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Binder-free and carbon-free 3D porous air electrode for Li-O2 batteries with high efficiency, high capacity, and long life

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posted on 2024-11-16, 09:33 authored by Wenbin Luo, Xuanwen Gao, Dongqi ShiDongqi Shi, Shulei Chou, Jiazhao WangJiazhao Wang, Hua LiuHua Liu
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.

Funding

Lithium-Ion Air Batteries with Non-Flammable Ionic Liquid–Based Electrolytes: A Platform to Safety in Lithium-Air Batteries

Australian Research Council

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History

Citation

Luo, W., Gao, X., Shi, D., Chou, S., Wang, J. & Liu, H. (2016). Binder-free and carbon-free 3D porous air electrode for Li-O2 batteries with high efficiency, high capacity, and long life. Small, 12 (22), 3031-3038.

Journal title

Small

Volume

12

Issue

22

Pagination

3031-3038

Language

English

RIS ID

107016

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