Aqueous Precursor Systems

Polymer assisted deposition of epitaxial oxide thin films

“…Especially encouraging are those that involve aqueous precursors (green chemistry methods). 44 However, to prevent the formation of precipitates through hydrolysis or condensation is still challenging in aqueous-CSD. Also, counter ions and ligands from the precursors must be properly selected to be easily removed during thermal treatment.…”

Ultrasonic Spray Deposition of Metal Oxide Films on High Aspect Ratio Microstructures for Three-Dimensional All-Solid-State Li-ion Batteries

“…The temperature at which precursor droplets hit the surface of the substrate (i.e., the deposition temperature) proved to be the most important parameter to obtain a complete coating of the microcylinder. Because of a lack of gel immobilization at low deposition temperatures (<150 °C), the precursor gel flows down the vertical structure, yielding largely uncoated microcylinders and thick films at the bottom. In the other extreme, when the deposition temperature was increased to 250 °C, the bottommost 5–6 μm of the 50 μm long microcylinders remained uncovered while clogging was observed higher up.…”

Solution-gel-based surface modification of LiNi0.5Mn1.5O4−δ with amorphous Li–Ti–O coating

“…32 Similarly, we hypothesize that the LNMO surface metal ions are coordinated by carboxylate groups and are cross-linked to other metal carboxylate complexes via ionic or hydrogen bridges formed by ammonium cations. The carboxylate groups form ionic bridges with other metal centers as well, 33 leading to a cross-linked gel structure as schematically shown in Fig. 7.…”