Related Experiment Video
Updated: Apr 18, 2026
07:23
Construction and Testing of Coin Cells of Lithium Ion Batteries
Published on: August 2, 2012
33.2K
Calcium-Doped High-Voltage Spinel Cathode for Long Cycle Life Lithium-Ion Batteries
Jie Xiong1, Bingyao Zhou1, Kevin Mathew1
1Department of Chemical and Paper Engineering, Western Michigan University, 4601 Campus Drive, Kalamazoo, Michigan 49008-5462, United States.
ACS Applied Energy Materials
|April 17, 2026
Summary
Calcium doping enhances the stability and performance of high-voltage lithium nickel manganese oxide (LNMO) cathode materials for next-generation lithium-ion batteries, significantly improving capacity retention.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- High-voltage spinel LiNi0.5Mn1.5O4 (LNMO) is a promising cathode material for lithium-ion batteries (LIBs) due to its low cost and high operating voltage.
- Practical application of LNMO is limited by capacity decay from structural instability and side reactions.
Purpose of the Study:
- To improve the stability and electrochemical performance of LNMO cathodes.
- To investigate the effect of calcium (Ca) doping on LNMO's structural integrity and interfacial properties.
Main Methods:
- Synthesis of Ca-doped LNMO cathode materials.
- Electrochemical testing including cycling performance and rate capability.
- Material characterization to analyze structural and surface properties.
Main Results:
- Ca-doped LNMO (Ca 0.05 LNMO) exhibited significantly improved capacity retention (94.4% after 500 cycles) compared to undoped LNMO (73%).
- Ca 0.05 LNMO showed enhanced performance at elevated temperatures (84% capacity retention at 55 °C after 150 cycles vs. 69% for undoped).
- Doping stabilized the oxygen framework and surface, mitigating degradation.
Conclusions:
- Moderate Ca doping effectively enhances the structural stability and electrochemical performance of LNMO cathodes.
- Ca-doped LNMO offers a viable solution for developing high-performance next-generation lithium-ion batteries.
- This approach addresses key limitations hindering the practical application of LNMO materials.
