Journal
ELECTROCHIMICA ACTA
Volume 196, Issue -, Pages 118-124Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.02.155
Keywords
Terephthalate salts; Metal-organic frameworks; Organic electrodes; Lithium ion batteries; Anodes
Categories
Funding
- University of Electronic Science and Technology of China [Y02002010301080]
- National Science Foundation of China [11234013, 21473022, 51502032]
- Science and Technology Bureau of Sichuan Province of China [2015HH0033]
- Fundamental Research Funds for the Central Universities, China [ZYGX2012Z003, ZYGX2015J027]
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Carboxylate-based metal organic frameworks are popular lithium storage electrode materials by using carbonyl groups as redox centers. In this study, alkaline earth metal terephthalates MC8H4O4 (M= Ca, Sr, Ba) are prepared and applied as anodes for lithium ion batteries. The structure differences in terms of crystallography and molecular structures and electrochemical differences resulting from alkaline earth metal ionic radii are explored. It is found that electrostatic interactions between the alkaline metal cations and the terephthalate anions are important to the crystal structure, although these three organic matters consist of alternating layers of terephthalate anions and polyhedrally coordinated metal cations, but do not form iso-structure. Moreover, terephthalate salt with smaller cationic radius is featured with ionic bond behavior, lower discharge potential vs. Li/Li+ and higher discharge capacity with good capacity retention behavior. (C) 2016 Elsevier Ltd. All rights reserved.
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