Synthesis and Mg2+ deintercalation in manganese spinel nanocrystals
- Univ. of Illinois, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR)
- Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR)
- Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR); Univ. of Illinois, Chicago, IL (United States)
- Univ. of Illinois, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR); Pusan National Univ., Busan (Korea, Republic of)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Transition metal oxides are promising materials as cathodes for divalent batteries with high capacity under high voltage. A major challenge is the sluggish kinetics of intercalation of divalent cations into the oxide host. Tailoring of the size, composition and crystal structure of oxides is a necessary strategy to alleviate these barriers, which challenges our control of their synthesis. In this work, we selectively synthesize spinel-type MgxMn3-xO4 nanocrystals with different Mg/Mn ratios and investigate their ability to electrochemically shuttle Mg2+ ions. Crystal-chemical characterization of the reaction outcomes was conducted with X-ray diffraction, X-ray absorption spectroscopy, electron microscopy, and elemental analysis. Both 5 nm thick MgMn2O4 nanosheets and 10 nm Mg0.41Mn2.59O4 nanocubes underwent reversible Mg2+ deintercalation, yet no obvious reaction was observed in 60 nm Mg1.2Mn1.8O4 nanocubes. Our results suggest that both the size of the spinel nanocrystals and the Mg/Mn ratios play a role in the observed behaviour. The advances in the synthesis of spinel oxide nanocrystals achieved, and their correlation with Mg2+ deintercalation, pave the way toward the precise synthesis of multivalent cathode materials that fundamentally overcome barriers to practical application.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Research Foundation of Korea (NRF); National Science Foundation (NSF)
- Grant/Contract Number:
- AC02-06CH11357; NRF-2021R1C1C1005446; NRF-2018R1A5A1025594; DMR-0959470
- OSTI ID:
- 1961407
- Journal Information:
- Journal of Solid State Chemistry, Vol. 315; ISSN 0022-4596
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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