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Abstract |
Inthis work, a novel Na substituted Li3-xNaxPS4 mixed-ions solid electrolyte isprepared by ball milling process. Various physio-chemical characterizationtechniques such as high-power X-ray diffraction, laser Raman spectroscopy,field emission scanning electron microscopy, and X-ray photoelectronspectroscopy are adopted to analyse structural characteristics, surfacemorphology, particle size, and chemical composition of the prepared materials.Electrochemical impedance spectroscopy technique is used to calculate the ionicconductivity of the prepared solid electrolytes. The prepared Li2.8Na0.2PS4solid electrolyte is exhibited high ionic conductivity of 3.6 × 10?4 S cm?1 atroom temperature. In addition, Li2.8Na0.2PS4 solid electrolyte shows excellentstability against lithium metal. The fabricated, In/Li2.8Na0.2PS4/NCM/In 2032 typecoin cell shows a specific capacity of 99.1 mAh g?1 at current density of 0.1C betweenthe potential of 2.38 V and 3.68 V with ~65% specific capacitance retentionafter 25 cycles. This study proves that Na substitution provides high ionicconductivity and good electrochemical performance to obtain promisingelectrolyte material for future all solid-state battery applications.
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