• Elucidating the Al$^{3+}$ ion electrochemical behaviour of LiFePO$_4$

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    • Keywords


      Lithium iron phosphate; aqueous electrolyte; intercalation; batteries.

    • Abstract


      This report illustrates an investigation on the electrochemical behaviour of LiFePO$_4$ in Al$^{3+}$ ion conducting aqueous electrolyte for the first time. It is inferred from the electrochemical measurements that Al$^{3+}$ ion together with the structural Li$^+$ ion could take part in the reversible oxidation–reduction process of LiFePO$_4$. This is also supported by the ex-situ X-ray diffraction and X-ray photoelectron spectroscopy investigations. It is also found that leaching of iron species from LiFePO$_4$ in the electrolyte results in low cycling stability. This could be mitigated to an appreciable degree by tweaking the electrolyte composition with a low fraction of iron species in the electrolyte.

    • Author Affiliations



      1. Department of Physics, Tezpur University, Tezpur, Assam 784028, India
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