Low temperature polymer electrolyte-based solid-state lithium batteries

Abstract

An ultrathin and high-strength solid polymer electrolyte (PPLD) is achieved by employing a polyethylene separator as the skeleton and incorporating a quasi-ionic-liquid for rapid lithium ion transport in poly(vinylidene fluoride-co-hexafluoropropene). No significant capacity decay is observed in the LiFePO₄/PPLD/Li battery even at −10 °C, indicating its promising potential for low-temperature solid-state lithium batteries.