X-ray absorption spectromicroscopy gives access to Li(1+x)Al(x)Ge(2−x)(PO4)(3) (LAGP) local degradation at the anode-electrolyte interface

The Journal of Power Sources Advances have published an article about batteries with inorganic solid-state electrolytes (ISSE), which are’ attracting notable interest for next-generation systems implementing Lithium (Li) metal anodes, in view of achieving higher energy densities combined with superior safety’.

One of the main challenges in the way of development of this technology is the stability of the ISSEs, predominantly at the anodic interface. This study focuses on the “issue for the specific case of the LAGP/Li (Lithium Aluminium Germanium Phosphate/Lithium) interface with a micro-spectroscopic approach centred on post mortem Scanning Transmission X-ray Microscopy (STXM) of intact LMO/LAGP/Li thin-film batteries, microfabricated in discharged state.”

For the battery microfabrication, electrodes and electrolytes “were directly grown and nanofabricated by a four-step optical lithography process and lift-off” on Silson’s suspended silicon nitride membranes (of frame size 5.0 x 5.0 mm and membrane size 0.5 x 0.5 mm and thickness 75 nm).

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