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In situ characterizations of solid-solid interfaces in solid-state batteries using synchrotron X-ray techniques

Carbon Energy 2021年第5期3卷 762-783页

作者： marcos lucero Shen Qiu Zhenxing Feng School of Chemical Biologicaland Environmental EngineeringOregon State UniversityCorvallisOregonUSA

The solid-solid electrode-electrolyte interface represents an important component in solid-state batteries(SSBs),as ionic diffusion,reaction,transformation,and restructuring could all take *** these processes strongly influence the battery performance,studying the evolution of the solid-solid interfaces,particularly in situ during battery operation,can provide insights to establish the structure-property relationship for *** X-ray techniques,owing to their unique penetration power and diverse approaches,are suitable to investigate the buried interfaces and examine structural,compositional,and morphological *** this review,we will discuss various surface-sensitive synchrotron-based scattering,spectroscopy,and imaging methods for the in situ characterization of solid-solid interfaces and how this information can be correlated to the electrochemical properties of *** goal is to overview the advantages and disadvantages of each technique by highlighting representative examples,so that similar strategies can be applied by battery researchers and beyond to study similar solid-solid interface systems.

关键词： in situ characterizations solid-state battery solid-solid interface synchrotron X-ray

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Dual-shell silicate and alumina coating for long lasting and high capacity lithium ion batteries

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Journal of Energy Chemistry 2022年第5期31卷 314-323页

作者： marcos lucero Tucker M.Holstun Yudong Yao Ryan Faase Maoyu Wang Alpha T.N’Diaye David P.Cann Joe Baio Junjing Deng Zhenxing Feng School of Chemical Biologicaland Environmental EngineeringOregon State UniversityCorvallisOR 97331United States Advanced Photon Source Argonne National LaboratoryArgonneIllinois 60439United States Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCalifornia 94720United States Materials Science School of MechanicalIndustrialand Manufacturing EngineeringOregon State UniversityCorvallisOR 97331United States

Here we demonstrate a theory-driven, novel dual-shell coating system of Li_(2)SrSiO_(4) and Al_(2)O_(3), achieved via a facile and scalable sol-gel technique on LiCoO_(2) electrode particles. The optimal thickness of each coating can lead to increased specific capacity(~185 m Ah/g at 0.5 C-rate) at a cut-off potential of 4.5 V, and greater cycling stability at very high C rates(up to 10 C) in half-cells with lithium metal. The mechanism of this superior performance was investigated using a combination of X-ray and electron characterization methods. It shows that the results of this investigation can inform future studies to identify still better dual-shell coating schemes, achieved by such industrially feasible techniques, for application on similar, nickel-rich cathode materials.

关键词： Lithium cobalt oxide Surface coating Sol-gel Silicate Alumina X-ray absorption spectroscopy

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