WHAT: Cu electrodeposition and stripping studied by in situ electrochemical STXM with electrolyte FLOW

Frame from movie correlating cyclic voltammetry and chemical mapping derived from 3 STXM images at the Cu 2p (L3) edge measured repeatedly. Potential scan rate was 5 mV/s.

Click on the image or link to movie in multi-gif or mp4 format.

OTHER INFORMATION:
In collaboration with Norcada Inc, Martin Obst (U. Bayreuth), Sarah Harmer--Bassell (Adelaide U) and Jian Wang (CLS), we have designed, built and commissioned the phase 1b system for in situ flow electrochemistry. Here results from the Jan 2017 CLS a-STXM study of Cu deposition and stripping from a 10 mM, 0.1 M CuSO4 solution are presented as a movie correlating the current-voltage changes in 3-cycles of a continuous cyclic voltammogram (5 mV/s) and chemical maps of the working electrode derived from 3-energy imaging at the Cu 2p edge. The continuous flow helped stabilize the cell performance by replensishing electrolyte which otherwise would be locally depleted due to irreversible dendrite formation.

Details of the in situ flow electrochemical cell and its assembly are given in this movie.

Publication: V. Prabu et al, Review of Scientific Instruments 89 (2018) 063702