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Monodisperse Molybdenum Nanoparticles as Highly Efficient Electrocatalysts for Li-S Batteries

verfasst von
Yuping Liu, Atasi Chatterjee, Pascal Rusch, Chuanqiang Wu, Pengfei Nan, Manhua Peng, Frederik Bettels, Taoran Li, Chenxi Ma, Chaofeng Zhang, Binghui Ge, Nadja-Carola Bigall, H. Pfnur, Fei Ding, Lin Zhang
Abstract

Lithium-sulfur (Li-S) batteries have attracted widespread attention due to their high theoretical energy density. However, their practical application is still hindered by the shuttle effect and the sluggish conversion of lithium polysulfides (LiPSs). Herein, monodisperse molybdenum (Mo) nanoparticles embedded onto nitrogen-doped graphene (Mo@N-G) were developed and used as a highly efficient electrocatalyst to enhance LiPS conversion. The weight ratio of the electrocatalyst in the catalyst/sulfur cathode is only 9%. The unfilled d orbitals of oxidized Mo can attract the electrons of LiPS anions and form Mo–S bonds during the electrochemical process, thus facilitating fast conversion of LiPSs. Li-S batteries based on the Mo@N-G/S cathode can exhibit excellent rate performance, large capacity, and superior cycling stability. Moreover, Mo@N-G also plays an important role in room-temperature quasi-solid-state Li-S batteries. These interesting findings suggest the great potential of Mo nanoparticles in building high-performance Li-S batteries.

Organisationseinheit(en)
Institut für Festkörperphysik
Abt. Atomare und molekulare Strukturen (ATMOS)
Laboratorium für Nano- und Quantenengineering
AG Funktionale Nanostrukturen aus assemblierten kolloidalen Nanopartikeln
AG Katalyse und Membranen
Institut für Physikalische Chemie und Elektrochemie
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme
Externe Organisation(en)
Anhui University
Typ
Artikel
Journal
ACS NANO
Band
15
Seiten
15047-15056
Anzahl der Seiten
10
ISSN
1936-0851
Publikationsdatum
28.09.2021
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Werkstoffwissenschaften (insg.), Ingenieurwesen (insg.), Physik und Astronomie (insg.)
Elektronische Version(en)
https://doi.org/10.1021/acsnano.1c05344 (Zugang: Geschlossen)