Preparation and performance evaluation of organophilic nano-montmorillonite conducting polymer electrolyte for all-solid-state lithium ion batteries

Nano-montmorillonite (nano-MMT) plastic polymer electrolyte membrane was prepared by solution casting method. Organophilic modification of nano-MMT (OMMT) was used as the channels for Li ⁺ transferring. By electrochemical impedance spectroscopy measure, the higher ion conductivity of membrane consisting of PVC/PVDF/LiTFSI/nano-OMMT electrolyte was 1.67 × 10 ⁻⁴  S cm ⁻¹ and the transference number was 0.67. SEM was used to determine the morphology of the cross-section of electrolyte. The FT-IR spectroscopy investigation was subjected to explain the reason of the benificial nano-OMMT channel of Li ions. The Li⋯O–Si interactions of Li ions and nanoparticle of OMMT provided guiding transmission for Li ions, which promoted the Li ⁺ transferring fluency in plastic polymer electrolyte. Therefore, the PVC/PVDF/LiTFSI/nano-OMMT electrolyte had good stability and reversibility in solid-state battery. The solid-state battery showed more stable interfacial compability during charge–discharge process.