Boosting the Cell Performance of the SiO/Cu and SiO/PPy Anodes via In-Situ Reduction/Oxidation Coating Strategies.
Chemistry
; 29(71): e202302369, 2023 Dec 19.
Article
em En
| MEDLINE
| ID: mdl-37721190
ABSTRACT
Silicon monoxide (SiO) has attracted great attention due to its high theoretical specific capacity as an alternative material for conventional graphite anode, but its poor electrical conductivity and irreversible side reactions at the SiO/electrolyte interface seriously reduce its cycling stability. Here, to overcome the drawbacks, the dicharged SiO anode coated with Cu coating layer is elaborately designed by in-situ reduction method. Compared with the pristine SiO anode of lithium-ion battery (293â
mAh g-1 at 0.5â
A g-1 after 200â
cycles), the obtained SiO/Cu composite presents superior cycling stability (1206â
mAh g-1 at 0.5â
A g-1 after 200â
cycles). The tight combination of Cu particles and SiO significantly improves the conductivity of the composite, effectively inhibits the side-reaction between the active material and electrolyte. In addition, polypyrrole-coated SiO composites are further prepared by in-situ oxidation method, which delivers a high reversible specific capacity of 1311â
mAh g-1 at 0.5â
A g-1 after 200â
cycles. The in-situ coating strategies in this work provide a new pathway for the development and practical application of high-performance silicon-based anode.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Chemistry
Assunto da revista:
QUIMICA
Ano de publicação:
2023
Tipo de documento:
Article