Plugging in an EV at a parking lot is now an everyday scene. As EV batteries go through countless charge–discharge cycles and throughout this process, the electrodes inside them continuously change as well.

Even a microscopic shift in electrode structure can hinder electron movement, which ultimately impact overall battery performance. This is why it is crucial for the electrode materials to stay firmly in place and maintain their original structure.

So, how do these materials stay put? Today, we’re taking a closer look at a key material that makes this possible: the Anode Binder.

How Batteries Generate Power

Lithium-ion batteries used in EVs consist of four main components: the cathode, anode, electrolyte and separator. When the battery is charged, lithium ions are stored in the anode. When the circuit is connected, these ions move from the anode to the cathode through the electrolyte, while electrons flow through the external circuit generating electricity.  The electrolyte acts as the pathway for the ions, while the separator prevents the cathode and anode from coming into contact and causing a short circuit.

Three Key Materials of Anode

An anode is typically formed using three core materials:

• Active Material: Stores and releases lithium ions to create current
• Conductive Additive: Helps electrons move efficiently
• Binder: Holds the materials firmly onto the current collector (a thin foil).

As the name suggests, a Binder is designed to “bind” things together. In batteries, it helps the active material and conductive additive settle uniformly on the current collector and securely fixed, even during repeated charging and discharging.

Why Strong Adhesion Matters for Performance

During repeated charging and discharging, batteries undergo continuous microscopic expansion and contraction. If the binder does not provide sufficient adhesion,  the electrode structure can warp, causing the gap between active materials to widen.

This can disrupt electron pathways. When electron movement becomes less efficient, current flow weakens or slows down, leading to drop in battery performance. To maintain long-term battery performance, electrode materials must remain stable as originally designed. The Anode Binder is the unsung hero that provides this vital stability.

LG Chem’s Anode Binder: Engineered for Stronger Performance

LG Chem’s Anode Binders are engineered with three core strengths:

1. High-Adhesion Performance: Grips materials firmly to prevent detachment.
2. Low-Resistance Characteristics: Ensures the binder doesn’t interfere with the flow of electricity.
3. Excellent Cycle Characteristics: Maintains performance even after repeated charging and discharging.

LG Chem delivers differentiated performance through specialized particle design, optimized composition and advanced SB (Styrene-Butadiene Latex) & SA (Styrene-Acrylic Latex) blending technologies.

The binder are engineered to be distributed evenly throughout the electrode rather than aggregating in one area, maximizing adhesion efficiency. With high adhesion and low resistance, LG Chem plays a pivotal role in preventing battery degradation and maintaining stable performance over the long haul.

The Hidden Star of Battery Performance

An anode binder might look like a simple “adhesive,” but it plays a critical role in stabilizing electrode structure and sustaining battery performance.  Next time you see an EV, remember this hidden hero working behind the scenes to power your journey!

Learn more about HDPE 👉 Anode Binder | Petrochemicals | Product | LG Chem

※ Some images in this content were generated using AI.