Abstract
Cubic spinel LiMn2O4 (LMO) nanomaterial was synthesized by the solid-state method via double-step calcinations process, and AlPO4 (AlP) nano-layer is used to modify the spinel LiMn2O4 (LMO) electrode material, which was manufactured using a chemical deposition solution process. The cubic spinel crystal structure of LiMn2O4 wrapped by the AlPO4 layer was verified by structural analysis (XRD) and morphological analysis (FESEM and HRTEM). TEM result indicates that the AlPO4 nano-layer does not affect the bulk structure of pristine LiMn2O4 material. The electrochemical results demonstrated that the AlPO4-wrapped LiMn2O4 (AlP-LMO) cathode can still deliver its initial discharge capacity of 147.6 mAh g−1, whereas the pristine LiMn2O4 cathode has an initial discharge capacity of 116.4 mAh g−1 at 0.5 C rate. AlPO4 nano coating can effectively prevent the increase of the charge transfer resistance during charge–discharge process and improve the electrochemical performance of AlP-LMO electrode due to the protective nature of AlPO4 nano-layer.
Graphic Abstract
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Acknowledgements
We are thankful to the Sophisticated Instrument Centre (SIC) funded by the DST purse (phase-II) of Dr. Hari Singh Gour Vishwavidyalaya, Sagar, for providing numerous characterization resources (XRD, SEM, TEM and others). Shwetambar thanks the University Grant Commission of India for the senior Research Fellowship (grant no. 201819-NFO-2018-19-OBC-MAD-75121).
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Patel, S., Kumar, R., Patel, S. et al. Enhanced electrochemistry of AlPO4 nano-layer-wrapped LiMn2O4 cathode material for an aqueous rechargeable lithium-ion battery. Bull Mater Sci 46, 76 (2023). https://doi.org/10.1007/s12034-023-02908-4
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DOI: https://doi.org/10.1007/s12034-023-02908-4