Local degradation pathways in lithium-rich manganese-nickel-cobalt-oxide epitaxial thin films.

ABSTRACT: The electrochemical performance and microstructure of positive electrodes are intimately linked. As such, developing batteries resistance to capacity and voltage fade requires understanding these underlying structure-properties relationships and their evolution with operation. Epitaxial films of a Li-rich manganese-nickel- cobalt oxide cathode material were deposited on (100) and (111) orientated SrRuO3/SrTiO3 substrates. Cyclic voltammetry and impedance spectroscopy tracked the response of these positive electrode materials, while the microstructure of the pristine and cycled films was characterized using transmission electron microscopy. Energy-dispersive X-ray spectroscopy identifies compositional fluctuations in as-deposited films. Phase transformations and dissolution were observed af

SUBMITTER: Johnston-Peck AC 

PROVIDER: S-EPMC7552892 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature