Please use this identifier to cite or link to this item: https://doi.org/10.1038/ncomms11203
Title: Balancing surface adsorption and diffusion of lithium-polysulfides on nonconductive oxides for lithium-sulfur battery design
Authors: Tao, X
Wan, J
Liu, C
Wang, H
Yao, H
Zheng, G 
Seh, Z.W
Cai, Q
Li, W
Zhou, G
Zu, C
Cui, Y
Keywords: carbon
cerium oxide
lanthanum oxide
lithium derivative
magnesium oxide
metal oxide
nanoparticle
polysulfide derivative
sulfide
sulfur derivative
unclassified drug
adsorption
diffusion
electrical property
electrode
expansion
experimental design
lithium
nanotechnology
oxide
sulfur compound
adsorption
Article
controlled study
density functional theory
diffusion
electric battery
electrochemical analysis
surface area
synthesis
Issue Date: 2016
Publisher: Nature Publishing Group
Citation: Tao, X, Wan, J, Liu, C, Wang, H, Yao, H, Zheng, G, Seh, Z.W, Cai, Q, Li, W, Zhou, G, Zu, C, Cui, Y (2016). Balancing surface adsorption and diffusion of lithium-polysulfides on nonconductive oxides for lithium-sulfur battery design. Nature Communications 7 : 11203. ScholarBank@NUS Repository. https://doi.org/10.1038/ncomms11203
Rights: Attribution 4.0 International
Abstract: Lithium-sulfur batteries have attracted attention due to their six-fold specific energy compared with conventional lithium-ion batteries. Dissolution of lithium polysulfides, volume expansion of sulfur and uncontrollable deposition of lithium sulfide are three of the main challenges for this technology. State-of-the-art sulfur cathodes based on metal-oxide nanostructures can suppress the shuttle-effect and enable controlled lithium sulfide deposition. However, a clear mechanistic understanding and corresponding selection criteria for the oxides are still lacking. Herein, various nonconductive metal-oxide nanoparticle-decorated carbon flakes are synthesized via a facile biotemplating method. The cathodes based on magnesium oxide, cerium oxide and lanthanum oxide show enhanced cycling performance. Adsorption experiments and theoretical calculations reveal that polysulfide capture by the oxides is via monolayered chemisorption. Moreover, we show that better surface diffusion leads to higher deposition efficiency of sulfide species on electrodes. Hence, oxide selection is proposed to balance optimization between sulfide-adsorption and diffusion on the oxides.
Source Title: Nature Communications
URI: https://scholarbank.nus.edu.sg/handle/10635/182486
ISSN: 2041-1723
DOI: 10.1038/ncomms11203
Rights: Attribution 4.0 International
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