# Nature of Li<sub>2</sub>O<sub>2</sub> and its relationship to the mechanisms of discharge/charge reactions of lithium–oxygen batteries

https://mdr.nims.go.jp/datasets/0476d031-62f4-45b9-b83c-923fb7691a10

## File

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## Id

0476d031-62f4-45b9-b83c-923fb7691a10

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-06-19T03:03:58.579821Z

## Updated at

2024-06-28T00:43:46.049792Z

## Published at

2024-06-19T23:30:34.819255Z

## Doi



## First published url

https://doi.org/10.1039/d4cp00428k

## Date published

2024-03-19

## Recorded date published

2024-5-8

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Nature of Li<sub>2</sub>O<sub>2</sub> and its relationship to the mechanisms
    of discharge/charge reactions of lithium–oxygen batteries
  title_type: original
  lang: en

## Description

- description: Lithium–air batteries (LABs) are considered one of the most promising
    energy storage devices because of their large theoretical energy density. However,
    low cyclability caused by battery degradation prevents its practical use. Thus,
    to realize practical LABs, it is essential to improve cyclability significantly
    by understanding how the degradation processes proceed. Here, we used online mass
    spectrometry for real-time monitoring of gaseous products generated during charging
    of lithium–oxygen batteries (LOBs), which was operated with pure oxygen not air,
    with 1 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) tetraethylene glycol
    dimethyl ether (TEGDME) electrolyte solution. Linear voltage sweep (LVS) and voltage
    step modes were employed for charge instead of constant current charge so that
    the energetics of the product formation during the charge process can be understood
    more quantitatively. The presence of two distinctly different types of Li2O2,
    one being decomposed in a wide range of relatively low cell voltages (2.8–4.16
    V) (l-Li2O2) and the other being decomposed at higher cell voltages than ca. 4.16
    V (h-Li2O2), was confirmed by both LVS and step experiments. H2O generation started
    when the O2 generation rate reached a first maximum and CO2 generation took place
    accompanied by the decomposition of h-Li2O2. Based on the above results and the
    effects of discharge time and the use of isotope oxygen during discharge on product
    distribution during charge, the generation mechanism of O2, H2O, and CO2 during
    charging is discussed in relation to the reactions during discharge.
  description_type: abstract
  lang: und

## Creator

- name: Yanan Gao
  role: author
  orcid: https://orcid.org/0000-0003-0217-6512
  organization: National Institute for Materials Science
- name: Hitoshi Asahina
  role: author
  orcid: https://orcid.org/0000-0002-1837-9077
  organization: National Institute for Materials Science
- name: Shoichi Matsuda
  role: author
  orcid: https://orcid.org/0000-0002-0640-3404
  organization: National Institute for Materials Science
- name: Hidenori Noguchi
  role: author
  orcid: https://orcid.org/0000-0001-9643-1689
  organization: National Institute for Materials Science
- name: Kohei Uosaki
  role: author
  orcid: https://orcid.org/0000-0001-8886-3270
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Royal Society of Chemistry (RSC)

## Managing organization



## Keyword

- subject: lithium oxygen battery
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Chemistry Chemical Physics
  issn: '14639084'
  volume: '26'
  issue: '18'
  start_page: 13655
  end_page: 13666

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## Chemical composition



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## Fileset

- id: 16542fbc-817f-4fdb-a366-e493c953f7e8
  filename: d4cp00428k (1).pdf
  content_type: application/pdf
  size: 3905969
  md5: 7193702e88dda40659536e4a2bfa54cd

## Thumbnail

fileset_id: 16542fbc-817f-4fdb-a366-e493c953f7e8
filename: d4cp00428k (1).pdf