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Functionalized Cellulose-Based Binders for Lithium Cobalt Oxide Cathodes: Improving Stability and Lithium-Ion
Dong Luo1, Yinghao Xia1, Xiangyi Ye1
1Research Institute of Materials Science, Key Laboratory of Polymer Processing Engineering, South China University of Technology, Guangzhou, 510640, China.
Macromolecular Rapid Communications
|April 14, 2025
Summary
A new functionalized cellulose binder enhances lithium cobalt oxide (LCO) battery cathodes for high-voltage applications. This sustainable binder improves stability and performance, enabling LCO to retain 95.9% capacity after 200 cycles.
Area of Science:
- Materials Science
- Electrochemistry
- Chemical Engineering
Background:
- Lithium cobalt oxide (LCO) is crucial for high-energy-density lithium-ion batteries.
- High-voltage applications of LCO are limited by structural instability and side reactions.
- Conventional binders like polyvinylidene fluoride (PVDF) have limitations in high-voltage cathode performance.
Purpose of the Study:
- To develop a novel binder for stabilizing high-voltage LCO cathodes.
- To improve the structural integrity and electrochemical performance of LCO batteries.
- To explore sustainable binder alternatives for next-generation lithium-ion batteries.
Main Methods:
- Functionalization of cellulose by grafting polar groups to reduce crystallinity and improve solubility.
- Fabrication of LCO cathodes using the functionalized cellulose binder.
- Electrochemical testing, including cycling stability, capacity retention, and polarization measurements at high voltage (4.6 V).
Main Results:
- The functionalized cellulose binder demonstrated strong adhesion and enhanced ion transport.
- LCO cathodes with the new binder retained 95.9% of their capacity after 200 cycles at 4.6 V.
- The binder reduced polarization and facilitated lithium-ion diffusion, improving electrode stability.
Conclusions:
- Functionalized cellulose-based binders are effective in stabilizing high-voltage LCO cathodes.
- This approach offers a sustainable and high-performance alternative to conventional binders.
- The developed binder technology holds promise for advancing high-energy-density lithium-ion batteries.
