Selective Deposition of Ru Nanoparticles on TiSi2 Nanonet and Its Utilization for Li2O2 Formation and Decomposition
Citations Over TimeTop 10% of 2014 papers
Abstract
The Li-O2 battery promises high capacity to meet the need for electrochemical energy storage applications. Successful development of the technology hinges on the availability of stable cathodes. The reactivity exhibited by a carbon support compromises the cyclability of Li-O2 operation. A noncarbon cathode support has therefore become a necessity. Using a TiSi2 nanonet as a high surface area, conductive support, we obtained a new noncarbon cathode material that corrects the deficiency. To enable oxygen reduction and evolution, Ru nanoparticles were deposited by atomic layer deposition onto TiSi2 nanonets. A surprising site-selective growth whereupon Ru nanoparticles only deposit onto the b planes of TiSi2 was observed. DFT calculations show that the selectivity is a result of different interface energetics. The resulting heteronanostructure proves to be a highly effective cathode material. It enables Li-O2 test cells that can be recharged more than 100 cycles with average round-trip efficiencies >70%.
Related Papers
- → Spatial atomic layer deposition: A route towards further industrialization of atomic layer deposition(2011)373 cited
- → Characteristics and applications of plasma enhanced-atomic layer deposition(2011)103 cited
- → Atomic Layer Deposition Beyond Thin Film Deposition Technology(2022)59 cited
- → ALD: Atomic Layer Deposition – Precise and Conformal Coating for Better Performance(2014)14 cited
- → Application of atomic layer deposition in nanophotonics(2014)2 cited