title: Direct mapping of ionic transport in a Si anode on the nanoscale: time domain electrochemical strain spectroscopy study.
abstract: Local Li-ion transport in amorphous silicon is studied on the nanometer scale using time domain electrochemical strain microscopy (ESM). A strong variability of ionic transport controlled by the anode surface morphology is observed. The observed relaxing and nonrelaxing response components are discussed in terms of local and global ionic transport mechanisms, thus establishing the signal formation mechanisms in ESM. This behavior is further correlated with local conductivity measurements. The implications of these studies for Si-anode batteries are discussed. The universal presence of concentration-strain coupling suggests that ESM and associated time and voltage spectroscopies can be applied to a broad range of electrochemical systems ranging from batteries to fuel cells.
authors: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
authors: Stephen
authors: S
authors: Jesse
authors: Nina
authors: N
authors: Balke
authors: Eugene
authors: E
authors: Eliseev
authors: Alexander
authors: A
authors: Tselev
authors: Nancy J
authors: NJ
authors: Dudney
authors: Anna N
authors: AN
authors: Morozovska
authors: Sergei V
authors: SV
authors: Kalinin
mesh_terms: D058266:Dielectric Spectroscopy / Q000379:methods*; D055119:Elastic Modulus; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D017136:Ion Transport; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D012825:Silicon