Three-dimensional LLZO/PVDF-HFP fiber network-enhanced ultrathin composite solid electrolyte membrane for dendrite-free solid-state lithium metal batteries

Uniform Lithium Plating for Dendrite-Free Lithium Metal Batteries: Role of Dipolar Channels in Poly(vinylidene fluoride) and PbZrxTi1–xO3 Interface

“…After incorporation into the PVDF SPE, the PZT-rich layer shows an increased conductivity of 1.48 × 10 –5 S cm –1 at 25 °C (Figure S12). Although this conductivity is still relatively low, it is worth noting that the PZT-rich layer is quite thin; hence, the PVDF–PZT CPE shows a high ionic conductivity of 1.16 × 10 –4 S cm –1 (Figure a and S11a), which is higher than that of the PVDF SPE (2.79 × 10 –5 S cm –1 , Figure a and S11b) and the reported PVDF and poly(ethylene oxide) (PEO) SPEs without any inorganic fillers (10 –7 –10 –5 S cm –1 ). , Note that the ionic conductivities presented in Figure a refer to the “through-plane” conductivities. Due to the different dispersion states of PZT in the “through-plane” and “in-plane” directions (Figure h), the “in-plane” conductivity of the PVDF–PZT CPE was also measured, yielding a value of approximately 7.04 × 10 –5 S cm –1 (Figure S13).…”

PEO/PVDF–HFP/LLZTO Composite Solid Polymer Electrolyte for High-Performance All-Solid-State Lithium Metal Batteries

“…One is the filler of LLZTO particles, which can promote the dissociation of LiTFSI. Another is the acid–base interaction between LiTFSI and the PVDF–HFP polymer matrix, which contributes to the dissociation and conduction of lithium ions. − …”

Electrospinning techniques for inorganic–organic composite electrolytes of all-solid-state lithium metal batteries: a brief review

“…Furthermore, the Li‖Li symmetric cell demonstrated high cycling stability at a current density of 0.1 mA cm −2 within 1000 h. In situ electrospinning can reduce the interface impedance between the electrode and the solid electrolyte to solve the problem of poor stability when the CSE is matched with the high voltage positive electrode. For example, He et al 62 prepared a 3D LLZO/PVDF–HFP fiber network directly on a cathode surface via electrospinning and then poured PEO/LiTFSI into the 3D fiber network to obtain an ultrathin (13 μm) inorganic–organic CSE in close contact with the cathode. The assembled NCM811‖Li full batteries had a first discharge capacity of 134.7 mA h g −1 and a capacity retention of 82.8% after 100 cycles at 0.5C and 40 °C.…”