---
_id: '9978'
abstract:
- lang: eng
  text: Redox mediators could catalyse otherwise slow and energy-inefficient cycling
    of Li-S and Li-O 2 batteries by shuttling electrons/holes between the electrode
    and the solid insulating storage materials. For mediators to work efficiently
    they need to oxidize the solid with fast kinetics yet the lowest possible overpotential.
    Here, we found that when the redox potentials of mediators are tuned via, e.g.,
    Li + concentration in the electrolyte, they exhibit distinct threshold potentials,
    where the kinetics accelerate several-fold within a range as small as 10 mV. This
    phenomenon is independent of types of mediators and electrolyte. The acceleration
    originates from the overpotentials required to activate fast Li + /e – extraction
    and the following chemical step at specific abundant surface facets. Efficient
    redox catalysis at insulating solids requires therefore carefully considering
    the surface conditions of the storage materials and electrolyte-dependent redox
    potentials, which may be tuned by salt concentrations or solvents.
acknowledgement: 'This work was financially supported by the National Natural Science
  Foundation of China (51773092, 21975124, 11874254, 51802187, U2030206). S.A.F. is
  indebted to IST Austria for support. '
article_processing_charge: No
author:
- first_name: Deqing
  full_name: Cao, Deqing
  last_name: Cao
- first_name: Xiaoxiao
  full_name: Shen, Xiaoxiao
  last_name: Shen
- first_name: Aiping
  full_name: Wang, Aiping
  last_name: Wang
- first_name: Fengjiao
  full_name: Yu, Fengjiao
  last_name: Yu
- first_name: Yuping
  full_name: Wu, Yuping
  last_name: Wu
- first_name: Siqi
  full_name: Shi, Siqi
  last_name: Shi
- first_name: Stefan Alexander
  full_name: Freunberger, Stefan Alexander
  id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
  last_name: Freunberger
  orcid: 0000-0003-2902-5319
- first_name: Yuhui
  full_name: Chen, Yuhui
  last_name: Chen
citation:
  ama: Cao D, Shen X, Wang A, et al. Sharp kinetic acceleration potentials during
    mediated redox catalysis of insulators. <i>Research Square</i>. doi:<a href="https://doi.org/10.21203/rs.3.rs-750965/v1">10.21203/rs.3.rs-750965/v1</a>
  apa: Cao, D., Shen, X., Wang, A., Yu, F., Wu, Y., Shi, S., … Chen, Y. (n.d.). Sharp
    kinetic acceleration potentials during mediated redox catalysis of insulators.
    <i>Research Square</i>. Research Square. <a href="https://doi.org/10.21203/rs.3.rs-750965/v1">https://doi.org/10.21203/rs.3.rs-750965/v1</a>
  chicago: Cao, Deqing, Xiaoxiao Shen, Aiping Wang, Fengjiao Yu, Yuping Wu, Siqi Shi,
    Stefan Alexander Freunberger, and Yuhui Chen. “Sharp Kinetic Acceleration Potentials
    during Mediated Redox Catalysis of Insulators.” <i>Research Square</i>. Research
    Square, n.d. <a href="https://doi.org/10.21203/rs.3.rs-750965/v1">https://doi.org/10.21203/rs.3.rs-750965/v1</a>.
  ieee: D. Cao <i>et al.</i>, “Sharp kinetic acceleration potentials during mediated
    redox catalysis of insulators,” <i>Research Square</i>. Research Square.
  ista: Cao D, Shen X, Wang A, Yu F, Wu Y, Shi S, Freunberger SA, Chen Y. Sharp kinetic
    acceleration potentials during mediated redox catalysis of insulators. Research
    Square, <a href="https://doi.org/10.21203/rs.3.rs-750965/v1">10.21203/rs.3.rs-750965/v1</a>.
  mla: Cao, Deqing, et al. “Sharp Kinetic Acceleration Potentials during Mediated
    Redox Catalysis of Insulators.” <i>Research Square</i>, Research Square, doi:<a
    href="https://doi.org/10.21203/rs.3.rs-750965/v1">10.21203/rs.3.rs-750965/v1</a>.
  short: D. Cao, X. Shen, A. Wang, F. Yu, Y. Wu, S. Shi, S.A. Freunberger, Y. Chen,
    Research Square (n.d.).
corr_author: '1'
date_created: 2021-08-31T12:54:16Z
date_published: 2021-08-18T00:00:00Z
date_updated: 2024-10-09T21:01:46Z
day: '18'
ddc:
- '541'
department:
- _id: StFr
doi: 10.21203/rs.3.rs-750965/v1
file:
- access_level: open_access
  checksum: 1878e91c29d5769ed5a827b0b7addf00
  content_type: application/pdf
  creator: cchlebak
  date_created: 2021-08-31T14:02:19Z
  date_updated: 2021-08-31T14:02:19Z
  file_id: '9979'
  file_name: 2021_ResearchSquare_Cao.pdf
  file_size: 1019662
  relation: main_file
  success: 1
file_date_updated: 2021-08-31T14:02:19Z
has_accepted_license: '1'
keyword:
- Catalysis
- Energy engineering
- Materials theory and modeling
language:
- iso: eng
month: '08'
oa: 1
oa_version: Preprint
page: '21'
publication: Research Square
publication_identifier:
  eissn:
  - 2693-5015
publication_status: submitted
publisher: Research Square
related_material:
  record:
  - id: '10813'
    relation: later_version
    status: public
status: public
title: Sharp kinetic acceleration potentials during mediated redox catalysis of insulators
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2021'
...