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Title: Lithiation-induced non-noble metal nanoparticles for Li-O₂ batteries
Authors: Guo, Yuanyuan
Dai, Zhengfei
Lu, Jun
Zeng, Xiaoqiao
Yuan, Yifei
Bi, Xuanxuan
Ma, Lu
Wu, Tianpin
Yan, Qingyu
Amine, Khalil
Keywords: Engineering::Materials
Issue Date: 2019
Source: Guo, Y., Dai, Z., Lu, J., Zeng, X., Yuan, Y., Bi, X., Ma, L., Wu, T., Yan, Q. & Amine, K. (2019). Lithiation-induced non-noble metal nanoparticles for Li-O₂ batteries. ACS Applied Materials and Interfaces, 11(1), 811-818.
Project: RG113/15
EIRP 12/NRF2015EWT-EIRP002-008
Journal: ACS Applied Materials and Interfaces 
Abstract: Low-cost and highly active electrocatalysts are attractive for Li-O₂ applications. Herein, a 3D interconnected plate architecture consisting of ultrasmall Co-Ni grains embedded in lithium hydroxide nanoplates (Co₂Ni@LiOH) is designed and prepared by a lithiation strategy at room temperature. This catalyst exhibits a remarkably reduced charge potential of ∼3.4 V at 50 μA cm⁻², which leads to the high roundtrip efficiency of ∼79%, among the best levels reported and a cycle life of up to 40 cycles. The well-aligned network facilitates the oxygen diffusion and the electrolyte penetration into the electrode. The enhanced electrical conductivity network improves the charge transport kinetics and more active sites are exposed, which facilitate the adsorption and dissociation of oxygen during the oxygen reduction reaction and the oxygen evolution reaction. This new catalyst design inspires the development of an effective non-noble metal catalyst for Li-O₂ batteries.
ISSN: 1944-8244
DOI: 10.1021/acsami.8b17417
Rights: © 2018 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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