Presentation of Wanhua Chemical: Comprehensive Solutions for Lithium Battery Anode Binders

Overview of Lithium - Ion Battery Binders 

PVDF, CMC, PAA, etc.! Research on Lithium Battery Binders

LIBs electrodes are mainly composed of electrochemically active electrode materials, conductive additives, binders, current collectors, etc. Among them, binders are an important component of LIBs electrodes. Binders can tightly attach active substances and conductive agents to the current collector to form a complete electrode, prevent the active substances from falling off and peeling off during the charge and discharge process , and can evenly disperse the active substances and conductive agents, thereby forming a good electron and ion transmission network and realizing efficient transmission of electrons and lithium ions.

Learn more about battery adhesives

1. Battery Adhesive

Lithium battery pole pieces are mainly composed of active materials, conductive agents, and binders. Usually, binders are inactive materials and account for a small proportion of the electrode. However, binders are an indispensable and important component in the preparation of lithium batteries, and play an important role in maintaining the integrity of the electrode structure and improving the electrochemical performance of the electrode.

Key auxiliary materials for lithium batteries: binders

Polymer and its derivative binders

1 Cellulose binder

Sodium carboxymethyl cellulose (CMC) is a cellulose binder that has been widely studied. It is a carboxymethylated derivative of cellulose. CMC is an ionic chain polymer water-based binder that forms a transparent viscous glue after swelling with water. It has the advantages of being difficult to ferment, good stability, low price, safety and environmental protection.

Negative electrode binder performance requirements, test methods and failure mechanisms!

Binders have a low mass ratio in the electrode and do not participate in the electrochemical reaction. Their main function is to adhere the active material and the conductive agent to the current collector to keep the electrode intact . Binders affect the formation of the solid electrolyte interface (SEI) , the charge transfer inside the electrode and between the electrode - electrolyte interface , the wetting behavior of the electrode, and the cycle performance and cost of the battery .

Research and application of new binders in lithium batteries

I. Introduction

In the electrode materials of lithium batteries, the proportion of binder is usually between 1% and 10%. Its main function is to bind the active materials, current collectors and conductive agents of the electrode together, thereby enhancing the performance and stability of the electrode. The active materials and conductive agents in the electrode are often nano-scale, and these nano-materials are prone to agglomeration in high-concentration electrode slurries.

Analysis of Lithium Battery Injection Process

The role of lithium battery electrolyte is to conduct ions between the positive and negative electrodes and act as a medium for charging and discharging, just like blood in the human body. How to make the electrolyte fully and evenly infiltrate the interior of the lithium battery has become an important issue. Therefore, the injection process is a very important process that directly affects the performance of the battery.