In Situ Formed Ir3Li Nanoparticles as Active Cathode Material in Li–Oxygen Batteries
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F19%3A00511372" target="_blank" >RIV/61388955:_____/19:00511372 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11104/0301654" target="_blank" >http://hdl.handle.net/11104/0301654</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpca.9b06875" target="_blank" >10.1021/acs.jpca.9b06875</a>
Alternative languages
Result language
angličtina
Original language name
In Situ Formed Ir3Li Nanoparticles as Active Cathode Material in Li–Oxygen Batteries
Original language description
Lithium–oxygen (Li–O2) batteries are a promising class of rechargeable Li batteries with a potentially very high achievable energy density. One of the major challenges for Li–O2 batteries is the high charge overpotential, which results in a low energy efficiency. In this work size-selected subnanometer Ir clusters are used to investigate cathode materials that can help control lithium superoxide formation during discharge, which has good electronic conductivity needed for low charge potentials. It is found that Ir particles can lead to lithium superoxide formation as the discharge product with Ir particle sizes of ∼1.5 nm giving the lowest charge potentials. During discharge these 1.5 nm Ir nanoparticles surprisingly evolve to larger ones while incorporating Li to form core–shell structures with Ir3Li shells, which probably act as templates for growth of lithium superoxide during discharge. Various characterization techniques including DEMS, Raman, titration, and HRTEM are used to characterize the LiO2 discharge product and the evolution of the Ir nanoparticles. Density functional calculations are used to provide insight into the mechanism for formation of the core–shell Ir3Li particles. The in situ formed Ir3Li core–shell nanoparticles discovered here provide a new direction for active cathode materials that can reduce charge overpotentials in Li–O2 batteries.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physical Chemistry A
ISSN
1089-5639
e-ISSN
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Volume of the periodical
123
Issue of the periodical within the volume
46
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
10047-10056
UT code for WoS article
000499738900016
EID of the result in the Scopus database
2-s2.0-85075172371