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Binder‐Free and Carbon‐Free 3D Porous Air Electrode for Li‐O 2 Batteries with High Efficiency, High Capacity, and Long Life
Author(s) -
Luo WenBin,
Gao XuanWen,
Shi DongQi,
Chou ShuLei,
Wang JiaZhao,
Liu HuaKun
Publication year - 2016
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201600699
Subject(s) - materials science , electrocatalyst , bifunctional , electrolyte , chemical engineering , current collector , electrode , lithium (medication) , carbon fibers , carbon nanofoam , catalysis , porosity , composite number , composite material , electrochemistry , chemistry , organic chemistry , medicine , engineering , endocrinology
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 O 2 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.