Solvent-free green synthesis of nonflammable and self-healing polymer film electrolytes for lithium metal batteries

Solubilized LiNO3by the cationic size effect of CsF for lithium metal anode protection and dendrite formation prevention in carbonate electrolyte

“…As the 'holy grail' of anodes, lithium metal with its ultralow redox potential and high theoretical capacity is suitable for high-energy density batteries. 1,2 However, some problems caused by the high reactivity of lithium and dendrites cannot be ignored. 3 For example, the production of massive dead lithium hinders the transport of lithium ions and electrons, and the formation of lithium dendrites can pierce the separator and lead to a short circuit, which causes safety problems, [4][5][6] especially in commercial ester-based electrolytes.…”

A self-healing polymerized-ionic-liquid-based polymer electrolyte enables a long lifespan and dendrite-free solid-state Li metal batteries at room temperature

“…In consideration of these excellent traits, the PIL electrolyte is highlighted as a strong competitor for use in high-energy-density solid-state LMBs. 25 1.9 at 25 1C 2 51C 65.5% 0.2C 76.3 mA h g À1 after 90 cycles PEO networks crosslinked by imine and disulfide bonds 27 6.97 at 25 1C 2 51C 88.4% 0.1C 128.5 mA h g À1 after 300 cycles EMITFSI-poly(C1-4TFSI)-PDDATFSI 34 10.6 at 25 1C 2 51C 97.7% 0.1C 147.1 mA h g À1 after 100 cycles TEOS in PAN 38 4.3 at 20 1C 2 51C 84.7% 0.5C 114.9 mA h g À1 after 400 cycles XVIm-TFSI-PEGDME 41 41.0 at 25 1C 2 51C 93.8% 0.2C 155.0 mA h g À1 after 150 cycles FB-SPE (PEGMA-HFBMA) 42 1. 45…”

“…Benefitting from the quick self-healing ability, the solid polymer electrolyte exhibits high compatibility with Li metal. 25 Guo and co-workers designed a polymer electrolyte by applying 2-(3-(6-methyl-4-oxo-1,4-dihydropyrimidin-2-yl)ureido) ethyl methacrylate (UPyMA) as the self-healing units, which certainly contributed to the establishment of compact Li/electrolyte interface, and therefore, aided in repairing interfacial flaws. 26 Through two PEO networks crosslinked by reversible disulfide and imine bonds, the Zhang group synthesized a self-healable solid polymer electrolyte.…”

Self-healable, super Li-ion conductive, and flexible quasi-solid electrolyte for long-term safe lithium sulfur batteries

“…3C compares σ , n Li + and τ sh of the healed PAES-g-(PU/2PEG90) and PAES-g-(PUS/2PEG90) membranes with those of other recently reported self-healing electrolytes. 83–96…”