Co-contribution of quenching and nanocrystallization on ionic-conductivity improvement of a composite electrolyte of polyethylene Oxide/Li7La3Zr2O12 nanofibers at 45 °C for all-solid-state Li metal batteries

A Multiscale Hollow Spherical LATP Active Filler Improves Conductivity and Mechanical Strength in Composite Solid Electrolytes for Li Batteries

“…Fillers decrease the degree of crystallinity in the polymer matrix, and it was found that hollow spherical SLATP caused a greater reduction compared to control SyLATP. The two characteristic XRD peaks of PEO at 18.9° and 23.2° in P6L indicated the high crystallinity of PEO at room temperature. , These weakened and broadened in P6SyL and P6SL (Figure S4). FTIR analysis (Figure e) also provided evidence that the LATP fillers reduced PEO crystallinity and that hollow spherical SLATP did this to a greater extent.…”

“…The two characteristic XRD peaks of PEO at 18.9°and 23.2°in P6L indicated the high crystallinity of PEO at room temperature. 26,27 These weakened and broadened in P6SyL and P6SL (Figure S4). FTIR analysis (Figure 2e) also provided evidence that the LATP fillers reduced PEO crystallinity and that hollow spherical SLATP did this to a greater extent.…”

Bridging Li7La3Zr2O12 Nanofibers with Poly(ethylene oxide) by Coordination Bonds to Enhance the Cycling Stability of All-Solid-State Lithium Metal Batteries

“…The specific preparation method of LLZO NFs is according to our previous work. 24 The procedure for preparing LLZO NF−DI−Ca 2+ was as follows. The LLZO NFs (200 mg) and DI (3 mL) were mixed in acetonitrile (30 mL) with the resulting solution and then heated at 80 °C for 1 h. The dried LLZO NF−DI was then washed twice using acetonitrile via centrifugation before being dried under vacuum at 100 °C for 24 h. The dried LLZO NF−DI was then added to an appropriate amount of acetonitrile solution, to which a solution mixture of saturated calcium chloride in methanol (3 mL) was slowly added.…”

“…Based on fairly uniform formation of CPEs, Liu et al23 carried out a DFT calculation and proved that the chemical bond interactions between LLZTO and ethylene carbonate further benefit Li + conductivity remarkably. Inspired by their scientific findings, we believe that an effective way to further improve Li + conductivity of CPEs is to build "Li + bridge" between the polymers and ceramics as much as possible in a fairly uniform CPE.Inspired by the plant Boston ivy, which is capable of anchoring firmly to garden walls, chemical suckers made of N-(3-triethoxysilylpropyl)4,5-dihydroimidazole (DI) and Ca 2+ are grafted onto the Li 7 La 3 Zr 2 O 12 NF (LLZO NF)24 surface (Figure1a), benefitting a strong interaction with the PEO scaffold. DI is a typical silane coupling agent.…”

Boosting the Ion Mobility in Solid Polymer Electrolytes Using Hollow Polymer Nanospheres as an Additive

“…Also, the cross-linking agent and initiator may be retained in the solid polymer electrolyte, causing several parasitic reactions. Inorganic nanoparticles (Al 2 O 3 , SiO 2 , carbon quantum dots, and TiO 2 ) are believed to increase the mobility of polymer segments and enhance ion transport. − One-dimensional nanowires (BaTiO 3 , cellulose, halloysite), two-dimensional nanosheets (vermiculite clay, C 3 N 4 , MOF, GO, and so on) and three-dimensional nanometer framework materials (Al 2 O 3 , SiO 2 , LLZO) have been investigated as fillers to build the ion transport network structure in polymer electrolytes. − These nanofillers not only enhance the cations’ transport but also help to suppress the anion motion, leading to a prolonged cycle life of the batteries. − However, the mechanical properties of polymer electrolytes decrease with the addition of the nanofillers, and the nanoparticles may separate from the electrolyte during cycling. The nanofiller’s ability to enhance the polymer electrolyte, to a great extent, depends on its homogeneous distribution and the morphology of the particles. ,, A regular morphology and larger contact area of the fillers enhance the activity of polymer chain segments and provide abundant fast ion transport passageways. − Well-dispersed nanomaterials, particularly zero-dimensional ones, are found to increase the dissociation degree of lithium salts, adsorption of anions, and segment movement of the PEO system. ,− Some recent works showed that fast ion transport could be achieved in polymer electrolytes via blending the nanofillers during polymerization. ,,, Nevertheless, abundant fillers are required to improve the ionic conductivity of the composite solid polymer electrolyte, resulting in a sacrifice of mechanical properties.…”