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State-independent ionic conductivity

Abstract:
Liquids lend themselves to high ionic conductivities because of their molecular-level positional and orientational disorder, which enables the free movement of ions. However, there is an unavoidable steep drop in ionic conductivity upon phase transitions from a fluid state to the more ordered solid state. We describe organic salts that maintain the same ionic conductivity mechanism across transitions between three states of matter, from an initial isotropic liquid to liquid crystalline state and then to a crystalline solid. We achieve this property by minimizing the ion-pairing interactions between mobile ions and highly diffuse counterions that assemble in a stepwise manner to preserve conformational flexibility across phase transitions. This state-independent ionic conductivity opens up opportunities to exploit liquid-like ionic conductivity in organic solids.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1126/science.adk0786

Authors

More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Chemistry
Sub department:
Organic Chemistry
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Chemistry
Sub department:
Organic Chemistry
Oxford college:
Merton College
Role:
Author
ORCID:
0000-0002-8538-7579
et al.


Publisher:
American Association for the Advancement of Science
Journal:
Science More from this journal
Volume:
390
Issue:
6779
Pages:
1254-1258
Publication date:
2025-12-18
Acceptance date:
2025-10-21
DOI:
EISSN:
1095-9203
ISSN:
0036-8075


Language:
English
Pubs id:
2301601
Local pid:
pubs:2301601
Deposit date:
2025-10-24
ARK identifier:

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