Tailoring polymer electrolyte ionic conductivity for production of low- temperature operating quasi-all-solid-state lithium metal batteries

Abstract The stable operation of lithium-based batteries at low temperatures is critical for applications in cold climates. However, low-temperature operations are plagued by insufficient dynamics in the bulk of the electrolyte and at electrode|electrolyte interfaces. Here, we report a quasi-solid-state polymer electrolyte with an ionic conductivity of 2.2 × 10 −4 S cm −1 at −20 °C. The electrolyte is prepared via in situ polymerization using a 1,3,5-trioxane-based precursor. The polymer-based electrolyte enables a dual-layered solid electrolyte interphase formation on the Li metal electrode and stabilizes the LiNi 0.8 Co 0.1 Mn 0.1 O 2 -based positive electrode, thus improving interfacial charge-transfer at…

• NN
  National Natural Science Foundation of China

  Awards: 22005334, 51961145302
• CP
  China Postdoctoral Science Foundation

  Award: 2020M682403
• HU
  Huazhong University of Science and Technology
• IS
  Israel Science Foundation

  Award: 51961145302
• MI
  Major International Joint Research Programme

  Award: 51961145302
• NK
  National Key Research and Development Program of China