Binder-Free and Carbon-Free 3D Porous Air Electrode for Li-O2 Batteries with High Efficiency, High Capacity, and Long Life.
Pt-Gd alloy polycrystalline thin film is deposited on 3D nickel foam by pulsed laser deposition method serving as a whole binder/carbon-free air electrode, showing great catalytic activity enhancement as an efficient bifunctional catalyst for the oxygen reduction and evolution reactions in lithium oxygen batteries. The porous structure can facilitate rapid O2 and electrolyte diffusion, as well as forming a continuous conductive network throughout the whole energy conversion process. It shows a favorable cycle performance in the full discharge/charge model, owing to the high catalytic activity of the Pt-Gd alloy composite and 3D porous nickel foam structure. Specially, excellent cycling performance under capacity limited mode is also demonstrated, in which the terminal discharge voltage is higher than 2.5 V and the terminal charge voltage is lower than 3.7 V after 100 cycles at a current density of 0.1 mA cm(-2) . Therefore, this electrocatalyst is a promising bifunctional electrocatalyst for lithium oxygen batteries and this depositing high-efficient electrocatalyst on porous substrate with polycrystalline thin film by pulsed laser deposition is also a promising technique in the future lithium oxygen batteries research.
Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW, 2522, Australia.
Wen-Bin
WB
Luo
Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW, 2522, Australia.
Xuan-Wen
XW
Gao
Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW, 2522, Australia.
Dong-Qi
DQ
Shi
Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW, 2522, Australia.
Shu-Lei
SL
Chou
Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW, 2522, Australia.
Jia-Zhao
JZ
Wang
Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW, 2522, Australia.
Hua-Kun
HK
Liu
Li-O2 batteries; PtGd alloys; oxygen reduction reaction; polycrystalline thin films; pulsed laser deposition