c3fd3406eca86fd451ac6f8779

## Thumbnail

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filename: ichihara-et-al-2025-co-sintering-reaction-analysis-of-licoo2-cathodes-and-nasicon-type-latp-solid-electrolytes-studied.pdf