Quantifying microstructural dynamics and electrochemical activity of graphite and silicon-graphite lithium ion battery anodes.

ABSTRACT: Despite numerous studies presenting advances in tomographic imaging and analysis of lithium ion batteries, graphite-based anodes have received little attention. Weak X-ray attenuation of graphite and, as a result, poor contrast between graphite and the other carbon-based components in an electrode pore space renders data analysis challenging. Here we demonstrate operando tomography of weakly attenuating electrodes during electrochemical (de)lithiation. We use propagation-based phase contrast tomography to facilitate the differentiation between weakly attenuating materials and apply digital volume correlation to capture the dynamics of the electrodes during operation. After validating that we can quantify the local electrochemical activity and microstructural changes throughout graphite ele

SUBMITTER: Pietsch P 

PROVIDER: S-EPMC5052642 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature