Mixed Polyanion Na‐Mn‐V‐P Glass–Ceramic Cathode Network: Improved Electrochemical Performance and Stability

Abstract

This investigation demonstrates the electrochemical performance of glass and glass–ceramic NaMn 1− x (VO) x PO 4 ( x = 0.1, 0.3, 05, 0.7 mol%, and labeled as NM 1− x V x P) cathode material system via phase details, structural illustration, electronic conductivity, and reversible capacity, etc. Pro‐crystal calculation analysis is used to monitor Na + ion pathways’ migration for as‐precipitated NaMnPO 4 , Na 2 MnP 2 O 7 , and NaVO 3 phases. The highest conductivity is achieved (≈5.92 × 10 −7 S cm −1 ) for the glass–ceramic sample having x = 0.3 mol% (NM 0.7 V 0.3 P) due to the lowest charge transfer resistance ( R ct ). Electrochemical measurements of the best conducting sample using coin half‐cell exhibit two distinct voltage plateaus at 2 and 2.9 V versus Na/Na + , facilitating the active centers in two directions. The cyclability test of best‐conducting NM 0.7 V 0.3 P glass–ceramic network exhibits adequate reversible capacity up to 97% of the specific capacity even up to 50 cycles, which satisfies its superior stability for longer durations.