Gentle Haulers of Lithium-Ion-Nanomolybdenum Carbide Fillers in Solid Polymer Electrolyte

Nanomolybdenum carbides with different morphologies and structures are inorganic fillers in solid polymer electrolytes. The matrices were polyvinylidene fluoride (PVDF) and polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP). Nanomolybdenum carbides (Mo2C) reduced the energy barrier of lithium-ion transfer. The nanofiller Mo2C with a hexagonal system built the carrier channel by charge intervention for good dynamic behavior. More effective carriers between the electrode and electrolyte interface were conducive to a uniform charge distribution and even deposition of lithium ion. The ionic conductivity of the polymer electrolyte was 7.27 x 10(-4) S cm(-1) at room temperature with an electrochemical stability window of 4.23 V and a lithium-ion transference number of 0.63. Solid-state batteries performed 500 cycles at a high current density of 2 C, with a capacity retention rate of 51.6%, including dendrite-free lithium anodes and stable SEI films.

Automated summary

Nanomolybdenum carbides were used as inorganic fillers in solid polymer electrolytes to reduce the energy barrier of lithium-ion transfer. The nanofillers improved the ionic conductivity of the electrolyte by building carrier channels and promoting uniform charge distribution and lithium-ion deposition.