A5048733137- Inorganic Chemistry and Materials
- MXene and MAX Phase Materials
- Inorganic Fluorides and Related Compounds
- Advanced Battery Materials and Technologies
- Advanced Condensed Matter Physics
- Aluminum Alloys Composites Properties
- 2D Materials and Applications
- Metal and Thin Film Mechanics
- Ferroelectric and Negative Capacitance Devices
Technical University of Darmstadt
2020-2023
Abstract Fluoride ion batteries (FIBs) are a recent alternative all-solid-state battery technology. However, the FIB systems proposed so far suffer from poor cycling performance. In this work, we report La 2 NiO 4.13 with Ruddlesden-Popper type structure as an intercalation-based active cathode material in all solid-state excellent The critical charging conditions to maintain conductivity of cell were determined, which seems be major obstacle towards improving stability FIBs. For optimized...
Within this study, we show that a broad range of reduced phases La2NiO3F2−Δ can be derived from Ruddlesden–Popper-type La2NiO3F2 using reductive topochemical defluorination method based on reactions between the oxyfluoride and sodium hydride. The selective extraction fluoride results in strong structural changes, nuclear magnetic structures obtained have been determined. Due to high anion content La2NiO3F2, formation Ni+-containing compounds has observed under reduction. For first time, led...
Two-dimensional carbides/nitrides, typically called MXenes, are an emerging member of the ever-growing family two-dimensional materials. The prediction a ferromagnetic groundstate in chromium-containing MXenes has triggered growing interest their chemical exfoliation from Cr-based MAX phases. However, poses serious difficulties using standard etching agents such as hydrofluoric acid (HF). Here, we investigate exfoliability Cr2GaC particles by with aqueous HF both experimentally and...
We systematically perform density-functional theory (DFT) calculations for all possible ${\mathrm{M}}_{n+1}{\mathrm{AX}}_{n}$ (MAX) phases with transition metal M=Sc to Au (excluding Tc), A in group IIIA-IVA, X=C, N, and $n=1,2,3$, a total of about 1200 systems. The thermodynamic stability is determined by comparing the formation enthalpy (at 0 K) against combinations unary, binary, ternary boundary (available from online DFT databases). Thereby, we identify 124 so far unknown (in terms both...