The starting material used in this study was the vanadium-tellurite-phosphate glass, which was applied as the anode material for LIBs in a previous report . The glass with the nominal molar composition of 20TeO2-60V2O5-20P2O5 (TVP) was prepared via the melt quenching method from the reagent grade TeO2, V2O5 and NH4H2PO4 powders following the procedure described elsewhere . The humidity experiment was carried out by keeping the 'dry' TVP glass powders (i.e., the asreceived glass powders that was not hydrated.) in an environmental chamber (HWS-508). To investigate exclusively the effect of relative humidity (RH) on the performance of TVP glasses, the glass powders were treated under three different RH conditions, i.e., 45, 65 and 85 RH%, for 120 h at 333 K, respectively (Fig. ). After the treatment, the samples were taken out from the chamber immediately. The corresponding samples were named as 45RH, 65RH and 85RH, respectively.