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Tailored Ta2O5/TiO2 Nanointerfaces Engineering for Reinforced Structural Integrity and High-Voltage Performance of
Hanbo Yin1, Jiongzhi Zheng2, Fenghua Zheng3
1School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|October 28, 2025
Summary
Surface modification with Ta2O5 and TiO2 enhances single-crystal nickel-rich cathode materials for lithium-ion batteries (LIBs), improving stability and performance.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Single-crystal Ni-rich ternary materials show promise for lithium-ion batteries (LIBs) due to high capacity.
- Challenges include phase transitions, poor Li+ diffusion, oxygen loss, and side reactions.
Purpose of the Study:
- To enhance the stability and electrochemical performance of single-crystal LiNi0.8Co0.1Mn0.1O2 (SC-NCM) cathode materials.
- To address degradation issues hindering practical LIB applications.
Main Methods:
- Surface modification of SC-NCM using Ta2O5 and TiO2.
- Electrochemical testing of modified and pristine materials under various voltage conditions.
- Pouch cell performance evaluation.
Main Results:
- Dual modification stabilized lattice oxygen, suppressed cation mixing, and improved Li+ diffusion.
- Modified SC-NCM retained 91.1% capacity after 200 cycles (vs. 54.9% for pristine).
- Modified material showed 64.2% capacity retention at 4.5 V cutoff, nearly double the pristine material.
Conclusions:
- Synergistic surface modification with Ta2O5 and TiO2 effectively enhances the performance of Ni-rich single-crystal cathode materials.
- This strategy offers a pathway for designing advanced cathode materials for high-performance LIBs.
