Cathode Interface Compatibility of Amorphous LiMn2O4 (LMO) and Li7La3Zr2O12 (LLZO) Characterized with Thin-Film Solid-State Electrochemical Cells.
Alexander A DelluvaJessica DudoffGlenn TeeterAdam HolewinskiPublished in: ACS applied materials & interfaces (2020)
Solid-state lithium-ion batteries are a hopeful successor to traditional Li-ion cells that use liquid electrolytes. While a growing body of work has characterized the interfaces between various solid electrolytes and the lithium metal, interfaces with common cathode intercalation compounds are comparatively less understood. In this contribution, the influence of polarization and temperature on interfacial stability between LiMn2O4 (LMO) and Li7La3Zr2O12 (LLZO) are investigated. Sputtered thin-film LMO electrodes are utilized to permit high-capacity cycling while retaining a large ratio of interfacial area to electrode bulk. Electrochemical impedance spectroscopy (EIS) is compared across a set of full (LMO|LLZO|Li) and symmetric (LMO|LLZO|LMO, Li|LLZO|Li, and Au|LLZO|Au) cells to delineate impedance features that are specific to the evolution of the cathode interface. Additional X-ray photoelectron spectroscopy (XPS) provides evidence of a limited interfacial reaction between LMO and LLZO that coincides with an increase in the impedance of the LMO-LLZO interface.
Keyphrases
- solid state
- ion batteries
- induced apoptosis
- ionic liquid
- cell cycle arrest
- reduced graphene oxide
- gold nanoparticles
- electron transfer
- molecular dynamics simulations
- endoplasmic reticulum stress
- signaling pathway
- oxidative stress
- dual energy
- sensitive detection
- solar cells
- pi k akt
- mass spectrometry
- magnetic resonance
- molecularly imprinted
- room temperature
- high intensity
- atomic force microscopy