Premium
Ultra‐Large Sized Siloxene Nanosheets as Bifunctional Photocatalyst for a Li‐O 2 Battery with Superior Round‐Trip Efficiency and Extra‐Long Durability
Author(s) -
Jia Congying,
Zhang Feng,
She Liaona,
Li Qi,
He Xuexia,
Sun Jie,
Lei Zhibin,
Liu ZongHuai
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202101991
Subject(s) - bifunctional , photocatalysis , battery (electricity) , materials science , semiconductor , durability , nanotechnology , chemical engineering , optoelectronics , chemistry , composite material , organic chemistry , catalysis , power (physics) , physics , quantum mechanics , engineering
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 mA cm −2 ), a prolonged cycling life with 92 % efficiency retention after 100 cycles, and the highly reversible capacity of 1170 mAh g −1 at 0.75 mA cm −2 . This work will open the vigorous opportunity for high‐efficiency utilization of solar energy into electric system.