Vlad, AlexandruRupp, RicoRicoRupp2025-05-142025-05-142025-05-142016https://hdl.handle.net/2078.2/1675High effort is currently being put into the capacity increase of lithium-ion batteries. Silicon is of special interest, since it offers, apart from dendrite forming pure lithium, the highest known specific capacity for the storage of lithium. In addition to its unlimited availability, non-toxic nature and high safety, this makes silicon a promising material for next-generation anodes. However, challenges are encountered during repeated (de-)lithiation of silicon, due to a large volume change of more than 300% during lithiation, including pulverization of the anode and accompanied capacity loss. Furthermore, the volume increase promotes excessive decomposition of the electrolyte, which leads to the formation of a thick solid-electrolyte interface. Many designs to overcome the problems of Si-based anodes are in the scope of research. Here, a new approach is proposed, which faces all mentioned problems and which is based on a well scalable electrodeposition technique. This technique is the electrochemical co-deposition of active material in form of nanoparticles in an inactive metallic matrix. Active material at the nanoscale has previously been shown to withstand high stresses during cycling without fracturing. The metallic matrix is assumed to be able to accommodate the volume change of the nanoparticles and shield them from the electrolyte, preventing a thick solid-electrolyte interphase. This work aims for a first feasibility study and proof of concept. Sediment co-deposition of Cu-Si systems from aqueous electrolytes shows the possible incorporation of a small amount of silicon in copper and possible methods for the increase of incorporated Si content are suggested for further research. The cycling of co-deposited silica (24%) in a Ni matrix proofs the possible use of nickel as a matrix material, since Li-ion diffusion and general lithiation of the nanoparticles are allowed. However, the silica-based system indicates the necessity of further adaptation of the particles and/or the matrix, since only part of the active material is lithiated, presumably as a result of mechanical constraints. The sediment co-deposition of tin particles with nickel, showing favorable properties of the electrically conductive Sn, indicates further the requirement of electrolyte agitation for this technique.Lithium-ion batteriessiliconnanoparticleselectrochemistrytext::thesis::master thesisthesis:4585