Strategies to explore and develop reversible redox reactions of Li-S in electrode architectures using silver-polyoxometalate clusters

Ye, J. C., Chen, J. J., Yuan, R. M., Deng, D. R., Zheng, M. S., Cronin, L. and Dong, Q. F. (2018) Strategies to explore and develop reversible redox reactions of Li-S in electrode architectures using silver-polyoxometalate clusters. Journal of the American Chemical Society, 140(8), pp. 3134-3138. (doi:10.1021/jacs.8b00411) (PMID:29425034)

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Abstract

Investigations of the Ag (I)-substituted Keggin K3[H3AgI PW11O39] as a bifunctional Lewis acidic and basic catalyst are reported that explore the stabilization of Li2Sn moieties so that reversible redox reactions in S-based electrodes would be possible. Spectroscopic investigations showed that the Li2Sn-moieties can be strongly adsorbed on the {AgI PW11O39} cluster, where the Ag(I) ion can act as a Lewis acid site to further enhance the adsorption of the S-moieties, and these interactions were investigated and rationalized using DFT. These results were used to construct an electrode for use in a Li−S battery with a very high S utilization of 94%, and a coulometric capacity of 1580 mAh g−1 . This means, as a result of using the AgPOM, both a high active S content, as well as a high areal S mass loading, is achieved in the composite electrode giving a highly stable battery with cycling performance at high rates (1050 and 810 mAh g−1 at 1C and 2C over 100 to 300 cycles, respectively).

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Chen, Dr Jiajia and Cronin, Professor Lee
Authors: Ye, J. C., Chen, J. J., Yuan, R. M., Deng, D. R., Zheng, M. S., Cronin, L., and Dong, Q. F.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Journal of the American Chemical Society
Publisher:American Chemical Society
ISSN:0002-7863
ISSN (Online):1520-5126
Published Online:09 February 2018

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
577391Programmable Molecular Metal Oxides (PMMOs) - From Fundamentals to ApplicationLeroy CroninEngineering and Physical Sciences Research Council (EPSRC)EP/J015156/1CHEM - CHEMISTRY
605821The Multi-Corder: Poly-Sensor TechnologyDavid CummingEngineering and Physical Sciences Research Council (EPSRC)EP/K021966/1ENG - ENGINEERING ELECTRONICS & NANO ENG
616021Energy and the Physical Sciences: Hydrogen Production using a Proton Electron BufferLeroy CroninEngineering and Physical Sciences Research Council (EPSRC)EP/K023004/1CHEM - CHEMISTRY
685741SMARTPOM: Artificial-Intelligence Driven Discovery and Synthesis of Polyoxometalate ClustersLeroy CroninEuropean Research Council (ERC)670467CHEM - CHEMISTRY