Synthesis, Characterization, and Electrochemistry of Layered Chalcogenides LiCu Ch ( Ch = Se, Te).
Martin ValldorDaria MikhailovaLars GiebelerKwing To LaiLena SpilleckeHans-Joachim GrafeBernd BüchnerPublished in: Inorganic chemistry (2018)
Two novel compounds, LiCu Ch ( Ch = Se or Te), were synthesized by direct reaction between elements in closed ampules inside corundum crucibles. Both compounds are highly air-sensitive and possess an anti-PbClF crystal structure, which contains Cu Ch layer analogues to the Fe[As/Se] layers in Fe-based superconductors. In electrochemical battery cells, Li can be almost completely extracted from LiCuSe, but the reverse reaction is only partly successful and Li2Se and Cu2- xSe are formed instead. LiCuSe exhibits a temperature independent and slightly positive magnetic susceptibility. From 7Li NMR measurements, the activation energy of the Li ion diffusion process is about 0.5 eV but is slightly lower for LiCuTe as compared to LiCuSe. Also, the small and almost temperature independent NMR shifts of the 7Li nucleus indicate the absence of Pauli paramagnetism in these compounds, consistent with a 3 d10 full valence state of the Cu ions.
Keyphrases
- solid state
- ion batteries
- room temperature
- aqueous solution
- crystal structure
- metal organic framework
- magnetic resonance
- high resolution
- induced apoptosis
- gold nanoparticles
- molecularly imprinted
- cell cycle arrest
- molecular docking
- cell proliferation
- signaling pathway
- highly efficient
- electron transfer
- oxide nanoparticles
- transition metal