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Related Experiment Video

Updated: Jun 19, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

Simultaneous Enhancement of Lithium Transfer Kinetics and Structural Stability in Dual-Phase TiO₂ Electrodes by

Jie Zheng¹, Rui Xia¹, Najma Yaqoob^1,2

¹MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, Enschede 7500AE, The Netherlands.

ACS Applied Materials & Interfaces

|February 8, 2024

Summary

Ruthenium (Ru⁴⁺) doping enhances dual-phase titanium dioxide (TiO₂) for faster lithium-ion batteries. This modification improves lithium diffusion and cycling stability, offering a new strategy for advanced battery performance.

Keywords:

dual-phase TiO2 lithium ion diffusion lithium-ion batteries ruthenium doping structure stability

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Published on: October 26, 2017

Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Dual-phase TiO₂ (titanium dioxide) shows promise for fast-charging lithium-ion batteries due to its unique phase boundaries.
Limited understanding of cation doping effects hinders further performance enhancement of TiO₂ electrodes.

Purpose of the Study:

To investigate the impact of Ruthenium (Ru⁴⁺) doping on the dual-phase structure of TiO₂.
To evaluate the resulting lithium storage performance and electrochemical properties.

Main Methods:

Synthesis and structural characterization of Ru-doped TiO₂ (1-RTO) with optimized doping ratios.
Electrochemical performance testing including rate capability and cycling stability.
In situ X-ray diffraction and density functional theory (DFT) calculations to understand lithium diffusion mechanisms.

Main Results:

An optimized Ru:Ti ratio (0.01:0.99) maintains dual-phase TiO₂ crystallinity, crucial for performance.
Ru⁴⁺ doping significantly improves lithium diffusion kinetics in the bronze phase of TiO₂.
1-RTO electrodes exhibit enhanced cycling stability (82.1% capacity retention after 1200 cycles) compared to undoped TiO₂ (56.1%).
In situ XRD indicates reduced phase separation in lithiated anatase, stabilizing the structure during cycling.

Conclusions:

Ru⁴⁺ doping is an effective strategy to simultaneously enhance the rate capability and cycling stability of dual-phase TiO₂.
This doping approach offers a promising pathway for developing advanced electrodes for fast-charging lithium-ion batteries.