Transferring lithium ions in the nanochannels of flexible metal-organic frameworks featuring superchaotropic metallacarborane guests: mechanism of ionic conductivity at atomic resolution

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F20%3A00533405" target="_blank" >RIV/61389013:_____/20:00533405 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/20:00533405

Result on the web

<a href="https://pubs.acs.org/doi/10.1021/acsami.0c12293" target="_blank" >https://pubs.acs.org/doi/10.1021/acsami.0c12293</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsami.0c12293" target="_blank" >10.1021/acsami.0c12293</a>

Result language

angličtina

Original language name

Transferring lithium ions in the nanochannels of flexible metal-organic frameworks featuring superchaotropic metallacarborane guests: mechanism of ionic conductivity at atomic resolution

Original language description

Metal–organic frameworks (MOFs), owing to their unique architecture, attract consistent attention in the design of high-performance Li battery materials. Here, we report a new category of ion-conducting crystalline materials for all-solid-state electrolytes based on an MIL53(Al) framework featuring a superchaotropic metallacarborane (Li+CoD–) salt and present the first quantitative data on Li+ ion sites, local dynamics, chemical exchange, and the formation of charge-transfer pathways. We used multinuclear solid-state nuclear magnetic resonance (ss-NMR) spectroscopy to examine the mechanism of ionic conductivity at atomic resolution and to elucidate order–disorder processes, framework–ion interactions, and framework breathing during the loading of Li+CoD– species and transfer of Li+ ions. In this way, the MIL53(Al)@LiCoD framework was found to adopt an open-pore conformation accompanied by a minor fraction of narrow-pore channels. The inserted Li+ ions have two states (free and bound), which both exhibit extensive motions. Both types of Li+ ions form mutually communicating chains, which are large enough to enable efficient long-range charge transfer and macroscopic conductivity. The superchaotropic anions undergo high-amplitude uniaxial rotation motions supporting the transfer of Li+ cations along them, while the fluctuations of MOF aromatic linkers support the penetration of Li+ through the channel walls. Our findings provide a detailed atomic-resolution insight into the mechanism of ionic conductivity and thus have significant implications for the design of the next generation of energy-related materials.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10404 - Polymer science

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ACS Applied Materials and Interfaces

ISSN

1944-8244

e-ISSN

—

Volume of the periodical

12

Issue of the periodical within the volume

42

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

47447-47456

UT code for WoS article

000584489800029

EID of the result in the Scopus database

2-s2.0-85094219898