Open AccessBinder‐Free 3D Integrated Ni@Ni 3 Pt Air Electrode for Zn–Air Batteries
Author(s) -
Pham Thien Viet,
Li Yang,
Luo WenBin,
Guo HaiPeng,
Gao XuanWen,
Wang JiaZhao,
Liu HuaKun
Publication year - 2019
Publication title -
global challenges
Language(s) - English
Resource type - Journals
ISSN - 2056-6646
DOI - 10.1002/gch2.201900027
Subject(s) - materials science , electrode , electrolyte , battery (electricity) , zinc , porosity , chemical engineering , nickel , metallurgy , composite material , chemistry , power (physics) , physics , quantum mechanics , engineering
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.