2025年1月5日 · Different migration intermediate states demonstrate the distinct ion migration mechanisms inside the LiMn 2 O 4 lattice at different electron fluxes. Furthermore, direct observation of the distribution of Li + in LiMn 2 O 4 -based membrane at different layered locations using Laser-induced Breakdown Spectroscopy (LIBS) reveals that the rate ...

2021年8月12日 · The authors report a 1st-principles study of defect thermodn. and transport in spinel-type LiMn2O4, an important Li-ion battery electrode material, using d.-functional theory and the Heyd-Scuseria-Ernzerhof screened hybrid functional. Intrinsic point defects in LiMn2O4 have low formation energies and hence can occur with high concns.

To enhance its practical application, it is crucial to elucidate the ion/electron transfer mechanism under diverse process conditions particularly different electron fluxes. Different migration intermediate states demonstrate the distinct ion migration mechanisms inside the LiMn2O4 lattice at different electron fluxes.

The charge-transfer kinetics of lithium ion intercalation into Li x Mn 2 O 4 cathode materials was examined in dilute and concentrated aqueous and carbonate LiTFSI solutions using electrochemical methods. Distinctive trends in ion intercalation rates were observed between water-based and ethylene carbonate/diethyl carbonate solutions.

2024年10月1日 · This work emphasizes the significance of synergistically optimizing ion diffusion channels and electron transfer paths for enhancing electrochemical processes and provides a path for constructing similar pore structures in various ion–electron-related applications.

2016年4月26日 · This paper investigates the effects of surface orientation and doping on the dissolution of Mn ions from LiMn 2 O 4 structures using first principles calculations. Our aim is to understand why certain surface orientations and element dopings produce structures with …

1998年7月1日 · Transport properties of LiMn 2 O 4 prepared under different conditions are characterized using impedance spectroscopy and 4-probe DC techniques. Results indicate that LiMn 2 O 4 is a mixed ionic–electronic conductor with lithium-ion transference number varying from about 0.67 to 0.92, depending on conditions of preparation.

2024年8月27日 · We demonstrate that the increased entropy in LiMn 2 O 4 leads to an increase in the disordering of dopant cations and a contracted local structure, where the enlarged LiO 4 space and enhanced...

2013年4月1日 · The interaction between LiMn 2 O 4 microspheres and Mb provide a biocompatible microenvironment for enzyme loading and retaining the native bioactivity, which play an important role in establishing a fast electron …

Herein, using LiMn2O4 as the model system, we demonstrated that nickel surface doping to construct a new interface owning lower charge-transfer energy barrier, could effectively facilitate the interfacial process and in-hibit the capacity loss with decreased temperature.