LiOH Decomposition by NiO/ZrO 2 in Li-Air Battery: Chemical Imaging with Operando Synchrotron Diffraction and Correlative Neutron/X-Ray Computed-Tomography Analysis.

Autor: Anchieta CG; Swiss Light Source, Paul Scherrer Institut, Forschungsstrasse 111, Villigen, 5232, Switzerland., Francisco BAB; Advanced Energy Storage Division, Center for Innovation on New Energies (CINE), Laboratory of Advanced Batteries, School of Chemical Engineering, University of Campinas (Unicamp), Campinas, SP, 13083-852, Brazil., Júlio JPO; Advanced Energy Storage Division, Center for Innovation on New Energies (CINE), Laboratory of Advanced Batteries, School of Chemical Engineering, University of Campinas (Unicamp), Campinas, SP, 13083-852, Brazil., Trtik P; Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, Forschungsstrasse 111, Villigen, 5232, Switzerland., Bonnin A; Swiss Light Source, Paul Scherrer Institut, Forschungsstrasse 111, Villigen, 5232, Switzerland., Doubek G; Advanced Energy Storage Division, Center for Innovation on New Energies (CINE), Laboratory of Advanced Batteries, School of Chemical Engineering, University of Campinas (Unicamp), Campinas, SP, 13083-852, Brazil., Sanchez DF; Swiss Light Source, Paul Scherrer Institut, Forschungsstrasse 111, Villigen, 5232, Switzerland.
Jazyk: angličtina
Zdroj: Small methods [Small Methods] 2024 Oct; Vol. 8 (10), pp. e2301749. Date of Electronic Publication: 2024 Jan 06.
DOI: 10.1002/smtd.202301749
Abstrakt: Li-air batteries attract significant attention due to their highest theoretical energy density among all existing energy storage technologies. Currently, challenges related to extending lifetime and long-term stability limit their practical application. To overcome these issues and enhance the total capacity of Li-air batteries, this study introduces an innovative approach with NiO/ZrO 2 catalysts. Operando advanced chemical imaging with micrometer spatial resolution unveils that NiO/ZrO 2 catalysts substantially change the kinetics of crystalline lithium hydroxide (LiOH) formation and facilitate its rapid decomposition with heterogeneous distribution. Moreover, ex situ combined neutron and X-ray computed tomography (CT) analysis, provide evidence of distinct lithium phases homogeneously distributed in the presence of NiO/ZrO 2 . These findings underscore the material's superior physico-chemical and electronic properties, with more efficient oxygen diffusion and indications of lower obstruction to its active sites, avoiding clogging in the active electrode, a common cause of capacity loss. Electrochemical tests conducted at high current density demonstrated a significant kinetic enhancement of the oxygen reduction and evolution reactions, resulting in improved charge and discharge processes with low overpotential. This pioneering approach using NiO/ZrO 2 catalysts represents a step toward on developing the full potential of Li-air batteries as high-energy-density energy storage systems.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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