Toggle Main Menu Toggle Search

Open Access padlockePrints

Highly dispersed silver nanoparticles for performance-enhanced lithium oxygen batteries

Lookup NU author(s): Dr Kui Zhang, Professor Kun Luo

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Abstract

© 2020. Aprotic lithium-oxygen batteries possess ultrahigh energy density but suffer from the sluggish decomposition of discharge product, quick depletion of Li anode and cleavage of electrolyte, in close association with oxygen reduction reaction at the cathode. Herein, highly dispersed silver nanoparticles are used to enhance the lithium-oxygen battery with 1.0 M lithium perchlorate in dimethyl sulfoxide. It is observed that film-like amorphous lithium peroxide is formed through surface pathway instead of bulk crystals, due to the incorporation of silver nanoparticles dispersed in the electrolyte, which subsequently accelerates the decomposition of the discharge product by offering more active sites and improved conductivity. The released silver nanoparticles after battery charging can be re-used in the following cycles. Experiments and theoretical calculation further indicate that the suspended silver nanoparticles can adsorb the soluble oxygen reduction intermediates, which are responsible for the alleviation of oxidative cleavage of electrolyte and corrosion of lithium anode. The lifespan of lithium oxygen batteries is therefore significantly extended from 55 to 390 cycles, and the rate performance and full-discharge capacity are also largely enhanced. The battery failure is attributed to the coalescence and growth of silver nanoparticles in the electrolyte, and further improvement on colloid stability is underway.


Publication metadata

Author(s): Luo Z, Li F, Hu C, Yin L, Li D, Ji C, Zhuge X, Zhang K, Luo K

Publication type: Article

Publication status: Published

Journal: Journal of Materials Science and Technology

Year: 2021

Volume: 73

Pages: 171-177

Print publication date: 20/05/2021

Online publication date: 28/09/2020

Acceptance date: 31/07/2020

ISSN (print): 1005-0302

Publisher: Chinese Society of Metals

URL: https://doi.org/10.1016/j.jmst.2020.07.039

DOI: 10.1016/j.jmst.2020.07.039


Altmetrics

Altmetrics provided by Altmetric


Actions

Find at Newcastle University icon    Link to this publication


Share