title: Investigating the Mg-Si Binary System via Combinatorial Sputter Deposition As High Energy Density Anodes for Lithium-Ion Batteries.
abstract: Mg-Si thin films with various elemental compositions ranging from 0≤x≤1 in MgxSi(1-x) were obtained via combinatorial magnetron sputter deposition of Si and Mg in order to improve the electrochemical lithiation/delithiation process of pure Si by embedding Si in an active Mg-Si matrix. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and Raman spectroscopy methods were used to investigate the morphology, stoichiometry, and structure of the different thin film samples. Constant current charge/discharge cycling revealed significant electrochemical changes depending on the Mg content in comparison to the pure Si active material improving the capacity retention to 96% over 400 cycles.
authors: University of Muenster , MEET Battery Research Center, Institute of Physical Chemistry, Corrensstrasse 46, 48149 Muenster, Germany.
authors: Guido
authors: G
authors: Schmuelling
authors: University of Muenster , MEET Battery Research Center, Institute of Physical Chemistry, Corrensstrasse 46, 48149 Muenster, Germany.
authors: Martin
authors: M
authors: Winter
authors: University of Muenster , MEET Battery Research Center, Institute of Physical Chemistry, Corrensstrasse 46, 48149 Muenster, Germany.
authors: Tobias
authors: T
authors: Placke
keywords: active matrix; combinatorial magnetron sputter deposition; lithium-ion battery; magnesium; silicon