2020
DOI: 10.1021/acs.chemmater.0c01988
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High Voltage Mg-Ion Battery Cathode via a Solid Solution Cr–Mn Spinel Oxide

Abstract: Lattice Mg2+ in a tailored solid solution spinel, MgCrMnO4, is electrochemically utilized at high Mn-redox potentials in a nonaqueous electrolyte. Complementary evidence from experimental and theoretical analyses supports bulk Mg2+ (de)­intercalation throughout the designed oxide frame where strong electrostatic interaction between Mg2+ and O2– exists. Mg/Mn antisite inversion in the spinel is lowered to ∼10% via postannealing at 350 °C to further improve Mg2+ mobility. Spinel lattice is preserved upon removal… Show more

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Cited by 56 publications
(97 citation statements)
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“…[38][39][40] Our presented material showing a high-potential (2-3 V), long-term cyclability (exceeding 100 cycles), and acceptable capacity (≈100 mAh g −1 ) would be one of the best candidates among the oxide cathode materials for MRBs, which has been substantiated with clear evidence of reversible structure change accompanied by Mg insertion and extraction. Although several recent papers report the progress on spinel cathode materials, [41][42][43] exceeding the energy density of LIBs (cf. ≈370 Wh kg −1 for a conventional LiCoO 2 /C cell) is still a challenging issue in the field of MRBs.…”
mentioning
confidence: 99%
“…[38][39][40] Our presented material showing a high-potential (2-3 V), long-term cyclability (exceeding 100 cycles), and acceptable capacity (≈100 mAh g −1 ) would be one of the best candidates among the oxide cathode materials for MRBs, which has been substantiated with clear evidence of reversible structure change accompanied by Mg insertion and extraction. Although several recent papers report the progress on spinel cathode materials, [41][42][43] exceeding the energy density of LIBs (cf. ≈370 Wh kg −1 for a conventional LiCoO 2 /C cell) is still a challenging issue in the field of MRBs.…”
mentioning
confidence: 99%
“…
electric vehicles, and more. [4,5] Among these rechargeable battery technologies, sodium, [6][7][8] magnesium, [9,10] zinc, [11,12] calcium, [13] and aluminum [14][15][16] ion batteries have drawn unique attention as the candidates of next-generation batteries. In particular, rechargeable aluminum-ion batteries (AIBs) hold impressive advantages, such as wide temperature range, high safety, and low cost.
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mentioning
confidence: 99%
“…Furthermore, real feasibility tests must include viable electrolyte solutions components and examination of their compatibility and their impact on the electrochemical response of the tested cathodes. In this respect, working with MgTPFA 2 based electrolyte solutions may be a good starting point as these solutions support reversible Mg deposition [18,42] …”
Section: Introductionmentioning
confidence: 99%