Advanced 3D Imaging, Analysis and Characterisation of Zn Dendrite Formation in a Zn-Air Battery
The performance of the battery is dependent on the nano and micro-structure achieved during manufacture. Furthermore microstructural evolution during operation may degrade electrochemical performance. The growth of dendrites represents a limiting failure mechanism in some battery systems; in particular this can be a challenge in zinc-air batteries. Tomographic techniques allow the direct 3D imaging and characterisation of complex microstructures, including the observation and quantification of dendrite growth.
Here we present results from 3D x-ray and FIB-SEM tomography of Zn dendrite formation in a zinc-air battery, down to resolutions of tens of nanometers, enabling analysis of dendrite micro-structure.
This approach is shown to be effective in understanding how dendrites grow, and demonstrates that tomography coupled with modeling can provide new insights into degradation mechanisms associated with dendrite growth.