Construction and Operating Mechanism of High-Rate Mo-Doped Na_3V_2(PO_4)_3@C Nanowires toward Practicable Wide-Temperature-Tolerance Na-Ion and Hybrid Li/Na-Ion Batteries

摘要

The growing demand for cost-efficiency and safe energy storage systems has stimulated enormous interest worldwide in advanced cathodes for practicle "beyond-Li-ion" batteries. Herein, a feasible electrospinning/annealing avenue for the construction of 1D Mo-doped Na3V2(PO4)(3) nanowires in situ coated with carbon nanoshell (MNVP@C NWs) toward next-generation Na-ion batteries (NIBs) and hybrid Li/Na-ion batteries (HLNIBs) as a high-rate cathode material, is reported. Particularly, the intrinsic hybrid Li/Na-ion storage mechanism of the MNVP@C NWs is unveiled for the HLNIBs with comprehensive characterizations. The resultant MNVP@C NWs demonstrate rapid electronic/ionic transport and rigid structural tolerance within operating temperatures from -25 to 55 degrees C, benefiting from its unique structural/compositional merits. More competitively, the MNVP@C NWs assembled pouch-type NIBs (-15 to 25 degrees C) and HLNIBs (-25 to 55 degrees C) both exhibit remarkable wide-temperature-tolerance electrochemical properties in terms of high-rate capabilities and long-duration cycling lifespan, along with material-level energy densities of approximate to 262.4 and approximate to 186.1 Wh kg(-1) at 25 degrees C, respectively. The contribution here is expected to exert a stimulative impact upon the future design of versatile cathodes for advanced high energy/power rechargeable batteries.