Electrochemical investigations on organometallic compounds containing group 14 elements

In this work mainly the influence of octaphenyl-cyclotetrasilane (Si4Ph8) and decaphenyl-cyclopentasilane (Si5Ph10) on the capacity of graphite in lithium-ion half-cells has been tested. For this purpose, the silanes were pretreated differently depending on the preparation procedure of the electrodes used. Pretreatments included pyrolysis of the silanes, mixing and/or ball-milling of the same with graphite, polymeric binder, carbon and solvent. Also, first experiments on the influence of aryl-substituted stannanes such as mesityltin trihydride (MesSnH3) or naphthyltin trihydride (NaphSnH3, with and without in situ polymerization by the amine base tetramethylethylenediamine (TMEDA)) and perphenylated germanium rings (octaphenyl-cyclotetragermane Ge4Ph8, decaphenyl-cyclopentagermane Ge5Ph10) on the capacity of graphite were performed. Furthermore, synthesis of dichloro-(1-naphthyl)(phenyl)silane as a precursor material to cyclic polysilanes was conducted.
Schlagwörter novel anode materials for Li-ion batteries; polystannanes; cyclopolysilanes; cyclopolygermanes