Ultra-Large Sized Siloxene Nanosheets as Bifunctional Photocatalyst for a Li-O2 Battery with Superior Round-Trip Efficiency and Extra-Long Durability.
Angew Chem Int Ed Engl
; 60(20): 11257-11261, 2021 May 10.
Article
em En
| MEDLINE
| ID: mdl-33655589
ABSTRACT
Developing new optimized bifunctional photocatalyst is of great significant for achieving the high-performance photo-assisted Li-O2 batteries. Herein, a novel bifunctional photo-assisted Li-O2 system is constructed by using siloxene nanosheets with ultra-large size and few-layers due to its superior light harvesting, semiconductor characteristic, and low recombination rate. An ultra-low charge potential of 1.90â
V and ultra-high discharge of 3.51â
V have been obtained due to the introduction of this bifunctional photocatalyst into Li-O2 batteries, and these results have realized the round-trip efficiency up to 185 %. In addition, this photo-assisted Li-O2 batteries exhibits a high rate (129 % round-trip efficiency at 1â
mA cm-2 ), a prolonged cycling life with 92 % efficiency retention after 100â
cycles, and the highly reversible capacity of 1170â
mAh g-1 at 0.75â
mA cm-2 . This work will open the vigorous opportunity for high-efficiency utilization of solar energy into electric system.
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MEDLINE
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En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2021
Tipo de documento:
Article