Polyoxomolybdate-Based Metal-Organic Framework-Derived Cu-Embedded Molybdenum Dioxide Hybrid Nanoparticles as Highly Efficient Electrocatalysts for Al-S Batteries.
ChemSusChem
; 17(19): e202400424, 2024 Oct 07.
Article
em En
| MEDLINE
| ID: mdl-38682649
ABSTRACT
High-performance rechargeable aluminum-sulfur batteries (RASB) have great potential for various applications owing to their high theoretical capacity, abundant sulfur resources, and good safety. Nevertheless, the practical application of RASB still faces several challenges, including the polysulfide shuttle phenomenon and low sulfur utilization efficiency. Here, we first developed a synergistic copper heterogeneous metal oxide MoO2 derived from polymolybdate-based metal-organic framework as an efficient catalyst for mitigating polysulfide diffusion. This composite enhances sulfur utilization and electrical conductivity of the cathode. DFT calculations and experimental results reveal the catalyst Cu/MoO2@C not only effectively anchors aluminum polysulfides (AlPSs) to mitigate the shuttle effect, but also significantly promotes the catalytic conversion of AlPSs on the sulfur cathode side during charging and discharging. The unique nanostructure contains abundant electrocatalytic active sites of oxide nanoparticles and Cu clusters, resulting in excellent electrochemical performance. Consequently, the established RASB exhibits an initial capacity of 875â
mAh g-1 at 500â
mA g-1 and maintains a capacity of 967â
mAh g-1 even at a high temperature of 50 °C.
Texto completo:
1
Base de dados:
MEDLINE
Idioma:
En
Revista:
ChemSusChem
/
ChemSusChem (Weinh., Internet)
/
ChemSusChem (Weinheim. Internet)
Assunto da revista:
QUIMICA
/
TOXICOLOGIA
Ano de publicação:
2024
Tipo de documento:
Article