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Updated: Jun 26, 2026
10:03
Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
Stabilizing Lattice Oxygen Redox Through Bicarbonate Pyrolysis-Driven Multifunctional Interface Engineering in
Hongyu Zhu1, Shaoyun Yang1, Lu Lu1
1Guangxi Key Laboratory of Low Carbon Energy Materials, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, China.
Small (Weinheim an Der Bergstrasse, Germany)
|June 25, 2026
Summary
Interface engineering using bicarbonate pyrolysis enhances Li-rich layered oxide cathodes for next-generation lithium-ion batteries, significantly improving stability and energy density.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Li-rich layered oxides (LRs) offer high capacity for lithium-ion batteries (LIBs).
- Commercialization is hindered by capacity fading, voltage decay, and oxygen release.
- Advanced cathode materials are crucial for next-generation energy storage.
Purpose of the Study:
- To develop an innovative interface engineering strategy for Li-rich layered oxides.
- To enhance the electrochemical performance and stability of LRs.
- To address the challenges of capacity fading and voltage decay in LIBs.
Main Methods:
- Interface engineering via bicarbonate pyrolysis.
- Surface modification with a spinel-phase layer and oxygen vacancies.
- Doping with K+, Na+, or Mg2+ near the surface.
- Ex/in situ characterizations and theoretical calculations.
Main Results:
- Constructed a coherent spinel-phase surface layer and generated oxygen vacancies.
- Optimized KHCO3-treated sample (SK-LR) showed 94.9% capacity retention after 500 cycles (1C).
- SK-LR achieved high energy density (1110.5 Wh kg-1), improved rate capability, and thermal stability.
- Stabilized lattice oxygen, strengthened Mn-O bonds, and optimized ion/electron transport.
Conclusions:
- Interface engineering effectively enhances the stability and performance of Li-rich cathodes.
- Bicarbonate pyrolysis offers a viable pathway for developing ultra-stable, high-energy density LIBs.
- The developed method addresses key limitations of Li-rich layered oxides for practical applications.
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