Journal
ISCIENCE
Volume 14, Issue -, Pages 36-+Publisher
CELL PRESS
DOI: 10.1016/j.isci.2019.03.013
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Funding
- National Natural Science Foundation of China [51771177, 21571075, 21621001, 21835002, 21673220]
- 111 Project [B17020]
- education department of Jilin Province [JJKH20190113KJ]
- Jilin Province Science and Technology Development Program [20190303104SF]
- Program for JLU Science and Technology Innovative Research Team
- Jilin Province/Jilin University Co-construction Project-Funds for New Materials [SXGJSF2017-3]
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The rapid and effective formation and decomposition of Li2O2 during cycling is crucial to solve the problems associated with the practical limitation of lithium-oxygen (Li-O-2) batteries. In this work, a highly dispersed electrocatalyst with Ru nanoclusters inside the special organic molecular cage (RuNCs@RCC3) through a reverse double-solvent method for Li-O-2 batteries has been proposed for the first time. This RuNCs@ORCC3 shows an effective catalyst enabling reversible formation and decomposition of the Li2O2 at the interface between the Li2O2 and the liquid electrolyte, rather than the sluggish solid-solid interface reactions on commonly used solid catalysts. As a result, the Li-O-2 cells with RuNCs@ORCC3 show enhanced electrochemical performance, including low overpotential (310 mV at a current density of 100 mA g(-1)), high specific capacity (15,068 mAh g(-1)), good rate capability (1,800 mAh g(-1) at a current density of 2.8 A g(-1)), and especially superior cycle stability up to 470 cycles.
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