# From lithium to proton mobility in garnet electrolytes: an NMR and conductivity study of H                    <sub>5.2</sub>                    Li                    <sub>1.3</sub>                    La                    <sub>3</sub>                    Zr                    <sub>1.5</sub>                    Ta                    <sub>0.5</sub>                    O                    <sub>12</sub>

https://mdr.nims.go.jp/datasets/f7d11c71-ead3-4b6a-b534-c72404985dbf

## File

- [d5ta09970f.pdf](https://mdr.nims.go.jp/filesets/5b95cc1c-d3a0-4eaa-a3cd-2768bf20d727/download) ([Detail](https://mdr.nims.go.jp/filesets/5b95cc1c-d3a0-4eaa-a3cd-2768bf20d727.md))

## Id

f7d11c71-ead3-4b6a-b534-c72404985dbf

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-05-27T07:41:33.391906Z

## Updated at

2026-05-28T01:05:54.748344Z

## Published at

2026-05-28T03:38:37.052898Z

## Doi



## First published url

https://doi.org/10.1039/d5ta09970f

## Date published

2026-04-15

## Recorded date published

2026-5-27

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: |-
    From lithium to proton mobility in garnet electrolytes: an NMR and conductivity study of H
                        <sub>5.2</sub>
                        Li
                        <sub>1.3</sub>
                        La
                        <sub>3</sub>
                        Zr
                        <sub>1.5</sub>
                        Ta
                        <sub>0.5</sub>
                        O
                        <sub>12</sub>
  title_type: original
  lang: en

## Description

- description: Garnet-type oxides are among the most promising solid-state electrolytes
    owing to their high chemical stability and comparatively high lithium-ion conductivity.
    They may also provide a basis for proton conductors through Li+/H+ exchange. In
    a recent 1H and 7Li NMR study, we showed that minor proton incorporation in single-crystalline
    garnets exerts only a weak influence on Li-ion diffusion. Here, we investigate
    the polycrystalline hydrogarnet H5.2Li1.3La3Zr1.5Ta0.5O12 (HLZTO), obtained by
    aqueous Li+/H+ exchange from Li6.5La3Zr1.5Ta0.5O12 (LLZTO). The precursor, synthesised
    at the remarkably low temperature of 600 °C, exhibits a large surface area enabling
    an efficient exchange process. X-ray diffraction reveals a slight lattice expansion
    upon protonation, while 6Li high-resolution MAS NMR and Raman spectroscopy indicate
    a pronounced alteration of the local Li environment. Thermogravimetric analysis
    shows a 5.5 wt% loss between 200 and 600 °C, consistent with the release of H2O.
    The total ionic conductivity of LLZTO is constrained by poor interparticle contact,
    whereas in HLZTO it drops sharply upon heating as protons are removed. Variable-temperature
    1H NMR relaxation reveals a diffusion-induced maximum between 125 and 180 °C,
    resulting in a self-diffusion coefficient D ≈ 1 × 10−15 m2 s−1 (ca. 150 °C). As
    seen by 7Li NMR, the remaining Li ions in HLZTO are almost immobile on the NMR
    time scale, revealing that proton motion dominates charge transport in HLZTO.
    While defects in LLZO promote localized motions, their healing appears to facilitate
    the establishment of long-range Li+ transport pathways.
  description_type: abstract
  lang: und

## Creator

- name: Florian Stainer
  role: author
  orcid: https://orcid.org/0000-0003-2072-2687
- name: Junji Akimoto
  role: author
  orcid: https://orcid.org/0000-0001-9636-7680
- name: Yoshitaka Matsushita
  role: author
  orcid: https://orcid.org/0000-0002-4968-8905
- name: Kazutaka Mitsuishi
  role: author
  orcid: https://orcid.org/0000-0002-9361-4057
- name: Kazunori Takada
  role: author
  orcid: https://orcid.org/0000-0001-7568-1806
- name: H. Martin R. Wilkening
  role: author
  orcid: https://orcid.org/0000-0001-9706-4892

## Contact agent



## Publisher

organization: Royal Society of Chemistry (RSC)

## Managing organization



## Keyword

- subject: garnet
  schema: not_defined
- subject: proton conductor
  schema: not_defined
- subject: NMR spectroscopy
  schema: not_defined
- subject: conductivity
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/3.0/

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Journal of Materials Chemistry A
  issn: '20507488'
  volume: '14'
  issue: '31'
  start_page: 20491
  end_page: 20503

## Conference



## Related item



## Funding

- identifier: JP24K08593
  funder_name: Japan Society for the Promotion of Science
- funder_name: National Institute for Materials Science
- funder_name: Ministry of Education, Culture, Sports, Science and Technology

## Instrument



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## Measurement method



## Specimen



## Chemical composition



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## Fileset

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  filename: d5ta09970f.pdf
  content_type: application/pdf
  size: 2089893
  md5: 200bef6b984e18a0694e28874a62e518

## Thumbnail

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