Synthesis of porous carbon supported palladium nanoparticle catalysts by atomic layer deposition: application for rechargeable lithium-O2 battery.
In this study, atomic layer deposition (ALD) was used to deposit nanostructured palladium on porous carbon as the cathode material for Li-O2 cells. Scanning transmission electron microscopy showed discrete crystalline nanoparticles decorating the surface of the porous carbon support, where the size could be controlled in the range of 2-8 nm and depended on the number of Pd ALD cycles performed. X-ray absorption spectroscopy at the Pd K-edge revealed that the carbon supported Pd existed in a mixed phase of metallic palladium and palladium oxide. The conformality of ALD allowed us to uniformly disperse the Pd catalyst onto the carbon support while preserving the initial porous structure. As a result, the charging and discharging performance of the oxygen cathode in a Li-O2 cell was improved. Our results suggest that ALD is a promising technique for tailoring the surface composition and structure of nanoporous supports in energy storage devices.
Energy Systems Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.
Yu
Y
Lei
Jun
J
Lu
Xiangyi
X
Luo
Tianpin
T
Wu
Peng
P
Du
Xiaoyi
X
Zhang
Yang
Y
Ren
Jianguo
J
Wen
Dean J
DJ
Miller
Jeffrey T
JT
Miller
Yang-Kook
YK
Sun
Jeffrey W
JW
Elam
Khalil
K
Amine
D002384:Catalysis; D011211:Electric Power Supplies; D008094:Lithium / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D010165:Palladium / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties
D010165:Palladium; D008094:Lithium; D010100:Oxygen