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Updated: Jan 9, 2026
Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
Layered-to-Tunnel Transformation Enabled by Coordination Bond Reorganization in Oxide Cathodes for Sodium-Ion
Kang Chen1,2, Qilin Zheng1,2, Min Wen1,2
1College of Physics and Energy Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fujian Normal University, Fuzhou 350117, P. R. China.
Abstract:
Designing composite structures to enhance the performance of manganese-based sodium-ion battery (SIB) cathodes now represents a significant research focus. However, the development of composite-phase cathodes is hindered by an incomplete understanding of their structural transformation mechanisms. Herein, we elucidate the relationship between the transition metal bond energy and material structure, proposing a coordination bond reorganization strategy to drive structural transformations. This concept is demonstrated using the cathode material Na0.63Mn1-xTixO2, showing that the bond energy of transition metals plays a critical role in the structural transformation process. By introducing stronger Ti-O covalent bonds, we achieved the transition from a layered to tunnel structure. Furthermore, the layered-tunnel intergrowth structure Na0.63Mn0.95Ti0.05O2 demonstrates a remarkable specific capacity of 194.68 mAh g-1 alongside excellent stability while exhibiting good compatibility with hard carbon anodes. This work validates the feasibility of coordination bond reorganization as a mechanism for autonomous structural transformations, offering new insights for the precise design of high-energy-density materials for next-generation SIBs.
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