The extremely low room-temperature ionic conductivity of solid-state polymer electrolytes (SPEs) ranging from 10-7 to 10-5 S cm-1 seriously restricts their practical application in solid-state lithium metal batteries (LMBs). Herein,...

Severe interfacial side reactions of polymer electrolyte with LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode and Li metal anode restrict the cycling performance of solid-state NCM811/ Li batteries.H erein, we propose ac hemically stable ceramicpolymer-anchored solvent composite electrolyte with high ionic conductivity of 6.0 10 À4 Scm À1 ,w hiche nables the solid-state NCM811/Li batteries to cycle 1500 times.T he Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 nanowires (LNs) can tightly anchor the essential N, N-dimethylformamide (DMF) in poly(vinylidene fluoride) (PVDF), greatly enhancing its electrochemical stability and suppressing the side reactions.W ei dentify the ceramic-polymer-liquid multiple ion transport mechanism of the LNs-PVDF-DMF composite electrolyte by tracking the 6 Li and 7 Li substitution behavior via solid-state NMR. The stable interface chemistry and efficient ion transport of LNs-PVDF-DMF contribute to superior performances of the solid-state batteries at wide temperature range of À20-60 8 8C.

No abstract

Constructing stable surface modification layer is an effective strategy to suppress dendrite growth and side reactions of Zinc (Zn) metal anode in aqueous Znion battery. Herein, a multicomponent CuÀ Zn alloy interlayer with superior Zn affinity, high toughness and effective inhibition effect on lattice distortion is constructed on Zn foil (CuÀ Zn@Zn) to fabricate ultrastable Zn metal anode. Owning to the advantages of high binding energy of CuÀ Zn alloy layer with Zn atoms and less contact area between metallic Zn and electrolyte, the as-prepared CuÀ Zn@Zn electrode not only restricts the aggregation of Zn atoms, but also suppresses the pernicious hydrogen evolution and corrosion, leading to homogeneous Zn deposition and outstanding electrochemical performances. Accordingly, the symmetric battery with CuÀ Zn@Zn electrode exhibits an ultra-long cycle life of 5496 h at 1 mA cm À 2 for 1 mAh cm À 2 , and the CuÀ Zn@Zn//V 2 O 5 pouch cell demonstrates excellent cycling stability with a capacity retention of 88 % after 600 cycles.