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Highlight 2 Zeon Products Making Contributions to Society
Zeon’s energy materials supporting lithium-ion batteries
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  • Zeon’s energy materials supporting lithium-ion batteries

Today’s smartphone batteries have greater capacity, output, and operating life than yesterday’s cell phones. Lithium-ion rechargeable batteries are also used in electric and hybrid vehicles. These batteries have been adopted in vehicles because of their recognized safety performance.
In the growing lithium-ion rechargeable batteries market, we have been focusing on the potential of binders used in the batteries. Zeon’s energy materials are one factor contributing to the widespread use of lithium-ion rechargeable batteries today.

Growing lithium-ion rechargeable battery market for automobiles

Lithium-ion rechargeable batteries were commercialized in 1991, and their market has grown from their contributions to the spread of desktop and laptop computers as well as cell phones. Lithium-ion batteries were first used in vehicles in 2010, and by 2016 the automotive battery market quickly grew to about the same size as the mobile electronics battery market. The high growth seen in the automotive lithium-ion rechargeable battery market is expected to increase further with the rising number of hybrid and electric vehicles in the market. The markets where Zeon’s energy materials can make contributions are also expected to expand.
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Zeon’s Energy Materials

Sealants

Compounds for coating the gasket surface of cylindrical lithium-ion batteries to increase the adhesive properties of the cylinder’s exterior and cap.
Zeon’s sealants offer excellent heat resistance, cold resistance, and electrolyte resistance. They help prevent battery leakage to preserve battery performance and extend operating life.
➡Contributing to longer life

Cathode and anode binders

Lithium-ion rechargeable batteries comprise cathode materials made from metal oxide including lithium, anode materials that attract lithium ions, the electrolyte that transfers the lithium ions between the cathode and anode, and a separator that electrically separates the cathode and anode. The basic function of the cathode and anode binder is to bind the cathode and anode particulate material to the electrodes. Binders have received attention recently for their ability to control interface reactions with the active material and the electrolyte solution.
Zeon’s binders create the right amount space in the active material for lithium ions to pass and are resistant to volume expansion and shrinking from battery charging and discharging.
➡Contributing to longer life

Zeon’s binders not only bind, they support the chemical reactions occurring on the surface of the active materials. This enhances the reactions to increase battery output.
➡Contributing to higher output

Functional Layer Binders

To meet the growing needs for safety, battery structures that separate the heat-resistant layer or coat the electrode surfaces to prevent internal short circuits have been commercialized.
Zeon started this development in 2003 and released a binder for the heat-resistant layer in 2005. We are expanding sales of this binder mainly for automotive applications. In 2013, we released a slurry for the heat-resistant layer.
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