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Novel Insights into Enhanced Stability of Li-Rich Layered and High-Voltage Olivine Phosphate Cathodes for Advanced Batteries through Surface Modification and Electron Structure Design.
Adv Sci (Weinh)
December 2024
Institute of Materials Science, Technische Universität Darmstadt, Peter-Grünberg-Str. 2, D-64287, Darmstadt, Germany.
The design of cathode/electrolyte interfaces in high-energy density Li-ion batteries is critical to protect the surface against undesirable oxygen release from the cathodes when batteries are charged to high voltage. However, the involvement of the engineered interface in the cationic and anionic redox reactions associated with (de-)lithiation is often ignored, mostly due to the difficulty to separate these processes from chemical/catalytic reactions at the cathode/electrolyte interface. Here, a new electron energy band diagrams concept is developed that includes the examination of the electrochemical- and ionization- potentials evolution upon batteries cycling.
View Article and Find Full Text PDFAn efficient multi-gram access in a two-step synthesis to soluble, nine-atomic, silylated silicon clusters.
Nat Commun
December 2024
Department of Chemistry, TUM School of Natural Sciences, Technical University of Munich (TUM), Lichtenbergstraße 4, D-85748, Garching, Germany.
Silicon is by far the most important semiconducting material. However, solution-based synthetic approaches for unsaturated silicon-rich molecules require less efficient multi-step syntheses. We report on a straightforward access to soluble, polyhedral Si clusters from the binary phase KSi, which contains both [Si] and [Si] clusters.
View Article and Find Full Text PDFMagnetism and Thermoelectric Properties of the Zintl Semiconductor: EuZnAs.
Chem Mater
December 2024
Department of Chemistry, University of California, One Shields Ave, Davis, California 95616, United States.
Compositional diversity and intriguing structural features have made Zintl phases excellent candidates as thermoelectric materials. Zintl phase with 21-4-18 composition has shown high thermoelectric performance in the mid- to high-temperature ranges. The complex crystal structure and favorable transport properties of these compounds indicate the potential for high thermoelectric efficiency.
View Article and Find Full Text PDFEnhancing Sensitivity of Nuclear Magnetic Resonance in Biomolecules: Parahydrogen-Induced Hyperpolarization in Synthetic Disulfide-Rich Miniproteins.
J Am Chem Soc
December 2024
Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Peter-Grünberg-Straße 8, 64287 Darmstadt, Germany.
Hyperpolarization of small peptides by parahydrogen-induced polarization (PHIP) to increase the sensitivity of nuclear magnetic resonance (NMR) techniques is well established, while its application to larger biopolymers is still a mainly unexplored area. A particular challenge is the presence of folding-essential disulfide bridges. They tend to form metal complexes, thus hampering catalytic hydrogenation, a prerequisite for PHIP.
View Article and Find Full Text PDFTransforming carbon dioxide into a methanol surrogate using modular transition metal-free Zintl ions.
Nat Commun
November 2024
Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3QR, UK.
Although not the only greenhouse gas, CO is the poster child. Unsurprisingly, therefore, there is global interest across industrial and academic research in its removal and subsequent valorisation, including to methanol and its surrogates. Although difficult to study, the heterogenous pnictogens represent one important category of catalytic materials for these conversions; their high crustal abundance and low cost offers advantages in terms of sustainability.
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