Stabilizing the Li_1.4Al_0.4Ti_1.6(PO₄)₃/Li interface with an in situ constructed multifunctional interlayer for high energy density batteries

Abstract

Sodium super-ionic conductors (NASICON)-type solid-state electrolyte Li1.4Al0.4Ti1.6(PO4)3 (LATP) is an attractive alternative to liquid electrolyte for lithium batteries. The rapid development of LATP, however, is hindered by its poor interfacial...

Three-Dimensional Carbon Foam Modified with Mg3N2 for Ultralong Cyclability of a Dendrite-Free Li Metal Anode

“…However, the fitting peaks of both Mg metal (1303 eV) and Mg 2+ (1304.6 and 1303.8 eV) in Figure S15a were exhibited in the high-resolution XPS spectrum of Mg 1s. 43 Also, the peak intensity of Mg metal after the cycle was higher than that of fresh CF-Mg 3 N 2 (Figure 1j), indicating a partial conversion of Mg 3 N 2 to Mg metal. Moreover, Figure S15b,c shows that the content of Li 3 N in CF-Mg 3 N 2 was obviously higher than that of pure CF according to the fitting peaks of Li 1s, which was also associated with the reaction of Mg 3 N 2 and Li to form Mg metal and Li 3 N. 31 The presence of Li 3 N was more favorable to the generation of stable SEI, promoting the rapid transport of lithium ions, which was also an important reason for suppressing the top growth of Li metal on the CF-Mg 3 N 2 skeleton.…”

“…As shown in Figure S14, the XRD diffraction peaks were still attributed to the Mg 3 N 2 phases, indicating that lithiophilic sites still working after cycling. However, the fitting peaks of both Mg metal (1303 eV) and Mg 2+ (1304.6 and 1303.8 eV) in Figure S15a were exhibited in the high-resolution XPS spectrum of Mg 1s . Also, the peak intensity of Mg metal after the cycle was higher than that of fresh CF-Mg 3 N 2 (Figure j), indicating a partial conversion of Mg 3 N 2 to Mg metal.…”

Stabilizing a Li1.3Al0.3Ti1.7(PO4)3/Li metal anode interface in solid-state batteries with a LiF/Cu-rich multifunctional interlayer

“…The flexible organic layers provide good interfacial contact, but high temperature dependence, poor mechanical properties, and short cycle life limit their practical use. Regarding the organic–inorganic composite layer, the current work includes a BN film, 34 BaTiO 3 /P[VDF-TrFE-CTFE], 35 LiF/PVDF-HFP, 36 Mg 3 N 2 /PVDF, 37 Kevlar aramid nanofiber membrane, 38 etc. As a simple and low-cost modification strategy, the composite layer can combine the advantages of inorganic and organic layers to achieve a better balance in terms of effective Li/LATP isolation, low interfacial impedance and dendrite inhibition.…”