Binder-Free 3D Integrated Ni@Ni 3 Pt Air Electrode for Zn-Air Batteries.

Autor: Pham TV; Institute for Superconducting and Electronic Materials University of Wollongong Wollongong NSW 2522 Australia., Li Y; Institute for Superconducting and Electronic Materials University of Wollongong Wollongong NSW 2522 Australia., Luo WB; Institute for Superconducting and Electronic Materials University of Wollongong Wollongong NSW 2522 Australia., Guo HP; Institute for Superconducting and Electronic Materials University of Wollongong Wollongong NSW 2522 Australia., Gao XW; Institute for Superconducting and Electronic Materials University of Wollongong Wollongong NSW 2522 Australia., Wang JZ; Institute for Superconducting and Electronic Materials University of Wollongong Wollongong NSW 2522 Australia., Liu HK; Institute for Superconducting and Electronic Materials University of Wollongong Wollongong NSW 2522 Australia.
Jazyk: angličtina
Zdroj: Global challenges (Hoboken, NJ) [Glob Chall] 2019 Jun 27; Vol. 3 (9), pp. 1900027. Date of Electronic Publication: 2019 Jun 27 (Print Publication: 2019).
DOI: 10.1002/gch2.201900027
Abstrakt: Developing an air electrode with high efficiency and stable performance is essential to improve the energy conversion efficiency and lifetime of zinc-air battery. Herein, Ni 3 Pt alloy is deposited on 3D nickel foam by a pulsed laser deposition method, working as a stable binder-free air electrode for rechargeable zinc-air batteries. The polycrystalline Ni 3 Pt alloy possesses high oxygen-conversion catalytic activity, which is highly desirable for the charge and discharge process in zinc-air battery. Meanwhile, this sample technique constructs an integrated and stable electrode structure, which not only has a 3D architecture of high conductivity and porosity but also produces a uniform Ni 3 Pt strongly adhering to the substrate, favoring rapid gas and electrolyte diffusion throughout the whole energy conversion process. Employed as an air electrode in zinc-air batteries, it exhibits a small charge and discharge gap of below 0.62 V at 10 mA cm -2 , with long cycle life of 478 cycles under 10 min per cycle. Furthermore, benefitting from the structural advantages, a flexible device exhibits similar electrochemical performance even under the bending state. The high performance resulting from this type of integrated electrode in this work paves the way of a promising technique to fabricate air electrodes for zinc-air batteries.
Competing Interests: The authors declare no conflict of interest.
(© 2019 University of Wollongong. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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