Thin Film Silicon-Based Intermetallic Systems for Lithium Ion Battery Application
One approach to address this issue is the use of a stabilizing matrix, in which silicon is embedded. Therefore, several different alloy or intermetallic phase systems consisting of Cr, Ni, Ti or Mg in combination with Si are investigated on their use as a stabilizing matrix for Si based anode systems. Thin films of the binary systems are obtained via a co-magnetron sputter deposition process, in which we are able to steer the composition of the system by varying different parameters like the applied RF power during deposition. The as prepared thin films are electrochemically characterized by galvanostatic cycling as well as cyclic voltammetry. Embedding silicon in different alloys or intermetallic phases drastically changes the electrochemical performance, increasing capacity retention and cycle life of the anode system in lithium ion battery application.
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