Materials for lithium ion batteries
artience group leverages its unique dispersion technology and conductivity control technology that it has cultivated over many years to improve the characteristics of lithium-ion batteries, stabilize product quality, and reduce process costs.By contributing to the spread of power storage systems, Contributing to solving problems.
What is lithium ion battery?
A lithium-ion battery is a secondary battery that charges and discharges by moving lithium ions between the positive and negative electrodes. A secondary battery is a battery that can be recharged and used over and over again, whereas a disposable battery like a dry cell battery is called a primary battery.
Lithium-ion batteries were commercialized in the early 1990s. Because they have advantages such as high energy density (allowing for smaller size), resistance to deterioration, and long lifespan, they are used in many types of equipment such as smartphones, notebook computers, electric cars, and artificial satellites.
How lithium ion batteries work
Lithium-ion batteries charge and discharge by moving lithium ions between the positive and negative electrodes. Charging occurs when lithium ions exit from the positive electrode and enter the negative electrode, and discharging occurs when lithium ions exit from the negative electrode and enter the positive electrode (Figure 1).
A positive electrode uses three main materials: an active material, a conductive additive, and a binder. Among these, the electronic conductivity (resistance of the battery) changes greatly depending on the state of the conductive agent surrounding the active material in the electrode.
Main material of positive electrode
- Active material: Something that takes in/releases lithium ions
- Conductive aid: A substance that aids in electron conductivity. Carbon black is mainly used.
- Binder: Something that plays a role in binding active materials and conductive additives. Generally, a resin called PVdF (polyvinylidene fluoride) is used.
CNT dispersion for lithium-ion battery cathode materials LIOACCUM™
TOYOCOLOR HAS STRENGTHS IN CARBON DISPERSION, AND SINCE 2015 HAS BEEN SUPPLYING CARBON DISPERSIONS FOR LITHIUM-ION BATTERY CATHODE MATERIALS, AND HAS ACCUMULATED TRUST AND ACHIEVEMENTS AS A LITHIUM-ION BATTERY MATERIAL MANUFACTURER.
LIOACCUM™, a conductive CNT dispersion for lithium-ion battery cathode materials developed by our companyIn addition to extending the cruising range of EVs by using its proprietary dispersion technology to enable stable CNT dispersion and increase the capacity of lithium-ion batteries, we will solve the problems faced by lithium-ion batteries such as battery safety, miniaturization, charging speed, and durability.
We are highly regarded for our high technological capabilities and the only CNT dispersion manufacturer with a four-pole, five-base production system capable of stable procurement, production, and supply in the major automotive markets of North America, Europe, China, and Japan.
The positive electrode material of lithium-ion batteries mainly consists of an active material, a conductive additive, and a binder. By using CNT (carbon nanotubes) instead of carbon black as a conductive agent, it is possible to demonstrate conductive performance with a small amount of conductive agent.
Benefits of using CNTs as conductive aids for lithium-ion batteries
- High capacity: Increasing the capacity of lithium-ion batteries by increasing the amount of active material filled
- High output: High output of lithium-ion batteries due to high conductivity
- Long life: Longer life of lithium-ion batteries through uniform use of active materials
TOYOCOLOR has developed high-performance CNTs in collaboration with CNT manufacturers, and has also dramatically improved the dispersibility and conductivity of CNTs using proprietary additives and dispersions manufacturing methods. We succeeded in significantly lowering the resistance value of the positive electrode of ion batteries. This reduces the cost of conductive materials in lithium-ion batteries, and by making it possible to increase the amount of active material in the positive electrode, it increases battery capacity, extending the cruising range of EVs and improving quick charging performance. To do.
Internal structure of LiB electrode
artience group has established a position as the only CNT dispersions manufacturer with a production system in 4 locations and 5 locations that enables stable procurement, production, and supply in the major automobile markets of North America, Europe, China, and Japan. Masu.
LiB's four major markets and artience group bases
Battery Binder LIOACCUM™ Series
In addition to being a water-based binder for lithium-ion batteries, it can also be used as a binder for electrodes and separators. It has excellent electrolyte resistance, dispersion stability, adhesion to substrates, and heat resistance, and particle size and resin hardness (Tg) can be customized upon request.
Please see the following page for product details.
Yellowing resistant dry laminating adhesives
This is an acrylic adhesives that exhibits superior performance compared to urethane adhesives in terms of hydrolysis resistance, oil resistance, and yellowing resistance. It can be used around car batteries, parts that require heat resistance/durability, and electronic devices.
Please see the following page for product details.
Utilization of conductivity control technology
Our conductivity control technology, which is used in materials for lithium-ion batteries, is also used in other products, such as conductive silver paste that provides a thin film with low resistance, and bonding materials for semiconductors.
Through carbon material technology and carbon composite material technology, we will contribute to improving the functionality of various power storage devices and electronic devices.