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Mechanistic studies of transition metal-terephthalate coordination complexes upon electrochemical lithiation and delithiation
Cited 58 time in
Web of Science
Cited 60 time in Scopus
- Authors
- Issue Date
- 2015-08
- Publisher
- John Wiley & Sons Ltd.
- Citation
- Advanced Functional Materials, Vol.25 No.30, pp.4859-4866
- Abstract
- Redox-active organic molecules are intriguing candidates as active electrode materials for next-generation rechargeable batteries due to their structural diversity, environmental friendliness, and solution-phase preparation processes. Recently, a transition metal-organic coordination approach is exploited to construct high capacity anodes for lithium-ion rechargeable batteries. Here, a family of transition metal-organic coordination complexes with terephthalate ligands is synthesized that exhibit reversible capacities above 1100 mA h g(-1). The reaction mechanism to describe the multi-electron redox processes is investigated at the molecular-level via the synchrotron-sourced X-ray absorption spectroscopy and solid-state NMR analyses. The spectroscopic studies reveal that the electrochemical process involves oxidation state changes of the transition metals followed by additional lithium insertion/extraction in the conjugated aromatic ligands. The combined approaches assisted by synthetic organic chemistry and solid-state analysis provide mechanistic insights into excessive lithiation processes that have implications for the design of high-performance anode materials.
- ISSN
- 1616-301X
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