title: The microstructure matters: breaking down the barriers with single crystalline silicon as negative electrode in Li-ion batteries.
abstract: Silicon-based microelectronics forms a major foundation of our modern society. Small lithium-ion batteries act as the key enablers of its success and have revolutionised portable electronics used in our all everyday's life. While large-scale LIBs are expected to help establish electric vehicles, on the other end of device size chip-integrated Si-based μ-batteries may revolutionise microelectronics once more. In general, Si is regarded as one of the white hopes since it offers energy densities being ten times higher than conventional anode materials. The use of monocrystalline, wafer-grade Si, however, requires several hurdles to be overcome since it its volume largely expands during lithiation. Here, we will show how 3D patterned Si wafers, prepared by the sophisticated techniques from semiconductor industry, are to be electrochemically activated to overcome these limitations and to leverage their full potential being reflected in stable charge capacities (>1000 mAhg(-1)) and high Coulomb efficiencies (98.8%).
authors.affiliation: Christian Doppler Laboratory for Lithium Batteries, Institute for Chemistry and Technology of Materials, Graz University of Technology (NAWI Graz), Stremayrgasse 9, 8010 Graz, Austria.
authors.forename: M
authors.initials: M
authors.lastname: Sternad
authors.affiliation: Infineon Technologies Austria AG, 9500 Villach, Austria.
authors.forename: M
authors.initials: M
authors.lastname: Forster
authors.affiliation: Christian Doppler Laboratory for Lithium Batteries, Institute for Chemistry and Technology of Materials, Graz University of Technology (NAWI Graz), Stremayrgasse 9, 8010 Graz, Austria.|ALISTORE-ERI European Research Institute, 33 rue Saint Leu, 80039 Amiens, France.
authors.forename: M
authors.initials: M
authors.lastname: Wilkening