Journal
MATTER
Volume 2, Issue 6, Pages 1494-1508Publisher
CELL PRESS
DOI: 10.1016/j.matt.2020.02.020
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Funding
- Beijing Natural Science Foundation [JQ18005]
- Tencent Foundation through the XPLORER PRIZE
- National Key R&D Program of China [2016YFB0100201]
- National Natural Science Foundation of China [51671003, 21771156]
- BIC-ESAT project
- Young Thousand Talented Program
- Early Career Scheme (ECS) fund from the Research Grant Council (RGC) in Hong Kong [PolyU 253026/16P]
- US DOE Office of Science Facility, at Brookhaven National Laboratory [DE-SC0012704]
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The aprotic Li-CO2 batterywith high energy density is an attractive energy-storage technology. However, its development is largely impeded by the sluggish kinetics of CO2 reduction and evolution reactions. Here, we demonstrate a class of ultrathin triangular RuRh alloy nanosheets as an exceptionally active catalyst for greatly accelerating the kinetics of CO2 reduction and evolution reactions and achieving a high-performance Li-CO2 battery. The RuRh alloy nanosheets-based battery can achieve the lowest voltage gap of 1.35 V during the charge-discharge process and stably cycle for 180 cycles with a cutoff capacity of 1,000mAh g(-1) at 1,000mA g(-1). Density functional theory calculations demonstrate the pivotal roles of Rh introduction in RuRh alloy nanosheets, which evidently activate the electron-transfer ability of surface Ru and balance the CO2 binding near Ru sites. We find that the d-d correlation between Rh and Ru contributes to the energetically favorable cycle of the Li-CO2 battery.
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