Developing new optimized bifunctional photocatalyst is of great significant for achieving the high-performance photo-assisted Li-O 2 batteries. Herein, a novel bifunctional photo-assisted Li-O 2 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 1.90 V and ultra-high discharge of 3.51 V have been obtained due to the introduction of this bifunctional photocatalyst into Li-O 2 batteries, and these results have realized the round-trip efficiency up to 185 %. In addition, this photo-assisted Li-O 2 batteries exhibits a high rate (129 % round-trip efficiency at 1 mAcm À2 ), a prolonged cycling life with 92 % efficiency retention after 100 cycles, and the highly reversible capacity of 1170 mAh g À1 at 0.75 mA cm À2 . This work will open the vigorous opportunity for high-efficiency utilization of solar energy into electric system.

Borophene with 4 layers and lateral size of 5.05 μm can be prepared by liquid phase exfoliation.

No abstract

No abstract

In order to increase the capacity and improve the sluggish Na+-reaction kinetics of anodes as sodium ion capacitors (SICs), Ti2Nb2O9/CNF self-standing film electrode comprised of Ti2Nb2O9 nanosheets and carbon nanofibers...