A Novel Graphene Based Bi-Function Humidity Tolerant Binder for Lithium-Ion Battery

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Binders are crucial in lithium-ion batteries (LIBs) for electrode integrity and conductivity.
• Current polymer binders (PVDF, CMC/SBR) lack electronic and ionic conductivity, limiting battery performance.
• Developing advanced binders is key to improving LIB efficiency and lifespan.

Purpose of the Study:

• To introduce a novel organic/inorganic hybrid conductive binder (LAP-rGO) for LIBs.
• To evaluate the performance of LAP-rGO in both anode and cathode applications.
• To address the limitations of conventional polymer binders in LIBs.

Main Methods:

• Synthesis of a hybrid binder comprising 2D reduced graphene oxide sheets with anchored alkane chains.
• Fabrication of electrodes using the LAP-rGO binder for LIBs.
• Electrochemical testing, including charge/discharge performance, cycling stability, and capacity measurements.

Main Results:

• Electrodes with LAP-rGO binder showed high bond strength and fast electrolyte diffusion.
• Significant capacity enhancement (130 mAh g⁻¹ at 5C) was observed for LiFePO₄ and Li₄Ti₅O₁₂ electrodes.
• Graphite anodes with LAP-rGO exhibited specific capacity exceeding theoretical values.
• Improved processing properties, including high humidity preparation and energy-efficient drying.

Conclusions:

• LAP-rGO serves as an effective conductive binder for both anode and cathode in LIBs.
• The hybrid binder enhances electron and lithium-ion transport, boosting battery performance and stability.
• LAP-rGO offers a promising alternative to conventional binders, improving energy efficiency and processing.