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Updated: Sep 11, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
A chemically pre-sodiated Na15Sn4 interphase enables high-reversibility anode-less sodium-metal batteries
Jiacheng Liu1, Liuyan Hou1, Ahu Shao1
1State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China. mayue04@nwpu.edu.cn.
Abstract:
Anode-free batteries promise high energy density but suffer from dendrites, dead sodium, and cathode Na depletion that slow ion diffusion and charge transfer. We introduce the facile chemical pre-sodiation of Cu current collectors to form a Na15Sn4@Cu coating, which enhances Na affinity, supports uniform nucleation, and suppresses dendrites. Operando XRD confirms improved Na diffusion in NaNi0.5Mn0.5O2, yielding markedly enhanced reversible capacity and cyclability for anode-less sodium-metal batteries.
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