Structure-activity correlation of thermally activated graphite electrodes for vanadium flow batteries.

ABSTRACT: Thermal activation of graphite felts has proven to be a valuable technique for electrodes in vanadium flow batteries to improve their sluggish reaction kinetics. In the underlying work, a novel approach is presented to describe the morphological, microstructural, and chemical changes that occur as a result of the activation process. All surface properties were monitored at different stages of thermal activation and correlated with the electrocatalytic activity. The subsequently developed model consists of a combined ablation and damaging process observed by Raman spectroscopy, X-ray photoelectron spectroscopy and scanning electron microscopy. Initially, the outermost layer of adventitious carbon is removed and sp² layers of graphite are damaged in the oxidative atmosphere, which

SUBMITTER: Lindner A 

PROVIDER: S-EPMC9092384 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature