Electrochemical activity of Fe-MIL-100 as a positive electrode for Na-ion batteries

Journal Article · Fri Jan 01 00:00:00 EST 2016 · Journal of Materials Chemistry. A

DOI:https://doi.org/10.1039/C6TA03943J· OSTI ID:1391757

Sava Gallis, Dorina F.; Pratt III, Harry D.; Anderson, Travis M.; Chapman, Karena W.

Here we investigate the electrochemical activity of metal-organic frameworks (MOFs) as positive electrodes for Na-ion batteries in coin cell configurations. The performance of Fe-MIL-100 material is highly dependent on the choice of sodium salt source, and electrolyte system. The overall capacity fades over many cycles, however the high Coulombic efficiency is maintained. This can be correlated with inaccessibility of active sites for Na intercalation, due to the increase of extra carbonaceous material inside the pores. High resolution synchrotron powder X-ray and pair distribution function analyses of the as-made and cycled electrodes reveal the structure maintains the long-range order with progressive cycling. This finding suggests that careful consideration of all variables in battery components, and especially electrolyte selection can lead to greatly improved performances.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1391757
• Journal Information: Journal of Materials Chemistry. A, Vol. 4, Issue 36; ISSN 2050-7488
• Publisher: Royal Society of Chemistry
• Country of Publication: United States
• Language: English