Related Experiment Video
Updated: Oct 20, 2025
Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells
Published on: February 1, 2016
Engineering a Robust Interface on Ni-Rich Cathodes via a Novel Dry Doping Process toward Advanced High-Voltage
Liang Luo1,2, Ding Wang1, Zhongren Zhou1
1National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Lianhua Campus, Xuefu Road, Kunming 650093, China.
A novel dry interface modification using a Ti-based architecture enhances Ni-rich cathode materials for electric vehicle batteries. This method improves high-voltage stability and cycling performance, addressing key limitations in current battery technology.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Ni-rich layered oxides are crucial cathode materials for high-energy-density electric vehicle (EV) cells due to their capacity, cost, and low toxicity.
- However, their high-voltage stability is limited by intrinsic structural and electrochemical instability.
- Current wet modification processes can cause surface lithium-ion deficiency, phase changes, and increased manufacturing costs.
Purpose of the Study:
- To develop a solvent-free, dry interface modification process for Ni-rich cathode materials.
- To construct a multifunctional Ti-based interfacial architecture on LiNi0.6Co0.2Mn0.2O2 (NCM) surfaces.
- To enhance the electrochemical performance and stability of NCM cathode materials for demanding battery applications.
Main Methods:
- A novel dry interface modifying process was employed, avoiding solvents.
- A Ti-based interfacial architecture was constructed on the surface of LiNi0.6Co0.2Mn0.2O2 cathode materials.
- Electrochemical performance was evaluated using half cells, including cycling stability tests at high voltage (4.5 V) and extended charge-discharge cycles (500 cycles).
Main Results:
- The Ti-based architecture accelerated lithium-ion transportation and stabilized the interfacial structure.
- A 15% increase in capacity retention was observed over 100 cycles at 1 C under 4.5 V in half cells.
- Modified NCM samples showed minimal internal cracks after 500 cycles between 2.75 and 4.35 V at 1 C, with 93% capacity retention.
Conclusions:
- The dry, solvent-free Ti-based interface modification effectively enhances the high-voltage stability and cycling performance of Ni-rich NCM cathode materials.
- This approach offers a cost-effective and manufacturing-friendly alternative to traditional wet modification methods.
- The improved stability and performance demonstrate the potential of this method for next-generation power batteries.
More Related Videos
11:03Nanoscale Characterization of Liquid-Solid Interfaces by Coupling Cryo-Focused Ion Beam Milling with Scanning Electron Microscopy and Spectroscopy
Published on: July 14, 2022
10:58Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
Published on: March 7, 2018